Home About us Contact
|
Home About us Contact | ||
|
|
||
Bi2O3
Selected AbstractsThe ,-to-, Transition in BiFeO3: A Powder Neutron Diffraction StudyADVANCED FUNCTIONAL MATERIALS, Issue 13 2010Donna C. Arnold Abstract High-temperature powder neutron diffraction experiments are conducted around the reported ,,, phase transition (,930,°C) in BiFeO3. The results demonstrate that while a small volume contraction is observed at the transition temperature, consistent with an insulator,metal transition, both the ,- and ,-phase of BiFeO3 exhibit orthorhombic symmetry; i.e., no further increase of symmetry occurs during this transition. The ,-orthorhombic phase is observed to persist up to a temperature of approximately 950,°C before complete decomposition into Bi2Fe4O9 (and liquid Bi2O3), which subsequently begins to decompose at approximately 960,°C. [source] Dielectric Relaxation in CaO,Bi2O3,B2O3 GlassesINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY, Issue 2010Koushik Majhi Glasses in the system CaO,Bi2O3,B2O3 (in molar ratio) have been prepared using melt-quenching route. Ion transport characteristics were investigated for this glass using electric modulus, ac conductivity and impedance measurements. The ac conductivity was rationalized using Almond,West power law. Dielectric relaxation has been analyzed based on the behavior of electric modulus behavior. The activation energy associated with the electrical relaxation determined from the electric modulus spectra was found to be 1.76 eV, close to that the activation energy for dc conductivity (1.71 eV) indicating that the same species took part in both the processes. The stretched exponent , (0.5,0.6) is invariant with temperature for the present glasses. [source] Inner Electrodes for Multilayer VaristorsINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY, Issue 2 2009Shu-Ting Kuo In the present study, Pt or AgPd metal is used as the inner electrode for Bi2O3 -doped ZnO multilayer varistors (MLV). The growth of the ZnO grains is constrained by the presence of the inner electrodes. The Pt inner electrodes are chemically inert to Bi2O3 -doped ZnO. The Bi2O3 could react with Pd to form PdBi2O4. The Bi2O3 -rich liquid also tends to wet the AgPd electrode. The size of ZnO grains in the MLV/AgPd specimen is larger. The ZnO grains in the MLV/AgPd specimen can even grow to a size larger than the layer thickness at the expense of electrode continuity. [source] Raman studies and optical properties of some (PbO)x(Bi2O3)0.2(B2O3)0.8,x glassesJOURNAL OF RAMAN SPECTROSCOPY, Issue 9 2008Katerina Kotkova Abstract Five (PbO)x(Bi2O3)0.2(B2O3)0.8,x glasses, where x = 0, 0.2, 0.3, 0.4 and 0.6, were prepared. The dilatometric glass transition temperature (Tg) was found in the region 470 (x = 0), Tg ( °C) , 347 (x = 0.6), and the density (,) varied within 4.57 (x = 0) , , (g/cm3) , 8.31 (x = 0.6). Raman spectra indicated the conversion of BO3 to BO4 entities for low x values but for x > 0.3, namely, for x , 0.6, back-conversion occurred, most probably. From the measurements of the optical transmission on very thin bulk samples, the room temperature optical gap values (Eg) were determined to be in the range 4.03 (x = 0), Eg (eV) , 3.08 (x = 0.6). The temperature (T) dependence of the optical gap (Eg(T)) in the region 300 , T(K) , 600 was examined and approximated by a linear relationship of the form of Eg(T) = Eg(0), ,T, where , × 10,4(eV/K) varied from 5.1 to 6.8. The non-linear refractive index (n2) was estimated from the optical gap values and it was found to correspond to the n2 values calculated from the experimental third-order non-linear optical susceptibility taken from the literature. Copyright © 2008 John Wiley & Sons, Ltd. [source] Photo-Induced Effect in Heavy Metal Oxide GlassesJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 4 2010Jong Heo Photo-induced phenomena in binary (PbO,Ga2O3) and ternary (PbO,Bi2O3,Ga2O3) heavy metal oxide glasses were investigated. A red shift up to ,0.05 eV in the absorption edge of 75PbO,25Ga2O3 glass (mol%) was observed by illuminating the subbandgap light for 30 min. This shift was completely erased by the heat treatment near the glass transition temperature. Refractive index of the glass at 600 nm also increased ,0.011 by the illumination. It is believed that the presence of lone-pair electrons associated with Pb-polyhedra is essential to realize a reversible photo-induced effect in these oxide glasses. [source] The Chemical Interaction of Silver,Palladium Alloy Electrodes with Bismuth-Based PiezomaterialsJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 4 2010Denis Schuetz Multilayer technology relies heavily on the chemical compatibility of metal and ceramic. This work focuses on the ceramic,electrode interaction between 92Bi0.5Na0.5TiO3,6 BaTiO3,2K0.5Na0.5NbO3 [(Bi0.46Na0.47Ba0.06K0.01)(Nb0.02Ti0.98)O3], a promising actuator material and forerunner to an emerging class of lead-free actuator materials, and a silver,palladium alloy for inner electrodes, the only currently viable material for the firing temperatures necessary (1100°C). Of special concern was the high content of bismuth in the ceramic since prior investigations suggest that Bi2O3 (as well as various bismuth titanates) used as a fluxor in electroceramics are prone to forming the intermediate-phase bismuth palladate (Bi2PdO4), which can lead to poor contacting and delamination of multilayer stacks. Remarkably, no evidence of bismuth palladate formation could be found. However, the phase relations of the bulk ceramic have proven to be quite complex. Potassium was being drained out of the bulk ceramic either constituting the secondary phase K4Na2(TiO3)3 in unmodified experiments or evaporating and being replaced by silver in samples in contact with Ag. Mechanisms for the formation of these phases or the lack thereof are proposed. These findings were obtained by XRD, TG-DSC, and SEM with EDX, and LA-ICPMS. [source] The Influence of ZnF2 Doping on the Electrical Properties and Microstructure in Bi2O3,ZnO-Based VaristorsJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 1 2010Lihong Cheng ZnO varistors with different amounts of ZnF2 from 0.00 to 0.80 mol% were prepared using a solid-state reaction technique, to explore the potential application of ZnO. The F-doping effects on the microstructure and electrical properties of ZnO-based varistors were investigated. The average grain size of ZnO increased from 4.93 to 6.48 ,m as the ZnF2 content increased. Experimental results showed that as the ZnF2 content increased, the breakdown voltage decreased from 617 to 367 V/mm, and the nonlinear coefficient did not change much. However, a slight increase was observed in the leakage current. Besides, when the ZnF2 content increased, the donor concentration increased from 0.669 × 1018 to 8.720 × 1018 cm,3. The study indicated that ZnF2 played a similar role as sintering aids to promote grain growth and the substitutional F atoms in the bulk served as a donor to increase the donor concentration. [source] Bi2O3,MoO3 Binary System: An Alternative Ultralow Sintering Temperature Microwave DielectricJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 10 2009Di Zhou Preparation, phase composition, microwave dielectric properties, and chemical compatibility with silver and aluminum electrodes were investigated on a series of single-phase compounds in the Bi2O3,MoO3 binary system. All materials have ultralow sintering temperatures <820°C. Eight different xBi2O3,(1,x)MoO3 compounds between 0.2,x,0.875 were fabricated and the associated microwave dielectric properties were studied. The ,-Bi2Mo2O9 single phase has a positive temperature coefficient of resonant frequency (TCF) about +31 ppm/°C, with a permittivity ,r=38 and Qf=12 500 GHz at 300 K and at a frequency of 6.3 GHz. The ,-Bi2Mo3O12 and ,-Bi2MoO6 compounds both have negative temperature coefficient values of TCF,,215 and ,,114 ppm/°C, with permittivities of ,r=19 and 31, Qf=21 800 and 16 700 GHz at 300 K measured at resonant frequencies of 7.6 and 6.4 GHz, respectively. Through sintering the Bi2O3,2.2MoO3 at 620°C for 2 h, a composite dielectric containing both , and , phase can be obtained with a near-zero temperature coefficient of frequency TCF=,13 ppm/°C and a relative dielectric constant ,r=35, and a large Qf,12 000 GHz is also observed. Owing to the frequent difficulty of thermochemical interactions between low sintering temperature materials and the electrode materials during the cofiring, preliminary investigations are made to determine any major interactions with possible candidate electrode metals, Ag and Al. From the above results, the low sintering temperature, good microwave dielectric properties, chemical compatibility with Al metal electrode, nontoxicity and price advantage of the Bi2O3,MoO3 binary system, all indicate the potential for a new material system with ultralow temperature cofiring for multilayer devices application. [source] Phase Relations in the Pyrochlore-Rich Part of the Bi2O3,TiO2,Nd2O3 SystemJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 10 2009pela Kunej In this study we used solid-state synthesis to determine the phase relations in the pyrochlore-rich part of the Bi2O3,TiO2,Nd2O3 system at 1100°C. The samples were analyzed using X-ray powder diffraction and scanning electron microscopy with energy- and wavelength-dispersive spectroscopy. A single-phase pyrochlore ceramic was obtained with the addition of 4.5 mol% of Nd2O3. We determined the solubility limits for the three solid solutions: (i) the pyrochlore solid solution Bi(1.6,1.08x)NdxTi2O(6.4+0.3x), where 0.25 Nanopowder Preparation and Dielectric Properties of a Bi2O3,Nb2O5 Binary System Prepared by the High-Energy Ball-Milling MethodJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 1 2008Di Zhou The high-energy ball-milling (HEM) method was used to synthesize the compositions of BiNbO4, Bi5Nb3O15, and Bi3NbO7 in a Bi2O3,Nb2O5 binary system. Reagent Bi2O3 and Nb2O5 were chosen as the starting materials. The X-ray diffraction patterns of the three compositions milled for different times were studied. Only the cubic Bi3NbO7 phase, Nb2O5, and amorphous matters were observed in powders after being milled for 10 h. After heating at proper temperatures the amorphous matters disappeared and the proleptic phases of BiNbO4 and Bi5Nb3O15 could be obtained. The Scherrer formula was used to calculate the crystal size and the results of nanopowders are between 10 and 20 nm. The scanning electron microscopy photos of Bi3NbO7 powders showed drastic aggregation, and the particle size was about 100 nm. The dielectric properties of ceramics sintered from the nanopowders prepared by HEM at 100,1 MHz and the microwave region were measured. Bi3NbO7 ceramics showed a good microwave permittivity ,r of about 80 and a Q×f of about 300 at 5 GHz. The triclinic phase of BiNbO4 ceramics reached its best properties with ,r=24 and Q×f=14 000 GHz at about 8 GHz. [source] Use of CsCl to Enhance the Glass Stability Range of Tellurite Glasses for Er3+ -Doped Optical Fiber DrawingJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 6 2007Carmen Rosa Eyzaguirre Tellurite glasses are important as a host of Er3+ ions because of their good solubility and because they present broadband optical gain compared with Er3+ -doped silica, with the potential to increase the bandwidth of communication systems. However, the small glass stability range (GSR) of tellurite glasses compromises the quality of the optical fibers. We show that the addition of CsCl to tellurite glasses can increase their GSR, making it easier to draw good-quality optical fibers. CsCl acts like a network modifier in glass systems, weakening the network by forming Te,Cl bonds. We show that the thermal expansion coefficient mismatch is in the right direction for optical fiber fabrication purposes and that the Bi2O3 content can be used to control the refractive index of clad and core glasses. Single-mode and multi-mode Er3+ -doped optical fibers were produced by the rod-in-tube method using highly homogeneous TeO2,ZnO,Li2O,Bi2O3,CsCl glasses. [source] Enhanced Permeability and Dielectric Constant of NiZn Ferrite Synthesized in Nanocrystalline Form by a Combustion MethodJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 5 2007Sasanka Deka The performance parameters of Ni0.5Zn0.5Fe2O4, synthesized in the nanocrystalline form by an autocombustion method, have been investigated. The sample sintered at 1200°C, with Bi2O3 as additive shows a very high value of initial permeability ,,i of >400 at 1 MHz, with low loss. Similarly, a very high dielectric constant is obtained at lower frequencies. The results show that optimum magnetic and electrical properties can be achieved for the NiZn ferrite nanocrystalline powders synthesized by the present autocombustion method and sintered at a relatively lower temperature of 1200°C when compared with a temperature of 1400°C required for the materials synthesized by the conventional ceramic method. [source] Phase Formation and Crystal-Structure Determination in the Bi2O3,TiO2,TeO2 System Prepared in an Oxygen AtmosphereJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 11 2006Marko Udovic Using X-ray diffraction analysis and scanning electron microscopy it was revealed that in an atmosphere of flowing oxygen in the temperature range 700°,800°C, three new compounds are formed in the Bi2O3,TiO2,TeO2 pseudoternary system. These compounds are Bi2Ti3TeO12, Bi2TiTeO8, and Bi6Ti5TeO22, and all the compounds include Te6+. All three crystal structures were solved and refined using X-ray powder diffraction data. Based on the results of the phase formation, a solid-state compatibility diagram is proposed. [source] Low-Fire Processing and Properties of Ferrite+Dielectric Ceramic CompositeJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 9 2006Te-Ming Peng A low-fire Ni,Cu,Zn ferrite+dielectric ceramic composite and its multilayer integrated laminate, which can be densified at temperatures below 900°C, is prepared. To densify Ni,Cu,Zn ferrite at low temperatures, the dielectric needs to contain an effective sintering flux of Bi2O3 or PbO to the Ni,Cu,Zn ferrite. This enables densification of the resulting ceramic composite or multilayer integrated dielectric/ferrite laminate at temperatures close to those of pure ferrite and dielectric. The dielectric constant decreases but the initial permittivity increases with increasing amount of ferrite existing in the ferrite+dielectric ceramic composite. [source] Energy Transfer and Population Inversion in Heavy Metal Oxide Glasses Doped with Tm3+ and Tb3+JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 10 2004Jay Hyok Song Emission properties and energy transfer of PbO,Bi2O3,Ga2O3,GeO2 glasses codoped with Tm3+ and Tb3+ ions were investigated. The 1.48-,m emission due to the Tm3+:3H4,3F4 transition can be used to amplify the S-band (1460,1530-nm) signal light. With Tb3+ addition, the lifetime and emission intensity of the Tm3+:3F4 level decreased sharply via the Tm3+:3F4,Tb3+:7F0,1,2 energy transfer. Population densities of the 3F4 and 3H4 levels in Tm3+ calculated from rate equations clearly verified that population inversion in Tm3+ ions became possible with as little as 0.1 mol% of Tb3+ addition. [source] Microstructure of Varistors Prepared with Zinc Oxide Nanoparticles Coated with Bi2O3JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 4 2004Fangli Yuan Zinc oxide (ZnO) nanoparticles coated with 1,5 wt% Bi2O3 were prepared by precipitating a Bi(NO3)3 solution onto a ZnO precursor. Transmission electron microscopy showed that a homogeneous Bi2O3 layer coated the surface of the ZnO nanoparticles and that the ZnO particle size was ,30,50 nm. Scanning electron microscopy showed that ZnO grains sintered at 1150°C were homogeneous in size and surrounded by a uniform Bi2O3 layer. When the ZnO grains were surrounded fully by Bi2O3 liquid phases, further increases in the ZnO grain size were not affected by the Bi2O3 content. This predesigned ZnO nanoparticle structure was shown to promote homogeneous ZnO grains with perfect crystal growth. [source] Synthesis of Bismuth Sodium Titanate Nanosized Powders by Solution/Sol,Gel ProcessJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 9 2003Chang Yeoul Kim (Bi1/2Na1/2)TiO3 (BNT) is a prominent candidate for a lead-free piezoelectric material. In this study, BNT was synthesized using the solution/sol,gel method, in which a solution of Bi2O3 and Na2CO3 was dissolved in HNO3 as starting materials. The solution then was mixed with ethylene glycol and titanium tetraisopropoxide. The obtained BNT powder was analyzed using FT-IR, DTA-TG, Raman spectroscopy, and high-temperature XRD. Results showed that BNT crystallization occurred above 600°C. TEM investigation showed that 100,200 nm BNT particles were formed by heat-treating the sol,gel-derived BNT sol at 700°C for 6 h. [source] Properties of Ionic-Conducting ,-Bi2O3 Containing Mixed DopantsJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 11 2002Stephen D. Nunn ,-Bi2O3 compositions were prepared to evaluate the effect on properties of using mixed dopants. Baseline compositions containing 28 mol% of the alkaline-earth oxides CaO, SrO, or BaO were used for comparison. When the alkaline earths were combined in pairs to dope the bismuth oxide, the resulting properties were intermediate between the baseline end members. The data suggest that the transformation temperature for forming the high-conductivity ,1 phase can be varied continuously over a temperature range of about 565° to 750°C. Utilization of additional additives having different ionic size or valence charge compared with the alkaline earths resulted in no observed property changes that could be attributed to the additive alone. The most important variables influencing the conductivity level and phase transformation temperature of ,-Bi2O3 were the type and the amount of the alkaline-earth dopant in the composition. [source] Differences in Wetting Characteristics of Bi2O3 Polymorphs in ZnO Varistor MaterialsJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 9 2000Mattias Elfwing Detailed analysis of the microstructure of grain boundaries, especially triple-grain and multiple-grain junctions, in ZnO varistor materials has been performed using transmission electron microscopy. Different polymorphs of Bi2O3 are shown to exhibit different wetting properties on ZnO interfaces. Recent investigations suggest that the equilibrium configuration consists of crystalline Bi2O3 in the triple-grain and multiple-grain junctions and an amorphous bismuth-rich film in the ZnO/ZnO grain boundaries. The present investigation supports this suggestion for ,-Bi2O3 and also adds to the microstructural image and wetting properties of ,-Bi2O3. [source] BGO glasses: structural and optical characterizationPHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 1 2005S. Polosan Abstract Mixtures of 30% Bi2O3 and 70% GeO2 (in molar percents) were prepared followed by the solid state reaction at 700 °C for 30 min. or 24 h using an Al2O3 crucible. After melting at 1050 °C for 10 min. the melt was poured into a preheated graphite plate and then naturally cooled to room temperature (RT). X-ray diffraction measurements (XRD) on the resulting BGO glasses have been performed, and optical absorption spectra recorded at room temperature on the samples obtained using various preparation conditions. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] UV-written channel waveguides in Er3+ -doped Bi2O3 -based glassPHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 2 2004A. Favre Abstract The present paper describes the fabrication of optical channel waveguides in an Er3+ -doped Bi2O3 -based glass using direct laser writing with a UV beam at 244 nm. A buried positive refractive index change was achieved through this method and a description of the observed phenomena is given, based on optical and electron microscopy. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Re-investigation of the structure and crystal chemistry of the Bi2O3,W2O6 `type (Ib)' solid solution using single-crystal neutron and synchrotron X-ray diffractionACTA CRYSTALLOGRAPHICA SECTION B, Issue 2 2010Neeraj Sharma Single crystals of composition Bi35.66W4.34O66.51 (or Bi8.2WO15.3, bismuth tungsten oxide), within the type (Ib) solid-solution region of the Bi2O3,WO3 system, were synthesized using the floating-zone furnace method. Synchrotron X-ray and neutron single-crystal diffraction data were used to confirm the previously tentative assignment of the room-temperature space group as I41. Fourier analysis of the combined X-ray and neutron datasets was used to elucidate and refine fully the cation and anion arrays for the first time. The mixed cation site M1 is shown to be coordinated by eight O atoms in an irregular cube when M = Bi, and by six O atoms in an octahedron when M = W. The resulting disorder in the average structure around M1 is discussed in the context of experimentally observed oxide-ion conductivity. [source] Sm3+ -Doped Bi2O3 Photocatalyst Prepared by Hydrothermal SynthesisCHEMCATCHEM, Issue 4 2009Jakkidi Krishna, Reddy Abstract Bi2O3 and Sm3+ -doped Bi2O3 visible-light-active photocatalysts with different Sm3+ loadings (0.5, 1.0, and 2.0,wt,%) were synthesized by a hydrothermal method. The structural properties of the prepared catalysts were studied by X-ray diffraction (XRD), BET surface area, UV/Vis diffuse reflectance (DRS), FTIR, and X-ray photoelectron (XPS) spectroscopic techniques. The XRD spectra of the Sm-doped Bi2O3 catalysts calcined at 550,°C show only the characteristic peaks of Bi2O3. A high red shift in the range 450,600,nm was detected in the DRS band, leading to a large decrease in the band-gap energy from 2.82 to 2.0,eV. This red shift increased with increasing Sm content. XPS results revealed that Sm interacted with Bi2O3, wherein both Bi and Sm were in the +3 oxidation state. The photocatalytic activities of the catalysts were evaluated for the degradation of methylene blue and phenol under solar irradiation. Of all of the catalysts prepared, the Sm3+ -doped Bi2O3 with a Sm loading of 1,wt,% gave the best photocatalytic activity. [source] MOCVD of BiFeO3 Thin Films on SrTiO3,CHEMICAL VAPOR DEPOSITION, Issue 5 2007J. Thery Abstract Bi-Fe-O thin films are grown by liquid-injection metal-organic (MO)CVD on (001) SrTiO3 substrates using two different bismuth precursors, Bi(tmhd)3 and Bi(mmp)3. The precursor Bi(mmp)3 is found to be more effective for Bi incorporation in the films. Epitaxial BiFeO3 films are obtained and no evidence for secondary phases such as Fe2O3 or Bi2O3 is found by X-ray diffraction (XRD) or transmission electron microscopy (TEM) studies. However, the presence of a multiple binding environment for Fe3+ is shown from the X-ray photoelectron spectroscopy (XPS) analyses. Moreover, XPS shows evidence of a Fe2+/Fe3+ valence mixed state. A saturation magnetization of 70 emu cm,3 is measured. This value is much higher than that reported for the bulk BiFeO3 material. Both the double valence for Fe ions and the enhanced magnetization may originate in the presence of non-fully-oxidized ,-Fe2O3. [source] ChemInform Abstract: Synthesis, Characterization, and Crystallographic Study of the PbO,Bi2O3,V2O5 System: Pb3-xBi2x/3V2O8 (0.20 , x , 0.50).CHEMINFORM, Issue 35 2010Prangya Parimita Sahoo Abstract The new title solid solution is synthesized by solid state reaction of stoichiometric mixtures of PbO, Bi2O3, and V2O5 (650 °C, 2 d). [source] ChemInform Abstract: Magnetic and Crystal Structures of BiCrO3.CHEMINFORM, Issue 34 2010C. Darie Abstract Polycrystalline samples of the title compound are prepared by solid state reaction of Bi2O3 and Cr2O3 (Au capsule, 2 GPa, 805 °C) and characterized by powder neutron diffraction and magnetic susceptibility measurements. [source] The Local Crystal Chemistry and Dielectric Properties of the Cubic Pyrochlore Phase in the Bi2O3,M2+O,Nb2O5 (M2+: Ni2+ and Mg2+) Systems.CHEMINFORM, Issue 51 2007Binh Nguyen Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Phase Formation, Crystal Chemistry, and Properties in the System Bi2O3,Fe2O3,Nb2 O5.CHEMINFORM, Issue 11 2007Michael W. Lufaso Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Phase Formation and Properties in the System Bi2O3:2CoO1+x:Nb2O5.CHEMINFORM, Issue 8 2007Terrell A. Vanderah Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]
| | ||||||||||||||||||||||||