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Phase Diagram (phase + diagram)

Distribution by Scientific Domains
Chemistry49%
Polymers and Materials Science24%
Physics and Astronomy12%
Earth and Environmental Science7%
Medical Sciences2%
3 Other Domains6%
Distribution within Chemistry
Organic Chemistry36%
Chemical Engineering18%
Crystallography12%
11 Other Subdomains34%

Kinds of Phase Diagram

  • equilibrium phase diagram
    		•
  • ternary phase diagram
    		•

    Selected Abstracts

    Reactivity in LaGaO3/Ni and CeO2/Ni Systems

    FUEL CELLS, Issue 2 2006
    N. Solak
    Abstract The reactivity in CeO2/Ni and LaGaO3/Ni systems, which are constituents of intermediate temperature solid oxide fuel cell (IT-SOFC) anodes, has been investigated both computationally and experimentally. The CALPHAD-method (CALculating of PHAse Diagrams), employing BINGSS and THERMOCALC software, was used to obtain a self-consistent set of Gibbs energy functions describing the systems. Interactions in the LaGaO3/Ni system were predicted using a thermodynamic database developed for the La-Ga-Ni-O system. Similarly, to analyze the CeO2/Ni system, the Ce-Ni-O ternary phase diagram was calculated using known thermodynamic data for binary Ce-O, Ni-O, and Ce-Ni systems. The experimental work was designed based on the calculated phase diagrams. While the La-Ga-Ni-O system experiments were conducted in air, the Ce-Ni-O system was also investigated in a reducing atmosphere. The calculated Ce-Ni-O diagram is in good agreement with the experimental results. It has been found that NiO does not react with CeO2. Extended solid solutions of La(Ga,Ni)O3, La2(Ni,Ga)O4, and La4(Ni,Ga)3O10 were found in the La-Ga-Ni-O system. Additionally, the compound LaNiGa11O19, with magnetoplumbite-type structure, has been found, which has not been reported in the literature so far. It is concluded that La2NiO4 is not chemically compatible, as a cathode material, with the LSGM electrolyte. [source]

    Binary Phase Diagram of the Manganese Oxide,Iron Oxide System

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 10 2009
    Jarrod V. Crum
    The phase equilibrium of the MnOx,FeOy binary system was measured within a temperature range of 750°,1590°C in air to examine inconsistencies found in literature, i.e., discrepancies related to the boundary between the spinel and hausmannite+spinel phase fields. Several studies are available in the literature that describe this boundary however the results and methods by which they were studied vary namely in terms of the atmosphere (air versus reducing) used and heat treatment/analysis methods. In addition, samples in the discrepancy region of the diagram revert to the hausmannite phase spontaneously upon cooling due to a displacive transformation. In order to accurately measure the phase boundaries, the following measurement methods were used: isothermal heat treatments followed by rapid quenching (in air or water), dilatometry, differential thermal analysis with thermogravimetric analysis, as well as room temperature and hot-stage X-ray diffraction (XRD). Phase assemblage(s) in each specimen were determined by XRD. Data were compared with literature and a new, self consistent phase diagram was developed. The results are reported along with background information and a comparison with previously reported data. This study will support development of a model for thermodynamic equilibria in complex, multioxide silicate melts. [source]

    Thermodynamic Properties and Phase Diagram for the System MoO2,TiO2

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 2 2008
    K. Thomas Jacob
    The activity of molybdenum dioxide (MoO2) in the MoO2,TiO2 solid solutions was measured at 1600 K using a solid-state cell incorporating yttria-doped thoria as the electrolyte. For two compositions, the emf was also measured as a function of temperature. The cell was designed such that the emf is directly related to the activity of MoO2 in the solid solution. The results show monotonic variation of activity with composition, suggesting a complete range of solid solutions between the end members and the occurrence of MoO2 with a tetragonal structure at 1600 K. A large positive deviation from Raoult's law was found. Excess Gibbs energy of mixing is an asymmetric function of composition and can be represented by the subregular solution model of Hardy as follows The temperature dependence of the emf for two compositions is reasonably consistent with ideal entropy of mixing. A miscibility gap is indicated at a lower temperature with the critical point characterized by Tc (K)=1560 and. Recent studies indicate that MoO2 undergoes a transition from a monoclinic to tetragonal structure at 1533 K with a transition entropy of 9.91 J·(mol·K),1. The solid solubility of TiO2 with rutile structure in MoO2 with a monoclinic structure is negligible. These features give rise to a eutectoid reaction at 1412 K. The topology of the computed phase diagram differs significantly from that suggested by Pejryd. [source]

    Modified Phase Diagram for the Barium Oxide,Titanium Dioxide System for the Ferroelectric Barium Titanate

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 8 2007
    Soonil Lee
    The ferroelectric phase transition behavior in BaTiO3 was investigated for various annealing times, temperatures, and Ba/Ti ratios by means of a differential scanning calorimeter. Coupling these observations with powder X-ray diffraction and transmission electron microscopy allowed new insights into the barium oxide (BaO),titanium dioxide (TiO2) phase diagram. The transition temperature was varied systematically with the Ba/Ti ratio at annealing temperatures from 1200° to 1400°C in air. The transition temperature decreased with increasing concentrations of BaO and TiO2 partial Schottky defects, and showed a discontinuous change at the phase boundaries. Beyond the solubility region, two peritectoid reactions were confirmed and revised; first around 1150°C for Ba1.054Ti0.946O2.946,Ba2TiO4+BaTiO3 and second 1250°C for BaTi2O5,Ba6Ti17O40+BaTiO3, respectively. All other regimes of the BaO,TiO2 were found to be consistent with the reported diagrams in the literature. [source]

    ChemInform Abstract: A Revision of the Central Part of the Cr,Ge Phase Diagram.

    CHEMINFORM, Issue 36 2010
    Isabella Jandl
    Abstract The reinvestigation of the Cr,Ge phase diagram by XRD, DTA, and chemical vapor transport experiments does not show a polymorphic phase transformation for Cr5Ge3 as previously reported. [source]

    ChemInform Abstract: Phase Diagram of the La,Si Binary System under High Pressure and the Structures of Superconducting LaSi5 and LaSi10.

    CHEMINFORM, Issue 45 2009
    Shoji Yamanaka
    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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: An Investigation of the Al,Pd,Ir Phase Diagram Between 50 and 100 at.% Al.

    CHEMINFORM, Issue 25 2008
    D. Pavlyuchkov
    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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    Phase Diagram for the Na2O,Al2O3,H2O System at 130 °C.

    CHEMINFORM, Issue 17 2007
    Shuhua Ma
    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]

    Isothermal Section of the Fe,Pt,Nd Phase Diagram at 900 °C.

    CHEMINFORM, Issue 51 2006
    Chengfu Xu
    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]

    Experimental Investigation of the Al,Y Phase Diagram

    CHEMINFORM, Issue 26 2006
    Shuhong Liu
    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]

    X-Ray Powder Diffraction Refinement of Ag2In2SiSe6 Structure and Phase Diagram of the AgInSe2,SiSe2 System.

    CHEMINFORM, Issue 26 2006
    I. D. Olekseyuk
    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]

    NaNO2 + NaNO3 Phase Diagram: New Data from DSC and Raman Spectroscopy.

    CHEMINFORM, Issue 15 2006
    Rolf W. Berg
    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]

    The 673 and 1123 K Isothermal Sections (Partial) of the Phase Diagram of the Ce,Mg,Ni Ternary System.

    CHEMINFORM, Issue 13 2006
    Huaiying Zhou
    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]

    P,T Phase Diagram and Single Crystal Structural Refinement of NaMn7O12.

    CHEMINFORM, Issue 37 2005
    Edmondo Gilioli
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]

    Phase Diagram of the Tb,Ni Binary System.

    CHEMINFORM, Issue 34 2005
    Qingrong Yao
    No abstract is available for this article. [source]

    An Investigation of the Al,Pd,Fe Phase Diagram Between 50 and 100 at.% Al: Reaction Scheme.

    CHEMINFORM, Issue 32 2005
    S. Balanetskyy
    No abstract is available for this article. [source]

    Equilibrium Phase Diagram of the Ag,Au,Pb Ternary System.

    CHEMINFORM, Issue 25 2005
    S. Hassam
    No abstract is available for this article. [source]

    The 773 and 1123 K Isothermal Sections of the Phase Diagram of the Mg,Ni,Pr Ternary System.

    CHEMINFORM, Issue 13 2005
    Huaiying Zhou
    No abstract is available for this article. [source]

    Magnetic Phase Diagram of the Intermetallic LaMn2-xCuxSi2 Silicides.

    CHEMINFORM, Issue 48 2004
    A. Kilic
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]

    Revised Phase Diagram for the Pt,Ti System from 30 to 60 at.% Platinum.

    CHEMINFORM, Issue 37 2004
    T. Biggs
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]

    Experimental Determination of the H2SO4/HNO3/H2O Phase Diagram in Regions of Stratospheric Importance.

    CHEMINFORM, Issue 15 2004
    Keith D. Beyer
    No abstract is available for this article. [source]

    Isothermal Sections of the Al-Rich Part on the Al,Ni,Ru Phase Diagram

    CHEMINFORM, Issue 46 2003
    S. Mi
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]

    Phase Diagram of the CuInS2,ZnS System and Some Physical Properties of Solid Solutions Phases.

    CHEMINFORM, Issue 12 2003
    O. V. Parasyuk
    No abstract is available for this article. [source]

    Subsolidus Relations in the BaO,La2O3,V2O5 Phase Diagram.

    CHEMINFORM, Issue 5 2003
    M. G. Skellern
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]

    Isothermal Sections (400 and 550 °C) of the Phase Diagram of the La,Ni,Fe Ternary System.

    CHEMINFORM, Issue 3 2003
    Huaiying Zhou
    No abstract is available for this article. [source]

    ChemInform Abstract: Phase Diagram of the Quasi-Binary Cu2GeS3,HgS System and Crystal Structure of the LT-Modification of the Cu2HgGeS4 Compound.

    CHEMINFORM, Issue 18 2002
    O. V. Parasyuk
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Differential Scanning Calorimetric Studies on the Phase Diagram of the Binary LiCl,CaCl2 System.

    CHEMINFORM, Issue 44 2001
    K. H. Mahendran
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Phase Diagram of the System Na3AlF6,NaF,Na2SO4.

    CHEMINFORM, Issue 17 2001
    V. Danielik
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Phase Diagram of the Ca,Sn System.

    CHEMINFORM, Issue 16 2001
    A. Palenzona
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    Phase Diagrams and Glass Formation in Metallic Systems,

    ADVANCED ENGINEERING MATERIALS, Issue 6 2007
    M. Baricco
    Abstract The basic thermodynamic aspects of glass-formation in metallic systems are reviewed. In particular, the specific features of a phase diagram with respect to glass-formation are evidenced. On the basis of the regular solution model, the effect of various thermodynamic quantities on the free energy difference between undercooled liquid and crystal phases are outlined. In order to describe the amorphous phase, a specific heat difference between liquid and solid phases in the undercooling regime is introduced in the CALPHAD assessment of various binary systems. The glass-transition is described as a second order transition. Examples are given for different systems, including Fe-B and Cu-Mg. From the description of the free energy of various phases as a function of composition and temperature, the driving forces for nucleation of crystal phases and the T0 curves are estimated. [source]