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Meeting MS&T23: Materials Science & Technology
Symposium Phase Transformations in Ceramics: Science and Applications
Presentation Title Crystal Structure Solution and Phase Transformations of CaZr4(PO4)6 and SrZr4(PO4)6
Author(s) Benjamin Hulbert, Julia Brodecki, Waltraud M. Kriven
On-Site Speaker (Planned) Benjamin Hulbert
Abstract Scope The NaZr2P3O12 (NZP) family of materials have shown promising low thermal expansion properties which can be tailored based on the ability to incorporate a wide range of cations in its structure. Novel high-temperature polymorphs of CaZr4(PO4)6 and SrZr4(PO4)6 were solved by Fourier difference mapping and Rietveld refinement. The phase transformation from R-3 to R-3c was measured on heating between 1100 and 1200 ℃ for both compositions. The thermal expansion of these materials was lowest at 25 ℃, then increased for all samples. SrZr4P6O24 shows greater anisotropy in thermal expansion in the high temperature R-3c phase than in the low temperature R-3 phase. This work provides new thermal expansion data from 500 to 1500 ℃ for all samples. Crystalline powder samples were synthesized using the organic-inorganic steric entrapment method. The samples were characterized with in-situ high temperature, x-ray diffraction at the APS (17-BM-B), from 25℃ to 1500 ℃.


Computational Study of Site-disordered AgSbI4
Crystal Structure Solution and Phase Transformations of CaZr4(PO4)6 and SrZr4(PO4)6
Effect of Cations Decoration on Ti3C2Tx MXene, its Stability and Phase Transformation at High Temperatures
Elevated Temperature Phase Control of Two-dimensional Mo2TiC2Tx Carbide Through Defect Engineering
Enhancing Oxidation Resistance of Silicon Nitride Using Ca2+ Stabilizer
Microstructural Evolution and Associated Kinetics of Seeded Solid State Single Crystal Growth of CoTi2O5
Phase Stability and Cation Partitioning in Multi-rare Earth Aluminates and Zirconates
Phase Transformations in Ceramic Materials under Extreme External Forcing
Progress on Phase Stability of Substituted Rare Earth Disilicate Compositions for Environmental Barrier Coatings
Spinodal Decomposition in Ferroelectric Crystals
Structural Evolution of MgAl2O4 and NiAl2O4 Disordered Spinel Oxides Studied via In Situ Neutron Total Scattering
Using Total Scattering Techniques to Explore Fundamental Aspects of the Structural Organization in Weberite-type Tantalate Oxides

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