Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 100, Issue 4, Pages 1285-1289Publisher
WILEY
DOI: 10.1111/jace.14743
Keywords
high-pressure synthesis; mayenite; solid solution; total conductivity
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Funding
- Japan Society for the Promotion of Science [24655200]
- Ministry of Education, Culture, Sports, Science, and Technology
- Elemental Strategy Initiative
- Grants-in-Aid for Scientific Research [16K14395, 24655200, 25106006] Funding Source: KAKEN
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Solid solutions of 12CaO7Al(2)O(3) (C12A7) and 12SrO7Al(2)O(3) (S12A7) crystals were synthesized under high pressure. X-ray diffraction patterns revealed that the lattice constants of the synthesized samples depend linearly on the compositional ratio of C12A7 and S12A7. Electron-probe X-ray microanalyses show that the chemical compositions of the crystals are represented by xC12A7(1-x)S12A7 (0<1). These results indicate that the variation in the lattice constants is originated from a difference in the ionic radii of Ca2+ and Sr2+ ions. From impedance measurements, it was found that S12A7 has the highest conductivity (similar to 1x10(-3)Scm(-1) at 550 degrees C) among the solid solutions in the C12A7-S12A7 system.
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