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JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS
Volume 44, Issue 2, Pages 961-963Publisher
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.44.961
Keywords
rare-earth aluminate; perovskite; ceramics; dielectric property
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Cerium monoaluminate (CeAlO3) ceramics were synthesized at 1350-1500 degrees C in a reducing atmosphere with H3BO3 as flux and characterized of their structural and electric properties. Pellets of such ceramics, sintered at 1400 degrees C or above, showed a perovskite-like tetragonal structure with a density higher than 92% of its theoretical. These ceramic pellets were found to have a large dielectric constant higher than 600 and a small loss tangent lower than 0.04 in the frequency range of 10 kHz to 10 MHz. This sample also showed an electric conductivity of 4.71 x 10(-9) S/cm and an optical bandgap width of 3.29 eV at room temperature.
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