Kucheiko, S Choi, JW Kim, HJ Jung, HJ 2024-01-21T19:13:17Z 2024-01-21T19:13:17Z 2021-09-04 1996-10 0002-7820 https://pubs.kist.re.kr/handle/201004/144297 The microwave dielectric properties of CaTi1-x(Al1/2Ta1/2)(x)O-3 solid solutions (0.3 less than or equal to x less than or equal to 0.5) have been investigated. The ceramic samples had perovskite structures similar to CaTiO3,. The partial substitution of Ti4+ by a coupled Al3+/Ta5+ permitted improvement of the quality factor e. The dielectric constant (epsilon(r)) and temperature coefficient of resonant frequency (tau(f)) decrease rapidly with an increase of x. A new high-quality microwave dielectric material was found at x = 0.46 with epsilon(r) = 46.5, Q . f = 27300 GHz, and tau(f) = 0 ppm/degrees C. The relationship between microstructures and dielectric properties is presented. English AMER CERAMIC SOC COMPLEX PEROVSKITE FREQUENCIES CONSTANT CA Microwave dielectric properties of CaTiO3-Ca(Al1/2Ta1/2)O-3 ceramics Article 1 JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.79, no.10, pp.2739 - 2743 JOURNAL OF THE AMERICAN CERAMIC SOCIETY 79 10 2739 2743 scie scopus A1996VP02100031 2-s2.0-0030263162 Materials Science, Ceramics Materials Science Article COMPLEX PEROVSKITE FREQUENCIES CONSTANT CA