Kucheiko, S Yeo, DH Choi, JW Yoon, SJ Kim, HJ 2024-01-21T10:41:07Z 2024-01-21T10:41:07Z 2021-09-05 2002-05 0002-7820 https://pubs.kist.re.kr/handle/201004/139581 The microwave dielectric properties of CaTi1-x(Al1/2Nb1/2)(x)O-3 solid solutions (0.3 less than or equal to x less than or equal to 0.7) have been investigated. The sintered samples had perovskite structures similar to CaTiO3. The substitution of Ti4+ by Al3+/Nb5+ improved the quality factor Q of the sintered specimens. A small addition of Li3NbO4 (about 1 wt%) was found to be very effective for lowering sintering temperature of ceramics from 1450-1500degrees to 1300degreesC. The composition with x = 0.5 sintered at 1300degreesC for 5 h revealed excellent dielectric properties, namely, a dielectric constant (epsilon(r)) of 48, a Q X f value of 32 100 GHz, and a temperature coefficient of the resonant frequency (tau(f)) of -2 ppm/K. Li3NbO4 as a sintering additive had no harmful influence on tau(f) of ceramics. English AMER CERAMIC SOC FREQUENCIES Microwave dielectric properties of CaTiO3-CaAl1/2Nb1/2O3 ceramics doped with Li3NbO4 Article 1 JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.85, no.5, pp.1327 - 1329 JOURNAL OF THE AMERICAN CERAMIC SOCIETY 85 5 1327 1329 scie scopus 000175788400056 2-s2.0-0036572557 Materials Science, Ceramics Materials Science Article FREQUENCIES dielectric constant