Choi, JW Yoon, SJ Kim, HJ Yoon, KH 2024-01-21T10:36:53Z 2024-01-21T10:36:53Z 2021-09-01 2002-06 0021-4922 https://pubs.kist.re.kr/handle/201004/139505 The microwave and structural characteristics of (1 - x)(Al1/2Ta1/2)O-2-xTiO(2) (0 < x < 0.5) ceramics were investigated. (Al12Ta1/2)O-2 and TiO2 had orthorhombic and tetragonal structure. respectively, As TiO2 concentration increased, (1 - x)(Al1/2Ta1/2)O-2-xTiO(2) transformed to tetragonal structure. Specimens having a tetragonal single phase could he obtained for x greater than or equal to 0.15. As TiO2 concentration increased, the grain size. dielectric constant (epsilon(r)) significantly increased, and the temperature coefficient of resonant frequency (tau(f)) changed from negative to positive value. However. quality factor (Q) increased within limited values. A tau(f) of 0 ppm/degreesC was realized at x = 0.2 and the epsilon(r) and Q.f(0) value for this Composition were 29.4 and 75470 GHz, respectively. The relationship between microstructures and dielectric properties was also investigated. English INST PURE APPLIED PHYSICS RESONATOR Microwave dielectric characteristics of (1-x)(Al1/2Ta1/2)O-2-xTiO(2) ceramics Article 10.1143/JJAP.41.3804 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, v.41, no.6A, pp.3804 - 3807 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 41 6A 3804 3807 scie scopus 000177169500037 Physics, Applied Physics Article RESONATOR microwave dielectric materials dielectric constant quality factor temperature coefficient of resonant frequency tetragonal structure