期刊
INTERNATIONAL JOURNAL OF INORGANIC MATERIALS
卷 3, 期 7, 页码 709-714出版社
ELSEVIER SCI LTD
DOI: 10.1016/S1466-6049(01)00187-8
关键词
strontium lead titanate; DC bias; field dependence; dielectric constant; transition temperatures; tunability
(Sr1-xPbx)TiO3 (x=0.2, 0.25 and 0.3) ceramics were prepared by the conventional mixed oxide method. Their dielectric permittivity, and loss tangent values were measured with and without DC bias field, thermal expansion and microstructure were observed. Three kompositions showed similar Curie-Weiss constant, ca. 1 x 10(5 degrees)C and thermal expansion coefficient, 10x10(-6 degrees)C. Transition temperatures of the compositions were, -60, -25 and 10 degreesC, respectively, with loss tangent values of less than 0.1% measured at room temperature and at 10 kHz. Dielectric tunabilities of, 3, 15, and 70% were measured on x=0.2, 0.25 and 0.3 under 20 kV/cm bias field at 10 kHz and at room temperature. (C) 2001 Published by Elsevier Science Ltd.
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