(1-x)CaTiO3-x(Li1/2Sm1/2)TiO3 microwave dielectric ceramics were prepared by solid sate reaction technique. The crystal structure, sintering properties and microwave dielectric properties of the ceramics were investigated. The results show that a single orthorhombic perovskite structure forms in the x range from 0.1 to 0.9; the best sintering temperatures of (1-x)CaTiO3-x(Li1/2Sm1/2)TiO3 are 1250℃ and 1300℃ in the x range from 0.1 to 0.5 and 0.6 to 0.9, respectively; the dielectric constant εr, the product of quality factor and resonance frequency (Qf ) value and the temperature coefficient of resonant frequency τf decrease with the increasing of x. The Ca0.3(Li1/2Sm1/2)0.7TiO3 ceramic sintered at 1300℃ for 5h exhibits excellent microwave dielectric properties: εr=116.5, Qf=3254GHz, τf=42.43×10-6/℃.
LI Yue-Ming
,
SONG Ting-Ting
,
HU Yuan-Yun
,
PENG Hao
,
LIU Wei-Liang
. Study on the Microwave Dielectric Properties of (1-x)CaTiO3-x(Li1/2Sm1/2)TiO3 Ceramics[J]. Journal of Inorganic Materials, 2008
, 23(4)
: 695
-699
.
DOI: 10.3724/SP.J.1077.2008.00695
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