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2002•JOURNAL OF INFRARED AND MILLIMETER WAVESRequires access

Ba_(0.65)Sr_(0.35)TiO_3 PYROELECTRIC CERAMICS PREPARED BY MICROWAVE SINTERING

Yangping Wen

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Abstract

The Ba 0.65 Sr 0.35 TiO 3 ceramic materials were prepared by sol gel processing and microwave sintering, and their dielectric properties and pyroelectric properties were studied and compared with the same componential material prepared by conventional processing. The experimental results showed that the synthetic temperature of the BST powder can be reduced from 1100℃ to 900℃, and the BST ceramic with fine grains(～1μm)can be obtained at 1310℃ for 25 min by microwave sintering. In comparison of conventional ceramics, by this method, the relative dielectric constant and pyroelectric coefficient of the BST sample change slightly while the dielectric loss reduces greatly; thereby the pyroelectric figure of merit is increased to two times of the conventional materials.

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What this paper is about

The Ba 0.65 Sr 0.35 TiO 3 ceramic materials were prepared by sol gel processing and microwave sintering, and their dielectric properties and pyroelectric properties were studied and compared with the same componential material prepared by conventional processing. The experimental results showed that the synthetic temperature of the BST powder can be reduced from 1100℃ to 900℃, and the BST ceramic with fine grains(～1μm)can be obtained at 1310℃ for 25 min by microwave sintering. In comparison of conventional ceramics, by this method, the relative dielectric constant and pyroelectric coefficient of the BST sample change slightly while the dielectric loss reduces greatly; thereby the pyroelectric figure of merit is increased to two times of the conventional materials.

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Available abstract

The Ba 0.65 Sr 0.35 TiO 3 ceramic materials were prepared by sol gel processing and microwave sintering, and their dielectric properties and pyroelectric properties were studied and compared with the same componential material prepared by conventional processing. The experimental results showed that the synthetic temperature of the BST powder can be reduced from 1100℃ to 900℃, and the BST ceramic with fine grains(～1μm)can be obtained at 1310℃ for 25 min by microwave sintering. In comparison of conventional ceramics, by this method, the relative dielectric constant and pyroelectric coefficient of the BST sample change slightly while the dielectric loss reduces greatly; thereby the pyroelectric figure of merit is increased to two times of the conventional materials.

Key concepts: Pyroelectricity, Materials science, Sintering, Ceramic, Dielectric, Figure of merit, Microwave, Composite material

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Ba_(0.65)Sr_(0.35)TiO_3 PYROELECTRIC CERAMICS PREPARED BY MICROWAVE SINTERING — Research Paper | ScholarLens