Microstructure and Electrical Properties of BaTiO3-Based PTC Ceramics Prepared from Nanopowders

Abstract:

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Dense PTC ceramics were prepared with BaTiO3 nanopowders synthesized by hydrothermal method. BaCO3 and Ti(OC4H9)4 were used as barium and titanium sources, and Y(NO)3·6H2O as the donor dopant respectively. The average grain size of the powders obtained after hydrothermal treatment at 160°C for 9h was about 30nm with cubic structure. Mn(NO3)2 was introduced to the as-prepared nanopowders in order to improve the PTC effect. After sintered at 1280°C, the PTC ceramic samples exhibited sufficient resistance jump ratio(1.086×103) around Curie temperature, the density of which was 5.81g/cm3(96.5% of the theoretical density).

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong

Pages:

456-458

DOI:

10.4028/www.scientific.net/KEM.368-372.456

Citation:

H. Liu et al., "Microstructure and Electrical Properties of BaTiO3-Based PTC Ceramics Prepared from Nanopowders", Key Engineering Materials, Vols. 368-372, pp. 456-458, 2008

Online since:

February 2008

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$35.00

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