Low-Temperature Sintering of Negative--Positive-Zero-Type Temperature-Stable Ceramics with ZnO--B₂O₃ Flux and SrCO₃ Additive

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概要

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• To demonstrate that tungsten--bronze-based NP0 (negative--positive zero, also called C0G) specification ceramics can be sintered at a low temperature to reduce the cost of capacitor production, systematic investigation has been performed on the structure and dielectric properties of such ceramics doped with SrCO₃ in various amounts and ZnO--B₂O₃ powders of different compositions as sintering aids. A novel dielectric ceramic material with good permittivity, low dielectric loss, and a near-zero temperature coefficient was obtained at a sintering temperature of 900 °C, meeting NP0 specifications. The analysis reveals the pyrochlore phase formation of the low-temperature-fired ceramics with no SrCO₃ addition, which verifies the beneficial role of Sr in facilitating the production of pure phases. The results also suggest that the ceramics serve as a promising candidate for fabricating inexpensive multilayer capacitors with pure Ag as the inner electrode.

• 2011-08-25

著者

• Ji An

  State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

• Li Longtu

  State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

• Wang Xiaohui

  State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

• Sun Changku

  State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

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