4.7 Article

Dielectric properties of silicon nitride ceramics produced by free sintering

期刊

CERAMICS INTERNATIONAL
卷 43, 期 11, 页码 8284-8288

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ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.03.161

关键词

Silicon nitride; Dielectric losses; Sintering

资金

  1. RFBR [16-32-00430 mol_a]

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The silicon nitride ceramics with a beneficial combination of low dielectric losses and improved physical properties was fabricated by cold isostatic pressing and pressureless sintering. The fine grain microstructure, three-phase composition based on the beta-SiAlON, the small amount of the glass phase and relatively small porosity promote a unique combination of a low thermal conductivity 14.51 W m(-1) K-1 and low dielectric loss 1.4.10(-3). A novel method is proposed to overcome the main drawbacks of the commercial and high-cost technologies.

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