【摘要】 研究了Ｓｉ_３Ｎ_４含量和相对密度对Ｓｉ_３Ｎ_４颗粒增强ＳｉＯ_２基复合材料的介电性能的影响。结果表明：在Ｓｉ_３Ｎ_４含量相同时，随着相对密度的增大，复合材料的介电常数增大，介电损耗减少；在一定的相对密度下，复合材料的介电常数和介电损耗随Ｓｉ_３Ｎ_４含量的增加而增大。更多还原

【Abstract】 The influence of Si₃N₄ content and relative density on dielectric properties of SiO₂-Si₃N₄ composites was studied.It is found that in the same Si₃N₄ content, dielectric constant of the composites is increased and loss tangent is reduced when the relative density of the composites is increased;in a range of relative density, dielectric constant and loss tangent of the composites are increased when the Si₃N₄ content is increased.更多还原