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复合材料由至少为50%(体积)的 Si_3N_4(a)和10～50%(体积)的三元氧化物(b)的混合物配制而成;(b)含有10～30%(分子)TiO_2、10～30%(分子)ZrO_2和至少60%(分子)
The composite material is prepared from a mixture of at least 50% by volume of Si_3N_4 (a) and 10 to 50% by volume of a ternary oxide (b); (b) 10 to 30% 10 to 30% (molecular) ZrO 2 and at least 60% (molecular)