AlN/玻璃复合材料的低温烧结和性能

Sintering at low temperature and performance for A1N/glass composites

用热压方法在850～1000℃制备出低温烧结AlN/硼硅酸盐玻璃复合材料。研究了玻璃的高温行为及其对AlN的润湿能力,分析了颗粒配比对复合材料烧结致密化的影响,探讨了影响复合材料热导率的因素。结果表明:引入对AlN润湿良好的硼硅酸盐玻璃,可将烧结温度降低到1000℃以下;采用适当的AlN和玻璃粉体的粒径比有利于提高复合材料的烧结致密化程度。具有均匀显微结构的低温烧结AlN/玻璃复合材料具有良好的导热性能,其热导率高于10W/(m·K)。

AlN/borosilicate glass composites were fabricated through hot-press sintering at low temperature (850-1000°C). The high temperature behavior of AlN/borosilicates glass, the glass wetting ability of AlN and the particle size of the AlN powders were investigated. The results show that AlN/glass composites were sintered at low temperature by introducing a low soften point borosilicate glass; increasing particle size of AlN decreased the content of glass and accelerated densification of the composites. The thermal conductivity of hot-pressed composites with uniform microstructure was as high as 10 W/(W&middotK).