为了回收利用废弃陶瓷材料，节约资源，以废弃陶瓷材料为主要原料，加入不同量的黏土（质量分数分别为15％、25％、35％），外加锯末和结合剂，经混料、成型、烘干后，1200、1250、1300、1350、1400℃保温3 h热处理，然后检测试样的物理性能，并进行了物相和显微结构分析。结果表明，当废弃陶瓷材料与黏土的质量比为8515，烧成温度为1400℃时，试样的综合性能最优；由于热处理过程中发生了莫来石化，试样中的主要物相为莫来石；1400℃热处理后试样的孔隙直径比1200℃的大，基质结构也更加致密，由K2 O、SiO2、Al2 O3组成的液相也较多，因而使材料的强度增大。
In order to recycle ceramics wastes and save resources,mullite specimens were prepared using ceramics wastes as main starting materials,adding 15%,25% or 35% (in mass,the same hereinafter)of clay,extra-adding saw powder and binder,mixing,molding,drying,and hot treating at 1 200,1 250,1 300, 1 350 and 1 400 ℃ for 3 h,respectively.The physical properties of specimens were determined,the phase compositions and microstructure were analyzed.The results show that:the specimens have the best prop-erties with the mass ratio of ceramics wastes over clay of 85 15 and hot treated temperature of 1 400℃;the main phase of specimens is mullite because of the mullitization during the heat treatment;compared with the specimen treated at 1 200 ℃,that treated at 1 400 ℃ has larger pore diameter,denser matrix structure, and more liquid phase composed of K2 O,SiO2 and Al2 O3 ,therefore the strength improves.
参考文献
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