成型压力对莫来石晶须增强磷酸铬铝基复合材料性能的影响  

The Effects of Molding Pressure on Mullite Whisker Reinforced Aluminum Chromium Phosphates Multiphase Ceramics

作　　者：王健[1] 陈宁[2,3] 霍冀川[1] 何艳[1] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室,绵阳621010 [2]绵阳师范学院化学与化工学院,绵阳621000 [3]中国建筑材料科学研究总院,北京100024

出　　处：《中国陶瓷》2015年第5期14-17,共4页China Ceramics

基　　金：国家863计划重点项目(2009AA035002);四川省教育厅重点项目(10ZA061);四川省教育厅一般项目(13ZB0117)

摘　　要：以磷酸铬铝粘结剂、熔融石英、氢氧化铝、氟化铝为原料,制备以固相烧结莫来石及原位生长莫来石晶须为增强体的磷酸铬铝基复合材料。本文主要研究了烧结工艺过程中不同坯体成型压力对莫来石晶须生长和烧成制品结构、机械性能及介电性能的影响。进行的分析测试有:XRD、SEM、线性收缩、维氏硬度、介电常数等。结果表明:随成型压力增大,制品内部孔隙率降低,线性收缩减小,介电常数、抗弯强度及维氏硬度均随之增大。合理调控原料配方比例与烧结工艺可改善制品材料综合性能以应对不同需求。In-situ mullite and mullite whisker reinforced aluminum chromium phosphates multiphase ceramics were prepared by aluminum chromium phosphates binder, fused silica, aluminium hydroxide and aluminium fluoride. The thesis studies the effects of different sintering process of molding pressure on mullite whisker growth, sintering products structure, mechanical properties and dielectric properties. The main analytical and test methods are: XRD, SEM,, linear shrinkage, Vickers hardness, dielectric constant. The results show that: with increasing molding pressure, the internal porosity reduces, linear shrinkage decreases, but permittivity, bending strength and Vickers hardness increases. Reasonable formula and sintering process can improve many properties to cope with different needs.

关 键 词：成型压力 莫来石晶须 磷酸铬铝 介电常数 弯曲强度 

分 类 号：TQ174.758.22[化学工程—陶瓷工业]