摘要
以铁尾矿微粉、铝粉、氧化铝为主要原料,采用固相烧结法制备莫来石复相陶瓷材料。通过X射线衍射(XRD)、傅里叶红外光谱(FTIR)和扫描电镜(SEM)、万能试验机、阿基米德排水法等研究了配铝系数(0.90~2.10)、烧结温度(1100~1300℃)两个因素对莫来石复相陶瓷材料的微观组织、抗压强度、气孔率、体积密度的影响。结果表明,所制备的样品均为莫来石-石英复相陶瓷;配铝系数和烧结温度增加均可提高陶瓷材料中莫来石含量,且后者的影响较大;莫来石复相陶瓷试样的最佳制备工艺为烧结温度为1250℃,配铝系数为2.10,此条件下所制得的莫来石复相陶瓷材料的莫来石晶须更长且更完整,气孔率为13.40%,抗压强度为112.12 MPa。
Mullite composite ceramic materials were prepared by solid-phase sintering method with micronized iron tailings,aluminum powders and alumina oxide as main raw materials.The effects of aluminum distribution coefficient(0.90-2.10)and sintering temperature(1100-1300℃)on the microstructure,compressive strength,porosity,volume density of mullite composite ceramic materials were studied by XRD,FT-IR and SEM,as well as the universal testing machine and Archimedes drainage method.The results showed that the samples prepared were all mullite-quartz composite ceramic materials;The content of mullite in ceramic materials was increased with the increase of the aluminum distribution coefficient and sintering temperature,and the sintering temperature had a greater impact.The best preparation processes for mullite composite ceramic specimens were as follows:the sintering temperature was 1250℃,the aluminum distribution coefficient was 2.10,the mullite whisker of the prepared mullite multiphase ceramic material was longer and more complete,its porosity was 13.40%and its compressive strength was 112.12 MPa.
作者
代卫丽
朱程程
陈鹏飞
李峰
宋月红
刘彦峰
Dai Weili;Zhu Chengcheng;Chen Pengfei;Li Feng;Song Yuehong;Liu Yanfeng(Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo,Shaanxi 726000;Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo University,Shangluo,Shaanxi 726000;School of Materials Science and Engineering,Xi’an University of Technology,Xi’an,Shaanxi 710048)
出处
《非金属矿》
北大核心
2023年第2期47-52,共6页
Non-Metallic Mines
基金
陕西省教育厅重点科研计划(19JS026)
陕西省自然科学基础研究计划(2019JQ-156)
商洛市高性能有色金属制备与加工技术创新团队(SK2019-75)
商洛学院博士科研项目(17SKY019)。
关键词
铁尾矿
莫来石复相陶瓷
配铝系数
烧结温度
组织及性能
iron tailings
mullite complex phase ceramics
aluminum distribution coefficient
sintering temperature
microstructure and properties
