摘要
以煤矸石和铝矾土为原料,空心玻璃微珠为造孔剂,采用压制成型烧结制备多孔莫来石陶瓷。研究空心玻璃微珠添加量和烧结温度对物相组成、显微结构、抗弯强度和耐酸碱腐蚀性能的影响。结果表明:提高空心玻璃微珠添加量可以增大多孔陶瓷气孔率;空心玻璃微珠的添加可以促进莫来石相的形成,降低烧结温度。在一定温度范围内提高烧结温度可以增大气孔率,但烧结温度超过1350℃后气孔率开始下降。保持Al_(2)O_(3)∶SiO_(2)摩尔比为3∶2,调整空心玻璃微珠添加量至1.68%(质量分数),在1350℃保温2 h烧结条件下可获得气孔率为33.23%、抗弯强度为56.41 MPa的多孔莫来石陶瓷,其耐酸碱腐蚀性能良好。
Porous mullite ceramics were prepared by pressing molding and sintering method,using coal gangue and bauxite as raw materials,hollow glass microspheres as pore-forming agent.The effects of addition amount of hollow glass microspheres and sintering temperature on phase composition,microstructure,flexural resistance and acid and alkali corrosion resistance were studied.The results show that increasing the amount of hollow glass microspheres can increase the porosity of porous ceramics;the addition of hollow glass microspheres can promote the formation of mullite phase and reduce the sintering temperature.In a certain temperature range,increasing the sintering temperature can also increase the porosity,but when the sintering temperature is over 1350℃,the porosity begins to decline.Porous mullite ceramics with porosity of 33.23%and flexural strength of 56.41 MPa can be obtained by keeping the molar ratio of Al_(2)O_(3)∶SiO_(2)=3∶2 and adjusting the addition amount of hollow glass microspheres to 1.68%(mass fraction)and sintering at 1350℃for 2 h,which has good acid and alkali corrosion resistance.
作者
邹欣伟
张风頔
姜凯
郝建英
付勇
ZOU Xinwei;ZHANG Fengdi;JIANG Kai;HAO Jianying;FU Yong(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Zhangjiagang Ruitai Refractory Co.,Ltd.,Zhangjiagang 215628,Jiangsu,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2023年第3期123-130,共8页
Journal of Materials Engineering
基金
国家自然科学基金青年项目(51802212)
山西省重点研发计划项目(201903D121101)
山西省基础研究计划项目(202303021211197)。
关键词
空心玻璃微珠
莫来石
多孔陶瓷
耐腐蚀性
hollow glass microsphere
mullite
porous ceramic
corrosion resistance
