红柱石制备莫来石泡沫陶瓷.pdf

第21卷第5期
材料科学与工艺
Vol 21 No, 5
2013年10月
MATERALS SCIENCE TECHINOLOGY
红柱石制备莫来石泡沫陶瓷
狄正贤,阎峰云2,耿海涛,李静娟
(1.兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050;2.兰州理工人学
甘肃省有色金属新材料省部共建国家重点实验室,兰州730050;3.由银市工业学校,甘肃白银730900
摘要:以红柱石和氧化铝为主要原料、聚苯乙烯粒子为造孔剂,通烧结法制备莫来石泡沫陶瓷,借助
XRD和SEM分祈了烧成温度和骨料配比对获得莫来石相组成和结构的影规偉,并通过正交试验,探讨烧
结温度、造孔剂加入量和骨料配比等工艺参数对制备莫来石泡沫陶瓷性能的影响.结果表明:造孔剂加入量
对密度和强度的影响较大,烧结温度次之,骨料配比最小;最佳的因素水平为烧结温度1450℃,EPS质量分
数5%,骨料质量比m(红柱石):m(氧化铝)=80:20,此时表观密度为0,52g/em3,抗折强度0.36MPa
关词:泡阐瓷;莫来石;红柱石;造孔剂;表观密度;抗折强度
中图分类号:TQ175
文献标志码:A文章编号:1005-0299(2013)05-0015-05
Mullite porous ceramic prepared by andalusite
DI Zheng-xian ", YAN Feng-yun", GENG Hai-lao', LI Jing-juan'
(1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Ianzhou [niversity of Technology
Lanzhou 730050, China 2. Key Laboratory ofnon-ferous Metal Alloys and Processing of Mini try of Education
Lanzhou University of echnol gy, Lan ou 730050, China 3. Baiyin School of Industry, Bai in 730900, China)
Abstract ith andalusite and alumina as the main material, E.PS as pore-forming aent, mullite porous
ceramic was prepared by Sintering Process. The phase and microstructure of the mullite prepared at different
sintering temperature and mixture ratio of gain were analyzed by RD and SEM methods. The effect
sintering lemperature, adding amount of EPS and the mixtures of andalusite and alumina mixture ratio on
properties of mulite were investigated by means of orthogonal experiment. It showed that the effect of EPS on
bulk density and bending strength of mullite was the most, that of the sintering temperature was the second and
the mixture ratio was the least. When the sintering temperature is at I 450C, the pore-forming agent is 5wt%
and the mixture mass ratio of raw material is 80: 20, the bulk density is 0.52 g/cm, and the bendin
strength is 0.36 Mpa
Key words: porous ceramic mullite; andalusite; pore-formning agent; bulk density; bending strength
泡沫陶瓷材料是在材料成形与烧结过程中控耐火材料相比质量减轻1/5至1/8;2)由于导热
制孔径大小和分布而形成的一类多孔隙陶瓷产系数很低的气体存在于固相内的气孔中,降低工
品可.莫来石(3Al,O,·2SiO2)泡沫陶瓷材料具有业窑炉砖砌体的热损耗,节省燃料消耗,提高生产
较好的高温力学性能和良好的体积稳定性,广泛效率2-°
应用于热风炉、金属熔炉、陶瓷隧道窑、电瓷梭式
自然界中很少有天然莫来石存在,大都采用
窑等高温热工设备的隔热层、内衬和保温层等部人工合成法得到莫来石产品合成莫来石的方法
位.它有以下优点:1)减轻自重降低成本,与致密有多种,如:向粘土中加入金属铝粉,通过在氧化
气氛中热压得到?;用天然铝矾土加粉煤灰,经
收稿日期:2012-03-29
烧结而得到;以天然硅石和工业氧化铝为原料
作者简介:秋正贤(1982-),女,硕土研究生,讲师
峰云(192-),男,教授,博十生导师
高温煅烧而得到.制备多孔材料的方法也有多
通信作者;阍峰云,E-mgib;vanty_2005139.com.
种,可通过发泡法或分解法产生多孔结构,也可向
万方数据