摘要
以石英为骨料，钾长石为高温粘结剂，木炭为造孔剂制备无机盐／石英基复合相变储能材料用的微米孔石英多孔陶瓷基体，采用正交实验法系统研究了骨料颗粒粒度、造孔剂粒度、造孔剂含量、高温粘结剂含量及烧成温度对石英多孔陶瓷的显气孔率和抗折强度的影响。研究结果表明，影响石英多孔陶瓷抗折强度的最主要因素是长石含量，其次是骨料粒度和造孔剂粒度；影响石英多孔陶瓷显气孔率的主要因素是造孔剂含量。制备微米孔石英多孔陶瓷的优化配方和工艺是：石英、木炭和长石均过325目筛，三者质量比为7：2：1，烧成温度为1270℃，保温时间为1h。该陶瓷具有以下优良的性能：显气孔率为55．12％，体积密度为1．14g/cm^3，抗折强度为3．14MPa，抗压强度为7．12MPa，平均孔径为13．87μm且孔径分布范围较窄，96％的气孔孔径在9～21μm之间。
Using quartz as aggregates, potassium feldspar as high temperature binder and charcoal as pore-forming agent, quartz micro-porous ceramic matrix for inorganic salt/SiO2 composite phase change energy storage materials were prepared by adding pore-forming agent. The effects of aggregate particles＇ size, the particles＇ size and content of pore-forming agent, the content of high temperature binder and firing temperature on quartz porous ceramics＇ apparent porosity and bending strength were investigated in a systematic way by orthogonat experiment. The research results show that the content of feldspar is the most important factor of quartz porous ceramics＇ bending strength, the particles＇ size of aggregates and pore-forming agent are the next. The key factor of quartz porous ceramics＇ apparent porosity is the content of pore-forming agent. The optimized formula and process are as follows ： the mass ratio of quartz, charcoal and feldspar is 7 ： 2 ： 1, and they are all screened through mesh size of 325, the firing temperature is 1270 ℃ with holding time of 1 h. Under these conditions, the quartz micro-porous ceramics have good performance as follows： the apparent porosity is 55.12% , the bulk density is 1.14 g/cm^3, the bending strength is 3.14 MPa, the compressive strength is 7.12 MPa, the average pore size is 13.87 μm, the pore size distribution is narrow, which of 96% pores are 9-21 μm.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第12期2476-2480,2489,共6页
Bulletin of the Chinese Ceramic Society
基金
江西省"赣鄱英才555工程"领军人才计划项目
关键词
多孔陶瓷
石英
因素
微米孔
porous ceramics
quartz
factor
micro-porou
