堇青石多孔陶瓷的制备与性能表征_英文_.pdf.pdf

第 34卷第 2期硅酸盐学报 , 2006年 2月 JOURNALOFTHECHINESECERAMICSOCIETY February,2006 堇青石多孔陶瓷的制备与性能表征张学斌 1,任祥军 2,王松林 1,刘杏芹 2,孟广耀 2 (,合肥 230009;,合肥 230026 ) 摘要:以粉煤灰和碱式碳酸镁为主要原料制得了堇青石多孔陶瓷材料。烧结温度在 1100~ 1350℃时,样品的弯曲强度由 50MPa增加至 65MPa,热膨胀系数由 × 10 -6℃-1下降至 × 10 -6℃-1。优化的烧结工艺为 1300℃保温 4h。样品的孔隙率和孔径随原料中淀粉含量的增加而增加。在原料中添加 40% (质量分数)的造孔剂(淀粉)可使样品的孔隙率、平均孔径为和氮气通量分别达到 %, 21 35 μm和 · h -1Pa -1。关键词:堇青石;多孔陶瓷;粉煤灰;热膨胀系数;氮气通量中图分类号:TQ174 文献标识码:A 文章编号:0454 5648 (2006 )02 247 04 PREPARATIONANDCHARACTERIZATIONOFPOROUSCORDIERITECERAMICSFROMFLYAsh ZHANGXuebin 1,RENXiangjun 2,WANGSonglin 1,LIUXingqin 2,MENGGuangyao 2 (11 SchoolofMaterialsScience&Engineering,HefeiUniversityofTechnology,Hefei 230009;21 DepartmentofMaterials ScienceandEngineering,UniversityofScience&TechnologyofChina,Hefei 230026,China ) Abstract: eshighfrom1100to1300℃,theporositydecreasesfrom34%to26%,theflexuralstrengthincreasesfrom50 MPato65MPA,× 10 -6℃-× 10 -6℃- processisoptimizedatabout1300℃ porosity,%, · h -1Pa -1,respectively,ifstarch (40%in mass )wasaddedasaporeformingagent. Keywords:cordier