还原条件对陶瓷烧成的影响  

Influence of Reducing Conditions on the Sintering of Ceramics

作　　者：张翼[1] 吴建青[1] 曾鑫俊[1] 汪永清[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2004年第3期91-93,共3页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (5 0 0 72 0 0 4 ) ;教育部留学回国人员基金资助项目 (教外司留 [1999]74 7)

摘　　要：利用管式炉定量研究了陶瓷烧成中还原气氛气体含量、还原温度和还原时间三者对日用瓷烧成还原程度的影响 .通过测量样品截面的颜色变化区域来确定还原层的厚度 ,并利用X射线衍射分析仪分析了还原前后陶瓷样品相的变化 .结果表明 ,在 110 0℃含 4 % (质量分数 )一氧化碳气体的还原气氛下 ,厚度为 11.5mm、含 0 .4 7% (质量分数 )Fe2 O3的样品 2min内已还原完全 .The influences of three factors,such as gas contents in reducing atmosphere,reducing temperature and reducing time,on the reducing degree of ware sintering were quantitatively investigated by the tube furnace. The thickness of reducing layer was determined by measuring the color variation region on the ware cross section. XRD was adopted to analyze the ware phase transformation before and after the reducing process. The results indicate that the ceramic with 0.47% (mass fraction) of Fe_2O_3 and 11.5mm of thickness is completely reduced in two minutes under the reducing conditions of 1100℃ and 4% (mass fraction) of CO.

关 键 词：还原气氛 烧成 陶瓷 

分 类 号：TQ174.651[化学工程—陶瓷工业]