节点文献

Al2O3-ZrO2-SiO2系相图结构特征的研究

STUDY ON STRUCTURAL FEATURE OF PHASE DIAGRAM FOR Al2O3-ZrO2-SiO2 SYSTEM

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 赵海雷沈继耀陆文汉

【Author】 Zhao Hailei Shen Jiyao Lu Wenhan (Department of Materials Science and Engineering,Tianjin University)

【机构】 天津大学材料科学与工程系天津大学材料科学与工程系天津大学材料科学与工程系 北京科技大学攻读博士学位

【摘要】 按照Al2O3/SiO2比值,在Cevales给出的Al2O3-ZrO2-3Al2O3·2SiO2系的无变量点附近选择了6个组成,对其进行了熔体自然冷却、缓冷和淬冷析晶试验,并对析晶后的试样进行了XRD、SEM和EDAX分析,结果表明:(1)相平衡关系与Cevales给出的Al2O3-ZrO2-3Al2O3·2SiO2系相图的结构特征吻合得很好,其无变量点为低共熔点;(2)莫来石晶相的Al2O3/SiO2比值波动于A3S2-A?-7S之间,与Aramaki和Roy测定的Al2O3-SiO2系莫来石稳态固溶体的Al2O3上限含量为74.3%是一致的;(3)析晶的单一莫来石晶相的EDAX能谱中不存在Zr谱线,ZrO2在莫来石中的固溶问题,应进一步研究。

【Abstract】 According to the difference of Al2O3/SiO2 ratios, around invariant point of Cevales’ Al2O3-ZrO2-3Al2O3·2SiO2 system, six different compositions Were selected and put into experiments involving crystallization of melts in natural and slowly-controlled cooling and quenching conditions respectively. The phase components and compositions of the crystallized specimens were studied by use of XRD, SEM and EDAX. The results indicate that(1) the equilibrium phase relationship is in good agreement with the structure feature of phase diagram of Al2O3-ZrO2-3Al2O3·2SiO2 system established by Cevales,and the ternary invariant point is eutectic point; (2)the stable solid solution range of mullite is from A-3S2 to A-(1.7)S, which coincided with the Al2O3 upper limit of 74.3% givin by Aramaki and Roy for the stable mullite solid solution in Al2O3-SiO2 system;(3)the EDAX spectra obtained show no Zr specific line for the single-phase mnllite crystallized from the melts. So problem of the solid solution of ZrO2 in mullite would require further investigations.

【关键词】 氧化铝氧化锆氧化硅相图固溶无变点共熔点
【Key words】 aluminazirconiasilicasolid solutioninvariant pointeutectic point
  • 【文献出处】 硅酸盐学报 ,Journal of The Chinese Ceramic Society , 编辑部邮箱 ,1991年03期
  • 【被引频次】6
  • 【下载频次】409
节点文献中: 

本文链接的文献网络图示:

本文的引文网络