Anisotropic grain growth in seeded and B2O3-doped diphasic mullite gels
Anisotropic grain growth in seeded and B2O3-doped diphasic mullite gels
复制标题
DOI：
10.1016/0955-2219(95)00144-1
复制
发表时间：
1996
影响因子：
5.7
通讯作者：
Seong‐Hyeon Hong;W. Cermignani;G. Messing
中科院分区：
文献类型：
--
作者：
Seong‐Hyeon Hong;W. Cermignani;G. Messing
研究了B2O3掺杂的两相凝胶中莫来石颗粒和晶须的各向异性生长。在所有系统中观察到各向异性晶粒生长。最大的各向异性晶粒，获得与2wt%的莫来石晶须和掺杂2wt%B2O3的系统接种。莫来石晶须作为多个成核的网站，并随后作为模板莫来石过度生长。氧化硼使莫来石形成温度降低了150 °C，并且显著增强了与晶种颗粒的存在无关的各向异性晶粒生长。这种增强归因于氧化铝的溶解增加。
Anisotropic grain growth in mullite was investigated in B2O3-doped diphasic gels seeded with either mullite particles or whiskers. Anisotropic grain growth was observed in all systems. The largest anisotropic grains were obtained with a system seeded with 2 wt% mullite whiskers and doped with 2 wt% B2O3. The mullite whiskers act as sites for multiple nucleation and subsequently as templates for mullite overgrowth. Boria lowered the mullite formation temperature by 150 °C and it significantly enhanced anisotropic grain growth independent of the presence of seed particles. This enhancement was attributed to increased dissolution of alumina.