Effect of VB and VIB oxides on nucleation parameters in lithium disilicate glass
Effect of VB and VIB oxides on nucleation parameters in lithium disilicate glass
复制标题
VB和VIB氧化物对二硅酸锂玻璃成核参数的影响
DOI：
10.1016/0022-3093(89)90294-9
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发表时间：
1989
影响因子：
3.5
通讯作者：
D. Lynch
中科院分区：
文献类型：
--
作者：
M. Schlesinger;D. Lynch
有人提出，一些氧化物作为晶核剂在玻璃陶瓷中，通过降低亚临界晶核和玻璃基质之间的界面张力。存在将VB族和VIB族氧化物分类为这种类型的证据，这将支持它们作为均质成核剂的行为。然而，MoO 3，Nb 2 O 5，Ta 2 O 5，和WO 3的取代二硅酸锂玻璃中的二氧化硅被证明会导致在733 K下的稳态成核速率降低和诱导期增加，而V2 O 5的取代导致无关紧要的变化。通过玻璃横截面上的晶体密度热处理后的差异冷却速率的效果是最明显的，在那些玻璃中含有的氧化物，最延迟成核作为一个整体。这些影响和取代的氧化物对玻璃的物理性质的影响之间的可能的关系进行了分析;假设粘度和成核参数之间的特别重要的联系。
It has been proposed that some oxides act as nucleation agents in glass ceramics by reducing the interfacial tension between subcritical nuclei and the glass matrix. Evidence exists for classifying the Groups VB and VIB oxides in this type, which would support their behavior as homogeneous nucleation agents. However, substitution of MoO3, Nb2O5, Ta2O5, and WO3for silica in lithium disilicate glass was shown to cause decreased steady-state nucleation rates and increased induction periods at 733 K, while substitution of V2O5resulted in inconsequential changes. The effect of differential cooling rates through the glass cross section on crystal density following heat treatment was most apparent in those glasses containing the oxides that most retarded nucleation as a whole. The possible relationships between these effects and the effects of the substituted oxides on the physical properties of the glasses are analyzed; an especially significant link between viscosity and nucleation parameters is postulated.