铁对R2O-CaO-MgO-Al2O3-SiO2系玻璃微晶化的影响

就石材锯切粉在微晶玻璃中应用的主要问题-铁对析晶的影响展开研究。结果表明，少量铁（〈2mol％）的引入，可能引起析晶参数的升高，但外加铁含量超过2mol％时均可降低析晶参数，并使起始析晶至析晶峰的温度区间（Tp-Tg）变窄；外加铁量〈2mol％时，不同含铁量配方的（Tp—Tg）区间重叠显著，可以采用同一温度晶化处理；配方含铁与否对主晶相没有明显影响，但影响玻璃的析晶能力，铁含量〈2mol％时，使玻璃体析晶能力增加，接近或大于3mol％时，玻璃析晶能力降低；微粉制备微晶玻璃可以大幅度缩短晶化时间。

THE EFFECTS OF Fe2O3 ON THE CRYSTALLIZATION OF R2O-CaO-MgO-Al2O3-SiO2 GLASS-CERAMICS

In this paper,a main application of stone-powder in glass-ceramics was investigated.The results showed:When less than 2mol% Fe_2O_3 was introduced into glass,the crystallization parameter of glass-ceramics was possibly increased,and almost all the samples' temperature range from Tp to Tg overlapped partly,that means glass samples can be crystallized at the same temperature.When more than 2mo1% Fe_2O_3 was introduced into glass,the crystallization parameter was decreased,and the temperature range from Tp to Tg was narrowed,that indicated the crystallization capability of glass was increased.In addition,added Fe_2O_3 content has not distinct impact on the main crystalline phases of glass-ceramics,and crystallization time can be greatly decreased by using micro-powder to prepare glass-ceramics.The above results were quite useful for the further application of stone-power.