新型硬盘基板微晶玻璃的晶核剂研究

采用差热分析(DTA)、X-射线衍射分析(XRD)和扫描电镜(SEM)等分析手段研究了P2O5、TiO2、ZnF2作为晶核剂对Li2O-Al2O3-SiO2(LAS)系统微晶玻璃形核和晶化的影响。结果表明:P2O5晶核剂能获得小尺寸的晶粒,晶型为球形或多面体形,析晶的可控制性良好;TiO2晶核剂析晶温度较高,析晶强烈,形成条状细晶;ZnF2晶核剂能获得小尺寸球状晶粒,析晶温度较低,但对温度过于敏感。P2O5作为晶核剂可以获得理想小晶粒的透明微晶玻璃,从而适合于用作新型硬盘基板。

Research on nucleation agents of new style hard disk

The nucleation and crystallization of Li2O-Al2O3-SiO2 glasses which has P2O5 、TiO2 、ZnF2 as nuclear doses independently are investigated by the differential thermal analysis(DTA),X-ray diffraction (XRD) and the scanning electron microscopy(SEM). The results shows that P2O5 nuclear dose can obtain spherical or polyhedral minor size crystal grains and has better controllability;TiO2 nuclear dose has higher crystallization temperature ,intensive crystallization and formatting banding close grains;ZnF2 nuclear dose can obtain minor size crystal grains and lower crystallization temperature,but it is sensitive to temperature. The transparent glass-ceramics considered having the ideal and minor size crystal grains can be obtained and can be fitted for new substrate of hard disk.