磁存储器之纳米相微晶玻璃基片研究

Study of transparent nano-crystalline glass-ceramics substrates as maganetic storage devices

利用差热分析(DTA)探讨了不同成核剂含量(ZrO2+P2O5)对β 石英相纳米微晶玻璃制备的影响,采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)等分析了热处理制度控制对获得纳米相微晶玻璃的影响。结果表明:4%(质量分数)ZrO2+2%(质量分数)P2O5的复合成核剂含量能促进β 石英相和二硅酸锂的形成,阻止了向β 锂霞石的转变,在一定工艺条件下核化、晶化,可制备出粒径约为35nm、均匀分布的纳米相微晶玻璃,其抗弯强度达247MPa,抗压强度达414MPa,维氏硬度达659MPa,可用作高性能磁存储器基片。

The effect of different amount of nucleating agent on the fabrication of β-quartz nanocrystalline glass-ceramics was reported by DTA techniques.And the control of heat-treatment process was also investigated to obtain nanocrystalline glass-ceramics and characterized by XRD, SEM and TEM techniques,It was found that appropriate amount(4wt% ZrO_2+2wt% P_2O_5) of nucleating agent promoted the form of β-quartz、lithium disilicate and prevented theβ-eucryptite. After nucleation and crystallization, We developed uniformly dispersed β-quartz glass-ceramics with the size about 35nm. Its optimum properities were as follows: bending srength of 247MPa,vikers hardness of 659MPa,compressive strength of 414MPa.The glass-ceramics with nanometer phase was proved to be excellent material used as magnetic storage devices substrates.