发明授权
- 专利标题: Transparent glass-ceramics based on alpha- and beta-willemite
- 专利标题(中): 透明玻璃陶瓷基于α-和β-硅青粉
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申请号: US09686419申请日: 2000-10-11
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公开(公告)号: US06303527B1公开(公告)日: 2001-10-16
- 发明人: Linda R. Pinckney
- 申请人: Linda R. Pinckney
- 主分类号: C03C1004
- IPC分类号: C03C1004
摘要:
A glass-ceramic which is substantially and desirably totally transparent, and which contains a willemite predominant crystal phase within the ternary Mg2SiO4—Zn2SiO4—Li4SiO4 system. The glass-ceramic is formed from precursor glasses having the following compositions, in weight percent on an oxide basis, of 25-60 SiO2, 4-20 Al2O3, 20-55 ZnO, 0-12 MgO, 0-18 K2O, 0-12 Na2O, 0-30 GeO2, with the condition that &Sgr;K2O+Na2O≧5. The glass-ceramic may be doped with up to 1 wt. % Cr2O3 to impart optical activity thereto.
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