| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transparent glass ceramic having no defect involved in a conventional technique. <P>SOLUTION: The transparent glass ceramic at least having a following composition, 60-76 SiO<SB POS="POST">2</SB>; 18-24 Al<SB POS="POST">2</SB>O<SB POS="POST">3</SB>; 2-5 Li<SB POS="POST">2</SB>O; 0-1.5 MgO; >4-8 ZnO; 1-5 ZrO<SB POS="POST">2</SB>; >0.5-4 SnO<SB POS="POST">2</SB>; 0-1 Na<SB POS="POST">2</SB>O; 0-1 K<SB POS="POST">2</SB>O; 0-4 BaO; 0-0.1 Fe<SB POS="POST">2</SB>O<SB POS="POST">3</SB>; 0-(<0.5) As<SB POS="POST">2</SB>O<SB POS="POST">3</SB>(described in mass% based on oxides) is provided. <P>COPYRIGHT: (C)2012,JPO&INPIT |
