| 摘要 |
PROBLEM TO BE SOLVED: To provide glass ceramics which can be changed in its coefficient of linear thermal expansion within a wide range, is selectively settable in its optical properties, and has further high chemical substance resistance and good workability to extremely different substrate materials. SOLUTION: The apatite glass ceramics has at least one glass phase and at least one apatite phase and at least one of the apatite phase is phosphoric acid-free and fluorine-free siliceous oxyapatite. COPYRIGHT: (C)2005,JPO&NCIPI
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