| abstract |
(57) [Summary]nThe main crystal is lithium disilicate and α-quarter. Heat of -50 ° C to 70 ° C The expansion coefficient is 90-130 × 10 - 7 / K and crystallization temperature Change in the coefficient of thermal expansion with respect to the You.nThe main crystal phase is α-quartz and lithium alloy. It is an silicate and has a thermal expansion coefficient of -50 to 70 ° C. 90-130 × 10 - 7 / K of crystallized glass And has the following composition (70% by weight ≦ SiO 2 Two ≤ 80% by weight, 5% by weight ≦ Al Two O Three ≦ 9% by weight, 7% by weight % ≦ Li Two O ≦ 10% by weight, 1% by weight ≦ P Two O Five ≤ triple Amount%, K Two O ≦ 3% by weight, CaO ≦ 3% by weight, BaO ≦ 4% by weight, ZnO ≦ 4% by weight, Sb Two O Three ≤ 1 weight %, ZrO Two ≦ 6% by weight, Nb Two O Five ≦ 6% by weight, Sn O Two ≦ 4% by weight, MoO Three ≦ 3% by weight, 0.7% by weight ≦ (Nb Two O Five + SnO Two + MoO Three ) ≦ 6% by weight). |