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By means of ion exchange in k - medium below 10 high 14,5 poise chemically to strengthening, photo leading spectacle lens with improved phototropic properties
By means of ion exchange in k - medium below 10 high 14,5 poise chemically to strengthening, photo leading spectacle lens with improved phototropic properties
1428880 Phototropic glass CARL-ZEISSSTIFTUNG [trading as JENAER GLASWERK SCHOTT & GEN] 2 Sept 1974 [1 Feb 1974] 38313/74 Heading C1M [Also in Division C4] A phototropic glass which is free from fluorine and boric oxide and comprises, in per cent by weight: SiO 2 12À1 -13À9 P 2 O 5 30À4 -33À9 Al 2 O 3 22À5 -25À7 ZrO 2 1 - 2À6 Na 2 O 3 - 7À5 K 2 O 5À3 -10À5 CaO 3À1 - 5 BaO 3À1 - 7 SrO 0 - 0À5 PbO 0À4 - 2À5 TiO 2 0À1 - 0À6 La 2 O 3 0À05- 2 Ag 2 O 0À05- 1 CuO 0 - 0À1 Cl and/or Br 0À2 -10; the balance, if any, being one or more compatible constituents. The glass is preferably free of MgO, and preferably exhibits non- crystalline phase separations containing silver and halogen. Preferably the molten glass is cast, cooled to solidify it, and re-heated to 560-640‹ C. for 1-3 hours to develop phototropicity. The glass may be ion-exchange strengthened (e.g. using a molten KNO 3 bath) at a temperature below that at which the viscosity is 10SP14À5/SP poises, to give a stress-layer up to, e.g. 87Á, in thickness.
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机译：1428880光致玻璃CARL-ZEISSSTIFTUNG [以JENAER GLASWERK SCHOTT＆GEN的名称交易] 1974年9月2日[1974年2月1日] 38313/74标题C1M [也在C4分部中]一种无光玻璃，不含氟和氧化硼，其组成如下：重量百分比：SiO 2 12‑1 -13‑9 P 2 O 5 30‑4 -33‑9 Al 2 O 3 22‑5 -25‑7 ZrO 2 1-2‑6 Na 2 O 3-7‑5 K 2 O 5‑3 -10‑5 CaO 3‑1-5 BaO 3‑1-7 SrO 0 -0‑5 PbO 0‑4-2‑5 TiO 2 0‑1-0‑6 La 2 O 3 0‑05- 2 Ag 2 O 0‑05- 1 CuO 0 -0‑1 Cl和/或Br 0‑2 -10;余额（如果有）是一个或多个兼容的组成部分。玻璃优选不含MgO，并且优选表现出包含银和卤素的非晶相分离。优选地，将熔融玻璃浇铸，冷却以使其固化，然后再加热至560-640℃达1-3小时以发展光致性。可以在低于粘度为10 14-5 泊的温度下对玻璃进行离子交换强化（例如，使用熔融的KNO 3浴），以产生高达例如10μm的应力层。厚度为87Á。
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