公开(公告)号：US4710430A

公开(公告)日：1987-12-01

申请号：US729965

申请日：1985-05-03

申请人： Nicholas F. Borrelli ,  George B. Hares ,  Dennis W. Smith ,  Brent M. Wedding

发明人： Nicholas F. Borrelli ,  George B. Hares ,  Dennis W. Smith ,  Brent M. Wedding

IPC分类号： C03C4/06 ,  C03C21/00 ,  C03C23/00

CPC分类号： C03C23/007 ,  C03C21/002 ,  C03C4/06 ,  Y10S430/163

摘要： This invention is directed to a method for modifying the coloration produced in a silver halide-containing photochromic glass when heat treating the glass at a temperature not exceeding 450.degree. C. under reducing conditions. The method comprises subjecting such a glass having a base composition which contains at least 1% by weight Li.sub.2 O, at least 2% by weight Na.sub.2 O, and at least 6% by weight Li.sub.2 O+Na.sub.2 O+K.sub.2 O to an ion exchange reaction, wherein lithium ions, and potassium ions, when the latter are present in the composition, in the glass surface are exchanged with sodium ions from an external source, prior to the reduction heat treatment.

摘要翻译： 本发明涉及一种用于在还原条件下在不超过450℃的温度下热处理玻璃时，改变在含卤化银的光致变色玻璃中产生的着色的方法。 该方法包括将具有至少1重量％Li 2 O，至少2重量％Na 2 O和至少6重量％Li 2 O + Na 2 O + K 2 O的基础组合物的玻璃进行离子交换反应，其中锂离子 ，并且当还原热处理之前，在组合物中存在的钾离子在玻璃表面中与钠离子从外部源交换。