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公开(公告)号：EP0080344A1
公开(公告)日：1983-06-01
申请号：EP82306176.7
申请日：1982-11-19
申请人： Corning Glass Works
摘要： A glass ceramic characterised in that it is capable of being fired repeatedly to temperatures of greater than 950°C without undergoing thermal deformation, it exhibits a coefficient of thermal expansion (25-600°C) of from 80 to 125 x 10 -7 /C°, it is substantially free from alkali metal oxides and it comprises, expressed in terms of weight percent on the oxide basis: from 5 to 35% MgO, from 0 to 35% CaO, from 0 to 25% ZnO, from 10 to 35% CaO + ZnO, from 0 to 10% Al 2 O 3 , from 0 to 25% B 2 O 3 , from 0 to 10% P 2 O 5 , from 4 to 25% B 2 0 3 + P 2 0 5 and from 25 to 50% Si0 2 is disclosed.
More particularly, the present invention relates to such a glass-ceramic in the form of a coating on a substrate, for example a titanium-stabilized stainless steel.
In the case of the glass-ceramic in the form of a coating, a process for the production thereof characterised in that it comprises:
(a) melting an appropriate batch;
(b) cooling the melt to a glass and comminuting the glass to fine particles passing a No. 325 United States Standard Sieve (44 x 10- 6 m );
(c) preparing a liquid slurry of the glass particles;
(d) applying the slurry as a coating onto a desired substrate; and
(e) firing the coating to a temperature of at least 850°C substantially simultaneously to fuse the glass particles together into an integral, essentially non-porous coating and to cause extensive crystallization in situ to take place therein is also disclosed.
Inter alia, the present materials have improved properties as regards the use thereof in the construction of circuit boards.摘要翻译： 一种玻璃陶瓷，其特征在于它能够在不经历热变形的情况下重复地煅烧至大于950℃的温度，其具有80至125×10 -7 /℃的热膨胀系数（25-600℃） C°时，它基本上不含碱金属氧化物，并且其包含以氧化物为基准的重量百分数：5-35％的MgO，0-35％的CaO，0-25％的ZnO，10-10％ 35％CaO + ZnO，0至10％Al 2 O 3，0至25％B 2 O 3，0至10％P 2 O 5，4至25％B 2 O 3 + P 2 O 5和25至50％SiO 2。 更具体地说，本发明涉及这种在基底上形成涂层的玻璃陶瓷，例如钛稳定化的不锈钢。 在涂层形式的玻璃陶瓷的情况下，其生产方法的特征在于它包括：（a）熔化适当的批次; （b）将熔融物冷却成玻璃，并通过325号美国标准筛（44×10 -6 m）将玻璃粉碎成细颗粒; （c）制备玻璃颗粒的液体浆料; （d）将所述浆料作为涂层施加到期望的基底上; 和（e）基本上同时将涂层烧制至至少850℃的温度以将玻璃颗粒熔合在一起形成整体的，基本上无孔的涂层并且在其中发生原位发生大量结晶。 尤其是，本发明材料在电路板结构中的使用方面具有改进的性能。
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