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    • 33. 发明公开
    • BISMUTH-CONTAINING GLASS COMPOSITION
    • WISMUTHALTIGE GLASZUSAMMENSETZUNG
    • EP2746234A1
    • 2014-06-25
    • EP12840246.8
    • 2012-09-14
    • CENTRAL GLASS COMPANY, LIMITED
    • TOMINAGA, Kouji
    • C03C8/04C03C3/068C03C8/14
    • C03C8/20C03C3/066C03C3/145C03C8/04C03C8/14C03C8/24
    • A bismuth-based glass composition according to the present invention contains Bi 2 O 3 , B 2 O 3 and ZnO, wherein the bismuth-based glass composition has a Bi 2 O 3 content of 55 to 80 mass% and further contains 0.1 to 5 mass% of at least one of SrO and BaO as an RO component. Preferably, the bismuth-based glass composition according to the present invention has a linear expansion coefficient of (65 to 95)×10 -7 /°C at 30 to 300°C and a softening point of 450 to 530°C. There is a problem that bismuth-based glasses are often structurally unstable, are crystalized during firing and lose their flowability due to such crystallization so that it is difficult for the bismuth-based glasses to secure good adhesion strength and airtightness. By contrast, the bismuth-based glass composition according to the present invention is transparent and is less likely to be crystallized during firing.
    • 根据本发明的铋基玻璃组合物含有Bi 2 O 3,B 2 O 3和ZnO,其中铋系玻璃组合物的Bi 2 O 3含量为55〜80质量%,进一步含有0.1〜5 作为RO成分的SrO和BaO中的至少一种的质量%。 优选本发明的铋系玻璃组合物在30〜300℃的线膨胀系数为(65〜95)×10 -7 /℃,软化点为450〜530℃。 存在铋基玻璃通常在结构上不稳定,在烧制期间结晶化并由于这种结晶而失去其流动性的问题,使得铋基玻璃难以确保良好的粘合强度和气密性。 相反,根据本发明的铋基玻璃组合物是透明的,并且在焙烧期间不太可能结晶。