No.1（2006）13.Leadless Low-Melting Glass

Minoru Tanaka, Takao Uwabe, Yoichi Ito, Daisuke Kojima, Junzaburo Ono

Low-melting glass is used as a material for electrical and electronic products. A leadless low-melting glass of borosilicate system (SiO₂, B2O₃, ZnO), that dose not include lead oxide, was produced. Glass was made sintering under about 590℃, without including lead at all. The glass did not crystallize even when it is heat treated by increasing to the range of sintering temperature. The thermal expansion coefficient was about 65-80×10^-7/K, and the low-melting glass on the slide glass was excellent, with no cracks, etc. Also, water resistance, acid resistance, and chemical durability were not remarkably inferior in comparison with lead system glass. The volume resistance constant was 10¹²Ω cm or greater.

Keywords

leadless, low-melting, glass of the borosilicate system

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