Nihon Yamamura Glass Co., Ltd.

Kozo Maeda

Yoshitaka Mayumi

Hiroyuki Okada

Naoya Ogura

Disclosed is a sealing glass composition that turns, when fired at a temperature of 900-1150&#xb0; C., into a crystallized glass having a thermal expansion coefficient of 80-110&#xd7;10/&#xb0; C. in the range of 50-850&#xb0; C. The composition is substantially free of both boron oxide and barium oxide, and comprises SiO: 43-53 mol %, CaO: 12-33 mol %, MgO: 12-33 mol %, LaO: 1-7 mol %, and ZnO: 0-4.5 mol %.

Crystallized glass sealing material

Disclosed is a sealing glass composition substantially not containing BOor AlO, which is a high-strength, high-expansive crystallizing glass composition that can be used at high temperatures of not less than 950&#xb0; C. The composition substantially not containing boron oxide, alkali metal oxides or aluminum oxide, but containing, in mol %, SiO: 40-55, BaO: 18-35, TiO+ZrO: 0.1-10, ZnO: 0-15, CaO: 0-20, MgO: 0-9, SrO: 0-5, and LaO: 0-2, wherein the total content of RO (R: Mg, Ca, Sr, Ba and Zn) is at least 44 mol %, and wherein the glass composition, when fired in the form of glass powder at a temperature of 850-1050&#xb0; C, turns into a crystallized glass that exhibits a thermal expansion coefficient of 90-150&#xd7;10/&#xb0; C. in the range of 50-850&#xb0; C.

Glass composition for sealing

Disclosed is a high-strength, high-expansion crystallized glass composition that, by being fired at not less than 850&#xb0; C., can be used at high temperatures at not less than 950&#xb0; C. The composition is a sealing glass composition substantially free of boron oxide and comprising the following components, in mol %, SiO: 40-50%, ZnO: 16-30%, BaO: 5-25%, CaO: 0-25%, AlO: 0-5%, and RO: not less than 44% (wherein R denotes one or more species of Mg, Ca, Sr, Ba, and Zn).

Sealing glass composition

An insulating layer forming material and an insulating layer forming paste capable of forming an insulating layer on a metallic substrate without the filler and glass reacting or warpage occurring even when repeatedly fired at 850&#xb0; C. or higher are provided. The insulating layer forming material containing a lead-free glass composition and an &#x3b1;-quartz filler contains 17.0-40.0 wt. % of the &#x3b1;-quartz filler and 60.0-83.0 wt. % of the lead-free glass composition. The &#x3b1;-quartz filler has an average particle diameter (D) of 1.0-3.5 &#x3bc;m and a specific surface area of 2.5-6.5 m/g. The lead-free glass composition includes no BOand comprises a composition, in mol %, of 40.0-60.0% SiO, 0.5-10.0% AlO, 20.0-45.0% MgO+CaO+SrO+BaO, 5.0-23.0% ZnO, and 0-10.0% LiO+NaO+KO.

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Hyogo, Japan

Kozo Maeda