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纯氧化铝瓷与高氧化铝瓷之间,纯氧化铝瓷、高氧化铝瓷与金属之间封接的一种新工艺巳出现。此法使用由几种氧化物的混合物组成的陶瓷玻璃焊料对氧化铝瓷件或氧化铝与金属直接进行封接。采用Al_2O_3-MnO-SiO_2系的混合物,封接温度是1140℃或更高些。采用Al_2O_3-CaO-MgO-SiO_2系的混合物来封接,封接件必须承受1300℃或更高温度。这些陶瓷玻璃焊料能用来封接纯氧化铝瓷与高氧化铝瓷或纯氧化铝瓷,高氧化铝瓷与金属。Al_2O_3-MgO-SiO_2系的配方可用于陶瓷与铁基合金封接,亦可用于陶瓷与难熔金属封接,而Al_2O_3-CaO-MgO-SiO_2系的配方可用来封接氧化铝瓷与难熔金属,以供极高温方面的应用。用此法进行的封接在热特性和热力学特性上完全不同于玻璃封接。本文讲述了封接强度的测量结果和封接形成机理的研究。
A new process of sealing between pure alumina ceramic and high alumina ceramic, pure alumina ceramic, high alumina ceramic and metal has emerged. This method uses a ceramic glass solder consisting of a mixture of several oxides to directly seal alumina ceramic pieces or alumina and metal. With a mixture of Al 2 O 3 -MnO-SiO 2, the sealing temperature is 1140 ° C or higher. Sealing with a mixture of Al 2 O 3 -CaO-MgO-SiO 2 series must withstand temperatures of 1300 ° C or higher. These ceramic glass solder can be used to seal pure alumina porcelain and high alumina porcelain or pure alumina porcelain, high alumina porcelain and metal. The formula of Al_2O_3-MgO-SiO_2 system can be used to seal ceramics and iron-based alloys, and can also be used for sealing ceramics and refractory metals. The formula of Al_2O_3-CaO-MgO-SiO_2 system can be used to seal alumina ceramics and refractory Metal, for extremely high temperature applications. Sealing by this method is completely different in thermal and thermodynamic characteristics from glass sealing. This article describes the measurement of seal strength and seal formation mechanism.