2K02 ガラスを用いたアルミナセラミックスとサファイア単結晶との接合

概要

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The joining of sapphire single crystal plate to alumina ceramic tube is fabricated successfully using 34CaO-30Al_2O_3-36SiO_2 glass as an interlayer. This glass showed fine adhesion performance to alumina ceramics and sapphire single crystal and rapid penetration through the grain boundaries of the alumina ceramics. The joint with no crack was obtained by heating at 1550℃ for 10 min and slow cooling from 1200℃ to room temperature. From the thermal shock test, the half of the specimens showed the cracks after quenching from 225℃ to 0℃, but all specimens showed no crack after quenching from 200℃ to 0℃. The specimen composed of alumina tube-sapphire plate-alumina tube showed the compatible bending strength to the specimen composed of alumina tube-alumina tube.
2002-09-22