Gas-tight sintered translucent aluminium oxide

Details Gas-tight sintered translucent aluminium oxide Gas-tight sintered translucent aluminium oxide

C - Chemistry, Metallurgy

04

B

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C04B 35/10 (2006.01) C04B 35/111 (2006.01) C04B 35/115 (2006.01) H01J 61/30 (2006.01)

Patent

CA 1256128

ABSTRACT: "Gastight sintered translucent aluminium oxide" The invention relates to gas-tight sintered translucent aluminium oxide having a density of at least 99.5 %, which contains at most 1000 ppm by weight of MgO. According to the invention, the aluminium oxide also has a content of Er2O3 lying between 20 ppm by weight and 200 ppm by weight. The material thus obtained has a great mechanical strength, a high resistance to especially attack by sodium and a satisfactory translucence. Thus, the material is very suitable for use as wall material for the discharge vessels of high-pressure discharge lamps.

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