C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
313/160, 49/92.5
C03C 27/00 (2006.01) C04B 35/50 (2006.01) C04B 37/02 (2006.01) H01J 61/36 (2006.01)
Patent
CA 1184037
PHN 9968 17 28.8.1981 ABSTRACT: Composite body. Composite body, a gas discharge lamp having a sodium pressure from 300-600 torr in particular, having an envelope of densely sintered aluminium oxide or of other sodium vapour-resistant materials and a feed-through member of tantalum, niobium or other metals equivalent thereto, the bonding material consisting of a finely dis- persed polycrystalline product having a composition in mole % between the following limits: Al2O3 5-70 at least one oxide chosen from Sc2O3 and Ti2Ox, wherein 2 < x < 4 2-70 and at least one oxide chosen from: Y2O3 Gd2O3, Tb2O3, DY2O3, Ho2O3, Er2O3, Eu2O3, Pr2O3 Ce2O3, Sm2O3, Tm2O3, Yb2O3, Lu2O3, La2O3 and Nd2O3 7-80.
397633
Driessen Antonius J.g.c.
Geertsema Eise B.
Oomen Joris J.c.
Rouwendal Jan W.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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