C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/113, 117/22
C09K 11/80 (2006.01) C09K 11/66 (2006.01) C09K 11/77 (2006.01) H01J 61/44 (2006.01)
Patent
CA 1201580
ABSTRACT: Luminescent screen provided with a luminescent layer (4) which is disposed on a support (1) and comprises an alkaline earth metal aluminate activated with bivalent europium or with bivalent lead. The alkaline earth metal is strontium of which up to 25 mol.% may be replaced by calcium. The aluminate has a crystal structure the X-ray powder diagram of which corresponds to the diagram of Table I given in the description, whilst the molar ratio of total bivalent metal to aluminium in the aluminate has a value of 1 : 2 to 1 : 5. An advantageous application of such a luminescent screen is found in low-pressure mercury vapour discharge lamps.
427540
Hoeks Gerardus P.f.
Van de Velde Albert P.h.
Van Kemenade Johannes T.c,
Koninklijke Philips Electronics N.v.
Van Steinburg C.e.
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