H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/81
H01J 61/44 (2006.01) C09K 11/77 (2006.01)
Patent
CA 1112285
PHN. 8794. ABSTRACT: A low-pressure mercury vapour discharge lamp provided with a luminescent Eu-activated rare earth oxide, a luminescent aluminate with hexagonal crystal structure activated by Ce or by Ce and Tb, or a luminescent aluminate with hexagonal crystal structure activated by Eu or by Eu and MN. Not more than 5% by weight of the luminescent material has a grain size smaller than 1 µm and the maxi- mum of the grain size distribution curve is located in the range from 2 to 8 µm.
302095
Peters Robert C.
Tak Marinus G.a.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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