Luminescent screen

Details Luminescent screen Luminescent screen

C - Chemistry, Metallurgy

09

K

117/22

C09K 11/55 (2006.01) C09K 11/67 (2006.01) C09K 11/77 (2006.01) H01J 61/42 (2006.01) H01J 61/44 (2006.01)

Patent

CA 1220989

16 ABSTRACT: A luminescent screen provided with a luminescent layer (4) formed on a carrier (1), which layer comprises an aluminate and/or a gallate of strontium and/or barium activated by bivalent europium or by trivalent chromium. The aluminate and/or gallate has an orthorhombic crystal structure with a space group Pnnm and has a composition defined by the formula Me2-xEuxA6-yCryO11 (Me = Sr, Ba and A = Al, Ga). An advantageous application of such a luminescent screen is found in low-pressure mercury vapour discharge lamps.

454065

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