Luminescent meta-borate substances

Details Luminescent meta-borate substances Luminescent meta-borate substances

1999-09-09

2000-07-11

Koslow, C. Melissa

Deposit and collection receptacles

Fare boxes

Multiple coin slot and runway

2523016R, 2523016F, 2523014R, 2523015, 2523016P, 2523014P, C09K 1163, C09K 1186, C09K 1179, C09K 1157, C09K 1177

Patent

active

060859717

ABSTRACT:
The present invention relates to variously activated luminescent metaborates having luminescence properties improved in comparison with conventional luminescent substances. Moreover, the activated luminescent metaborates have outstanding stability under the influence of short-wave UV radiation so that they are preferably suitable for use in luminescent screens, in particular, low-pressure mercury vapor discharge lamps of all types and designs. The luminescent substances of the present invention are based on rare earth metal borates of the formula:

REFERENCES:
patent: 4319161 (1982-03-01), Looye et al.
patent: 4602188 (1986-07-01), de Hair et al.
patent: 4629582 (1986-12-01), Terashima et al.
patent: 4764301 (1988-08-01), Awazu et al.
patent: 4837481 (1989-06-01), Verstegen et al.
patent: 4891550 (1990-01-01), Northrop et al.
patent: 5043308 (1991-08-01), Luetkins Jr., et al.
1. Bernadette Saubat, et al., "Synthesis and Structural Study of the New Rare Earth Magnesium Borates LnMgB O (Ln=La, . . . , Er)", Journal of Solid State Chemistry, vol. 34, pp. 271-277 (1980).
2. T. Welker, "Recent Developments on Phosphors for Fluorescent Lamps and Cathode-Ray Tubes", Journal of Luminescence, vols. 48 and 49, pp. 49-56 (1991).
3. Smets: Mater. Chem. and Phys., vol. 16, pp. 286-299 (1987).

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