Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Patent
1997-03-13
1998-12-22
Bonner, Melissa
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
2523014F, 264 21, C09K 1108
Patent
active
058514287
ABSTRACT:
A raw material prepared by washing a phosphor powder containing a phosphor host material and an activator with an acid solution, followed by drying the washed powder, is heated within a thermal plasma at a temperature which permits partially melting the phosphor, followed by cooling and subsequently subjecting the resultant phosphor at 1200.degree. to 1700.degree. C., thereby manufacturing spherical phosphor particles having a concentration gradient in a radial direction.
REFERENCES:
patent: 5644193 (1997-07-01), Matsuda et al.
J. Electrochem. Soc.: Solid-State Science and Technology, vol. 123, No. 10, pp. 1493-1497, Oct. 1976, S. Ignasiak, et al., "Line Emission Penetration Phosphors: Preparation and Cathodolumniescent Properties".
Albessard Keiko
Inoue Yoshiaki
Kawasaki Kazuhiro
Matsuda Naotoshi
Motoki Shinjiro
Bonner Melissa
Kabushiki Kaisha Toshiba
Neturen Co. Ltd.
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