Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Patent
1994-12-22
1997-03-11
Bonner, Melissa
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
423263, 423518, C09K 1100
Patent
active
056097930
ABSTRACT:
A fluorescent substance is comprised of a rare earth oxysulfide represented by the chemical formula, R.sub.2(1-x) Pr.sub.2x O.sub.2 S, wherein R stands for at least one member selected from the group consisting of Y, Gd, La, and Lu and x for a numerical value satisfying the expression, 5.times.10.sup.-5 .ltoreq.x.ltoreq.1.times.10.sup.-2, and has a linear absorption coefficient of not more than 6.0 cm.sup.-1 at 550 nm. And further fluorescent substance contains PO.sub.4 in an amount of not more than 100 ppm.
REFERENCES:
patent: 3502590 (1970-03-01), Royce et al.
patent: 4863882 (1989-09-01), Matsuda et al.
patent: 5296163 (1994-03-01), Leppert et al.
Chemical Abstract citation: 88:82738a, Kubo et al, Oct. 1, 1977.
"Section I. Basic Principles of Computed Tomography Detectors", Haque et al Radiology of the Skull and Brain, 5:4097-4130 (1980) no month.
"Study on Optical Properties of Ceramics Scintillator for X-Ray CT Equipment (Part 1 )", Nakamura et al., Journal of the Ceramic Society of Japan, 101(10):115-119 (1993) no month.
"Ceramic Scintillators for Advanced, Medical X-Ray Detectors", Greskovich et al., American Ceramic Society Bulletin, 71(7):1120 (1992) Jul.
"Recent Developments in Scintilation Detectors For X-Ray CT and Positron CT Applications", M. R. Farukhi, IEEE Trans. Nucl. Sci., NS-29, (1982) no month.
Fukuta Yukihiro
Yokota Kazuto
Bonner Melissa
Kabushiki Kaisha Toshiba
LandOfFree
Fluorescent substance, method for production thereof, radiation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluorescent substance, method for production thereof, radiation , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluorescent substance, method for production thereof, radiation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-440804