Preparation of yttria-gadolinia ceramic scintillators by sinteri

Details Preparation of yttria-gadolinia ceramic scintillators by sinteri Preparation of yttria-gadolinia ceramic scintillators by sinteri

1984-05-08

1985-05-21

Parrish, John A.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Optical fiber, waveguide, or preform

264 65, 264 85, 264325, C04B 3550

Patent

active

045185468

ABSTRACT:
Sintering and gas hot isostatic pressing are used to prepare polycrystalline yttria-gadolinia ceramic scintillator bodies. Multi-component powder compacts, formed by cold pressing cold isostatic pressing, are sintered to the closed porosity stage. The density of the sintered compacts is then increased by gas hot isostatic pressing. The finished scintillator includes Y.sub.2 O.sub.3, Gd.sub.2 O.sub.3, and one or more of Eu.sub.2 O.sub.3, Nd.sub.2 O.sub.3, Yb.sub.2 O.sub.3, Dy.sub.2 O.sub.3, Pr.sub.2 O.sub.3, and Tb.sub.2 O.sub.3 rare earth activator oxides. The finished scintillator may also include at least one of SrO and CaO as afterglow reducers.

REFERENCES:
patent: 3562371 (1971-02-01), Bush
patent: 3842012 (1974-10-01), Hoppenbrouwers
patent: 4007251 (1977-02-01), Isaksson
patent: 4040845 (1977-08-01), Richerson
patent: 4147744 (1979-04-01), Rhodes
patent: 4224524 (1980-09-01), Suys
patent: 4225653 (1980-09-01), Brixner
patent: 4242221 (1980-12-01), Cusano
Bucliono, "Callittoluminescent Property of the Rare Earth in Yttrium Oxide", J. Applied Physics, vol. 39, No. 9, Aug. 1968, pp. 4342-4347.
Rhodes, "Controlled Transient Solid Second Phase Sintery of Yttria", J. Am. Cir. Soc., vol. 64, No. 1, Jan. 1981, pp. 13-19.
Cornell, "Transparent Gd.sub.2 O.sub.3 Ceramics and Phorphors", Mat. Res., Bull., vol, 7, pp. 647-654, 1972.
Greskowich, "Fabricatrion of Transparent ThO.sub.2 -Doped Y.sub.2 O.sub.3 ", Am. Cir. Soc. Bull., vol. 52, No. 3, pp. 473-478, (1973).

Affiliated with

Also associated with

Rating

Preparation of yttria-gadolinia ceramic scintillators by sinteri does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of yttria-gadolinia ceramic scintillators by sinteri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of yttria-gadolinia ceramic scintillators by sinteri will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1537421