Kasei Optonix, Ltd.

Mitsubishi Chemical Corporation

Mitsubishi Chemical Industries Limited

Mitsubishi Kasei Corporation

Etsuo Shimizu

Yujiro Suzuki

Norio Miura

Keiji Shimiya

Hidehiko Maeoka

Yuji Aoki

Hideo Suzuki

Naoto Kijima

Noboru Kotera

Yasuo Shimomura

Minoru Tanaka

Yukinori Minagawa

Teiichi Hitomi

Shinichi Onogi

Kitaro Shigeta

Takashi Johnokuchi

Kumie Shimizu, Legal Representative

Takeshi Akiwa

Keiko Matsuo

To provide a phosphor having nearly spherical shapes, the phosphor has an elemental ratio represented by the formula below, and contains at least two kinds of Li, Na, K, Rb, Cs, P, Cl, F, Br, I, Zn, Ga, Ge, In, Sn, Ag, Au, Pb, Cd, Bi and Ti.MMMO(Mrepresents Cr, Mn, Fe, Co, Ni, Cu, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm or Yb, Mmainly represents a bivalent metal element, Mmainly represents a trivalent metal element, and a, b, c and d are 0.0001&#x2266;a&#x2266;0.2, 0.8&#x2266;b&#x2266;1.2, 1.6&#x2266;c&#x2266;2.4 and 3.2&#x2266;d&#x2266;4.8, respectively.)

Phosphor and production method thereof, and phosphor-containing composition, light emitting device, image display and lighting system

Gadorinium oxysulfide phosphor for digital radiography, radiographic image conversion screen and radiograph-forming device

Rare earth oxysulfide phosphor and X-ray detector using the same

A calcium tungstate phosphor which comprises calcium tungstate as a host and vanadium, wherein the proportion of the vanadium to the calcium tungstate is within a range of from 0.01 to 30 ppm. The phosphor is produced by forming a solid calcium tungstate precipitate from an aqueous medium containing ammonia, calcium ion, tungstate ion and vanadate ion and firing the precipitate in the presence of fluxing material.

Process for producing calcium tungstate phosphor

A radiographic intensifying screen comprising a support and a fluorescent layer formed thereon, said fluorescent layer consisting essentially of at least one terbium-activated rare earth oxysulfide phosphor of the formula:

Radiographic intensifying screen

A rare earth phosphor comprising a rare earth oxyhalide phosphor body and cinnamic acid which may have a hydrophobic substituent and which is adhered to or brought in contact with the phosphor body.

Rare earth phosphor and radiographic image conversion screen

A radiographic intensifying screen comprising a support and a fluorescent layer formed on the support, characterized in that said fluorescent layer is composed essentially of a rare earth oxysulfide phosphor represented by the formula:

A radiographic image conversion screen comprises a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth phosphor.

Radiographic image conversion screens

A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth oxysulfide phosphor. The green emitting rare earth oxysulfide phosphor is represented by the formula: (Ln.sub.1-i, Yi, Tba, Rb).sub.2 O.sub.2 S where Ln is at least one element selected from the group consisting of La, Ga and Lu, R is at least one element selected from the group consisting of Dy, Pr, Yb and Nd, and i, a and b are numbers within the ranges of 0.ltoreq.i.ltoreq.0.35, 0.0005.ltoreq.a.ltoreq.0.09 and 0.0002.ltoreq.b.ltoreq.0.01 respectively.

A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer consisting essentially of a green emitting rare earth phosphor.

A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth oxysulfide phosphor. The green emitting rare earth oxysulfide phosphor is represented by the formula: (Ln.sub.1-i, Y.sub.i, Tb.sub.a, R.sub.b).sub.2 O.sub.2 S where Ln is at least one element selected from the group consisting of La, Gd and Lu, R is at least one element selected from the group consisting of Dy, Pr, Yb and Nd, and i, a and b are numbers within the ranges of 0.ltoreq.i.ltoreq.0.35, 0.0005.ltoreq.a.ltoreq.0.09 and 0.0002.ltoreq.b.ltoreq.0.01, respectively.

Growing community of inventors

Tokyo, Japan

Etsuo Shimizu