| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a translucent LuAG sintered compact, which is a praseodymium-doped oxidized lutetium aluminum garnet (Pr:LuAG) polycrystal, obtained by vacuum sintering with excellent mass productivity, transparent and exhibiting excellent characteristics as a scintillator material, and a method for producing the same. Ž<P>SOLUTION: The translucent LuAG sintered compact, containing Pr and Si and having a linear transmittance, excluding specific absorption, of 60% or more for light having a wavelength of 300-800 mm at a thickness of 5 mm, is obtained by mixing powdered raw materials of alumina (Al<SB>2</SB>O<SB>3</SB>), lutetium oxide (Lu<SB>2</SB>O<SB>3</SB>), and praseodymium oxide (Pr<SB>6</SB>O<SB>11</SB>), each purity being 99.9 wt.% or more, and sintering them after adding silicon or a silicon-containing compound in amounts so that 20-300 wt.ppm of silicon remains in the sintered compact. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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