CRYSTAL MATERIAL, CRYSTAL PRODUCTION METHOD, RADIATION DETECTOR, NON-DESTRUCTIVE INSPECTION DEVICE, AND IMAGING DEVICE

• Main Authors: SHOJI, Yasuhiro, YOKOTA, Yuui, MURAKAMI, Rikito, OHASHI, Yuji, KAMADA, Kei, KUROSAWA, Shunsuke, HORIAI, Takahiko, YOSHIKAWA, Akira
• Format: Patent
• Language: English; French; Japanese
• Published: 01.12.2016
• Subjects: ADHESIVES; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; CRYSTAL GROWTH; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INORGANIC CHEMISTRY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PHYSICS; POLISHES; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SEMICONDUCTOR DEVICES; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; TESTING; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

A crystal material having a pyrochlore structure, non-stoichiometric composition, and congruent melting composition represented by general formula (1): ＲＥxＡ１－x－y-ｓＢｙＭ'ｓ）２+α（Ｓｉ１－ｔ,Ｍ"ｔ）２+βＯ７+γ. Wherein A includes at least one selected from Gd, Y, La, Sc, Yb, and Lu; B includes at least one selected from La, Gd, Yb, Lu, Y, and Sc; ０.１ ＜ ｙ ＜ ０．４; RE includes at least one selected from Ce, Pr, Nd, Eu, Tb, and Yb; ０ ＜ ｘ ＜ ０．１; M' and M'' include at least one selected from Ｌｉ，Ｎａ，Ｋ，Ｍｇ，Ｃａ，Ｓｒ，Ｂａ，Ｔｉ，Ｚｒ，Ｈｆ，Ｆｅ、Ｔａ，and W; ０ ≦ ｓ ＜ ０．０１ and ０ ≦ ｔ ＜ ０．０１; and ０ ＜ |α| ＜０．３, ０ ≦ |β| ＜ ０．３, and ０ ≦ |γ| ＜ ０．５. La présente invention concerne un matériau cristallin présentant une structure pyrochlorée, une composition non stœchiométrique, et une composition à fusion harmonieuse représentée par la formule générale (1) : RExA1-x-y-sByM's)2+α(Si1-t,M''t)2+βO7+γ. Où A inclut au moins l'un sélectionné parmi Gd, Y, La, Sc, Yb, et Lu ; B inclut au moins l'un sélectionné parmi La, Gd, Yb, Lu, Y, et Sc ; O.1 < y < 0,4 ; RE inclut au moins l'un sélectionné parmi Ce, Pr, Nd, Eu, Tb, et Yb ; 0 < x < 0,1 ; M' et M'' incluent au moins l'un sélectionné parmi Li, Na, K, Mg, Ca, Sr, Ba, Ti, Zr, Hf, Fe, Ta, et W ; 0 ≤ s < 0,1 et 0 ≤ t < 0,01 ; et 0 < |α| < 0,3, 0 ≤ |β| < 0,3 et 0 ≤ |γ| < 0,5. 一般式（１）：（ＲＥxＡ１－x－y-ｓＢｙＭ'ｓ）２+α（Ｓｉ１－ｔ,Ｍ"ｔ）２+βＯ７+γで表され、パイロクロア型構造を持ち、非化学量論的組成、調和溶融組成である結晶材料。ＡはＧｄ、Ｙ、Ｌａ、Ｓｃ、Ｙｂ及びＬｕから選択される少なくとも１種以上を含み、ＢはＬａ、Ｇｄ、Ｙｂ、Ｌｕ、Ｙ及びＳｃから選択される少なくとも１種以上を含み、０.１＜ｙ＜０．４であり、ＲＥはＣｅ、Ｐｒ、Ｎｄ、Ｅｕ、Ｔｂ、Ｙｂから選択される少なくとも１種以上を含み、０＜ｘ＜０．１であり、Ｍ'およびＭ"はＬｉ，Ｎａ，Ｋ，Ｍｇ，Ｃａ，Ｓｒ，Ｂａ，Ｔｉ，Ｚｒ，Ｈｆ，Ｆｅ、Ｔａ，Ｗから選択される少なくとも１種以上を含み、０≦ｓ＜０．０１且つ０≦ｔ＜０．０１であり、０＜|α|＜０．３且つ０≦|β|＜０．３且つ０≦|γ|＜０．５で表される。