Patent number: 10011770
Abstract: A crystal material that is represented by a general formula (1): (RExA1-x-y-sByM?s)2+?(Si1-t,M?t)2+?O7+? (1), the crystal material having a pyrochlore type structure, being a nonstoichiometric composition, and being a congruent melting composition, wherein in Formula (1), A contains at least one or more selected from Gd, Y, La, Sc, Yb, and Lu; B contains at least one or more selected from La, Gd, Yb, Lu, Y, and Sc; 0.1?y<0.4; RE contains at least one or more selected from Ce, Pr, Nd, Eu, Tb, and Yb; 0<x<0.1; M? and M? contain at least one or more 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<|?|<0.3 and 0?|?|<0.3 and 0?|?|<0.5.
Type:
Grant
Filed:
May 27, 2016
Date of Patent:
July 3, 2018
Assignees:
TOHOKU UNIVERSITY, C&A CORPORATION
Inventors:
Shunsuke Kurosawa, Akira Yoshikawa, Kei Kamada, Yuui Yokota, Yuji Ohashi, Takahiko Horiai, Yasuhiro Shoji, Rikito Murakami