(Li_2O)_>35.7<(RE_2O_3)_>7.2<(SiO_2)_>57.1<(RE=Sm, Gd, Dy, Ho, Y, Er及びYb)ガラスの調製とそれらの電気特性

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Lithium rare-earth silicate glasses, (Li_2O)_>35.7< (RE_2O_3)_>7.2<(SiO_2)_>57.1< (RE = Sm, Gd, Dy, Ho, Y, Er and Yb), were prepared by melting a mixture of Li_2CO_3, RE_20_3 and SiO_2 under the composition ratio of each component. The density was increased with increasing the atomic weight of RE. Three differential thermal analy sis (DTA) exothermic peaks (T_c(I) , T_c(II) and T_c(III) ) , attributed to crystallization, were observed in the temperature range of 650 to 880 The powder X-ray diffraction analysis indicated that Li_2SiO_3, (Li_2SO_3 + RE_2Si_2O_7 + RE_2SiO_5) and (Li_2SO_3 + RE_2Si_2O_7) formed around T_c(I) , T_c(II) and T_c(III) , respectively. The conductivity of (Li_2O)_>35.7< (RE_2O_3)_>35.7< (RE_2O_3)_>7.2< (SiO_2)_>57.1< glass was found to increase about two orders of magnitude over that of the corresponding Li_5YSi_4O_12 ceramic.
社団法人日本セラミックス協会の論文
2002-03-01