| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a Sc<SB>2</SB>O<SB>3</SB>-ZrO<SB>2</SB>system solid electrolyte superior in ion conductivity especially in low temperature regions (in the vicinity of 600°C to 800°C), a manufacturing method of the solid electrolyte, and furthermore a solid oxide fuel cell and an oxygen sensor using such solid electrolyte. <P>SOLUTION: By molding a powder having a composition expressed by (1-x)ZrO<SB>2</SB>+xSc<SB>2</SB>O<SB>3</SB>(x=0.03 to 0.15) by an isostatic pressing, and after calcining it within temperature ranges over 1,400°C and below 1,650°C, and by furthermore applying a heat treatment by hot isostatic pressure sintering under high temperature and high pressure atmosphere containing oxygen, a nanocrystal layer of the same component having the thickness of 1 to 10 nm is formed in the crystal grain boundary of the zirconia sinter. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
