| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sintered compact which is composed of an oxide having a high Seebeck coefficient as a raw material, has good electric conductivity even in a polycrystalline sintered compact and can exhibit high thermoelectric conversion efficiency, and a method for manufacturing the same. <P>SOLUTION: The method for manufacturing the multiple oxide sintered compact includes molding a multiple oxide crystalline powder satisfying following conditions (i) and (ii), then sintering the molding: (i) The sintered compact has the composition expressed by general formula: Ca<SB>a</SB>A<SP>1</SP><SB>b</SB>Co<SB>c</SB>A<SP>2</SP><SB>d</SB>O<SB>e</SB>(where A<SP>1</SP>is one or ≥2 kinds of the elements selected from the group composed of Na, K, Li, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Pb, Sr, Ba, Al, Bi, Ag, Y, and lanthanoids; A<SP>2</SP>is one or ≥2 kinds of the elements selected from the group composed of Ti, V, Cr, Mn, Fe, Ni, Cu, Mo, W, Nb, Ta, Bi and Ag; and 2.2≤a≤3.6; 0≤b≤0.8; 2≤c≤4.5; 0≤d≤2; 8≤e≤10) and (ii) the sintered compact contains ≥90% crystal of ≥3 μm in the length on the longest side, wherein the average length of the length on the longest side is 5 to 100 μm and the ratio of the crystal present within a range of the average value ±50% is ≥50%. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
