報告書番号

W94003

タイトル（和文）

ＳＯＦＣ構成材料の研究－ランタンコンセントレートマンガナイトのＳＯＦＣ支持体への適合性－

タイトル（英文）

SOLID OXIDE FUEL CELLS -COMPATIBILITY OF LANTHANUM CONCENTRATE MANGENITE WITH SUPPOTERS IN SOFCS-

概要 （図表や脚注は「報告書全文」に掲載しております）

高価な高純度Ｌａ２Ｏ３に代わり，比較的安価なランタンマンガナイトを合成した。また，導電率と熱膨張計数を測定し，ＳＯＦＣ支持体への適合性を検討した。

概要 （英文）

LAMNO3-BASED PEROVSKITES ARE BING INVESTIGATED FOR USE AS SOFC CATHODES AND SUPPORTES BECAUSE OF THEIR HIGH ELECTRICAL CONDUCTIVITY,CATALYTIC ACTIVITY AND EXCELLENCT COMPATIBILITY WITH YTTRIA-STABILIZED ZIRCONIA ELECTROLYTE. HOWEVER,HIGH-PURITY POWDERS LANTHANUM COMPOUNDS ATE QUITE EXPENSIVE. THE POSSIBILITY OF SYNTHESIZING A CATHODE USING CHEAP MATERIALS OFFERS A SIGNIFICANT ECONOMIC ADVANTAGE. LN1-XAXMNO3 (LN=LA,PR,CE,A=CA,SR) HAVE BEEN SYNTHESIZED USING THE CHEAPEST LANTHANUM-RICH INTERMEDIATES INSTEAD IS EXPENSIVE HIGH-PURITY LANTHANUM COMPOUNDS FOR USE AS SUPPORTERS IN SOFCS. LN1-CAX-MNO3 (0 X 0.3) AND LN1-X SRXMNO3 (0 X 0.2) SHOWED A SINGLE PHASE ORTHORHOMBIC SYMMETRY,AND LN0.7SR0.3MNO3 SHOWED A SINGLE HEXAGONAL PHASE. THE ELECTRICAL CONDUCTIVITY OF ORTHORHOMBIC-PHASE FROM 500 TO 1000 IS SEMICONDUCTIVE,WHILE LN0.7SR0.3MN3IS METALLIC. WITH INCREASING DOPANT CONTENT,THE CONDUCTIVITY RANGES FROM 80-200S /CM AT 1000 IN AIR. THESE RESULTS SUGGEST THAT LN1-XAXMNO3 (0 X 0.3) IS AN APPROPRIATE MATERIALS FOR SUPPORTERS IN SOFCS.

報告者

キーワード