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Titolo:
Phase diagram calculations of ZrO2-based ceramics with an emphasis on the reduction/oxidation equilibria of cerium ions in the ZrO2-YO1.5-CeO2-CeO1.5system
Autore:
Yokokawa, H; Sakai, N; Horita, T; Yamaji, K; Xiong, YP; Otake, T; Yugami, H; Kawada, T; Mizusaki, J;
Indirizzi:
Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan Natl InstAdv Ind Sci & Technol Tsukuba Ibaraki Japan 3058565 8565, Japan Tohoku Univ, Grad Sch Engn, Sendai, Miyagi 9808579, Japan Tohoku Univ Sendai Miyagi Japan 9808579 gn, Sendai, Miyagi 9808579, Japan Tohoku Univ, Res Inst Sci Measureements, Sendai, Miyagi 9808577, Japan Tohoku Univ Sendai Miyagi Japan 9808577 ts, Sendai, Miyagi 9808577, Japan
Titolo Testata:
JOURNAL OF PHASE EQUILIBRIA
fascicolo: 3, volume: 22, anno: 2001,
pagine: 331 - 338
SICI:
1054-9714(200106)22:3<331:PDCOZC>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRICAL-PROPERTIES; SOLID-SOLUTIONS; NONSTOICHIOMETRY; ELECTROLYTES; DIOXIDE; CEO2-X;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Yokokawa, H Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan Natl Inst Adv Ind Sci & Technol Tsukuba Ibaraki Japan 3058565
Citazione:
H. Yokokawa et al., "Phase diagram calculations of ZrO2-based ceramics with an emphasis on the reduction/oxidation equilibria of cerium ions in the ZrO2-YO1.5-CeO2-CeO1.5system", J PH EQUIL, 22(3), 2001, pp. 331-338

Abstract

Phase diagram calculations that were made previously for the ZrO2-MOm/2(m = 2, 3, 4) systems and for the ZrO2-YO1.5-MOm/2 (M = transition metals) systems have been extended to the ZrO2-YO1.5-CeO2(-CeO1.5) system to make an attempt to explain (1) thermogravimetric (TG) results as a function of oxygen potential, (2) electronic conductivity as a function of oxygen potential,and (3) a miscibility gap observed in air. The interaction parameters for the CeO2-CeO1.5-YO1.5 system were obtained from the reported oxygen nonstoichiometry in CeO2-x and rare earth doped ceria, (Ce,RE)O2-delta. The interaction parameters for the ZrO2-CeO2 subsystem were obtained so as to reproduce the observed miscibility gap at 1273 K, Those thermodynamic properties can reproduce consistently the experimental behaviors of the electronic conductivity and the TG results in the (Zr1-xCex)(0.8)Y0.2O1.9 solid solutions;these indicate the enhancement of reduction of CeO2.

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Documento generato il 05/07/20 alle ore 13:15:46