金属学报  1987, Vol. 23 Issue (1): 132-137

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CaO掺杂的ZrO_2陶瓷的化学扩散

窦士学;C.R.Masson;P.D.Pacey

东北工学院;加拿大国家科学委员会大西洋实验室;加拿大达尔豪斯大学化学系

CHEMICAL DIFFUSION IN CALCIA-STABILIZED ZIRCONIA CERAMIC

DOU Shixue (Northeast University of Technology.Shenyang);MASSON;C.R. (Atlantic Research Laboratory;NRC of Canada;Halifax.NS);PACEY;P.D. (Dalhousie University.Halifax.NS Canada)

窦士学;C.R.Masson;P.D.Pacey. CaO掺杂的ZrO_2陶瓷的化学扩散[J]. 金属学报, 1987, 23(1): 132-137.
, , . CHEMICAL DIFFUSION IN CALCIA-STABILIZED ZIRCONIA CERAMIC[J]. Acta Metall Sin, 1987, 23(1): 132-137.

摘要 参考文献 相关文章 Metrics 全文: PDF(515 KB)   摘要: 在960到1450℃的温度范围内,利用非稳定态渗氧法和解吸氧法研究了氧在CaO 掺杂的 ZrO_2(CDZ)中的化学扩散.发现在 CDZ 中过剩氧浓度与杂质氧化铁的含量成正比.化学扩散系数()与对化学计量的相对偏离成反比,并随氧压增加而增大.本文结果在实验上证实了“电子捕捉”机理.CDZ 样品与周围气氛达到平衡所需时间随捕捉中心的浓度增加而增长.不含 Fe_2O_3的 CDZ 固体电解质可对电动势作出快速响应. Abstract：Chemical diffusion of oxygen in calcia-stabilized zirconia(CSZ)with impu- rifles of Al_2O_3,SiO_2,MgO,Fe_2O_3 and TiO_2 was studied by the non-steady state permeation and the desorption techniques at 960—1450℃.The concentration of excess oxygen in CSZ was found to be proportional to the content of iron oxide within experimental error.The chemical diffusion coefficient was found to be inversely proportional to the relative deviation from stoichiometry,and to incr- ease with increasing Po_2.The results were consistent with a trapping mechanism in which the holes are divided into free and trapped ones.Diffusion coefficient is reduced by the trapping factor.The time constant of equilibration processes with a surrounding atmosphere is increased as the concentration of the trapping centers is increased.The CDZ electrolyte free of Fe_2O_3 gives fast response in EMF. 收稿日期: 1987-01-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 窦士学 C.R.Masson P.D.Pacey 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I1/132 1 Smith A W,Meszaros F,Amata C D.J Am Ceram Soc,1966;49:240 2 Hartung R,Moebius H H.Z Phys Chem,1970;243:133 3 Palguev S F,Gilderman V K,Neujmin A D.J Electrochem Soc,1975;122:745 4 Heyne L,Beckmans N M.Proc Br Ceram Soc,1971;19:229 5 Kitazawa K,Coble R L.J Am Ceram Soc,1974;57:360 Barrer R M.Diffusion in and Through Solids,New York:Cambridge Univ.Press,1951 7 Masson C R,Whiteway S G,Collings C A.J Am Ceram Soc 1963;42:745 8 Alcock C B,Chan J C.Can Metall Q,1972;11:559 9 Morin F.Can Metall Q,1975;14:97 10 Wagner C.Z Phys Chem,1933;B21:25 11 Heyne L.In:Geller G.ed.Solid Electrolytes,Berlin:S pringer-Verlay,1977;169-221Q No related articles found! Viewed Full text Abstract Cited   Shared      Discussed