Coulometric Titration Study on the Nonstoichiometry in Copper Doped Cobaltous Oxide ((<TEX>${Co_{1-x}}{Cu_x}$</TEX>)<TEX>$_{1-delta}$</TEX> O

, 이종호; , Michael Schroeder; , Manfred Martin; , 이해원; , 이종호; , Michael Schroeder; , Manfred Martin; , 이해원

J. Korean Ceram. Soc. > Volume 37(8); 2000 > Article

Journal of the Korean Ceramic Society 2000;37(8): 799.

전하적정법에 의한 (${Co_{1-x}}{Cu_x}$)$_{1-delta}$ O의 산소 부정비량 측정

Coulometric Titration Study on the Nonstoichiometry in Copper Doped Cobaltous Oxide ((${Co_{1-x}}{Cu_x}$)$_{1-delta}$ O

이종호 , Michael Schroeder ¹, Manfred Martin ¹, 이해원 ²

Institute of Phys. Chem., Darmstadt University of Technology, 한국과학기술연구원 세라믹공정연구센터
¹Institute of Phys. Chem., Darmstadt University of Technology
²한국과학기술연구원 세라믹공정연구센터

ABSTRACT

Coulometric titration experiments have been done for copper doped cobaltous oxide (Co1-xCux)1-$delta$ O with various dopant concentrations. We present the obtained experimental data and compare our results to those of previous thermogravimetric investigation. The experimental data are fitted by theoretical calculations based on various defect models. For this modeling, we considered different types fo major defects like copper in substitutional and interstitial lattice sites as well as copper vacancy. We also introduced the copper evaporation effect during titration experiment into our consideration.

Key words: (${Co_{1-x}}{Cu_x}$)$_{1-\delta}$ O, Coulometric titration, Nonstoichiometry, Evaporation effect