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요업학회지 = Journal of the Korean Ceramic Society v.34 no.7, 1997년, pp.722 - 730   피인용횟수: 1

전하 적정법에 의한 $UO_{2+x}$$(Er_{0.06}U_{0.94})O_{2+x}$ 의 Nonstoichiometry (x) 측정
Measurement of Nonstoichiometry (x) of $UO_{2+x}$ and $(Er_{0.06}U_{0.94})O_{2+x}$ by a Coulometric Titration Method

강선호    (서울대학교 재료공학부   ); 이종호    (서울대학교 재료공학부   ); 유한일    (서울대학교 재료공학부   ); 김한수    (원자력연구소   ); 이영우    (원자력연구소  );
  • 초록

    The nonstoichiometry (x) of UO2+x and (Er0.06U0.94)O2+x has been in-situ measure against oxygen activity (Po2) at elevated temperatures by a coulometric titration method. From the dependence of the oxygen excess (x) of UO2+x on Po2 at 1000℃, it has been concluded that (2Vo2Oia2Oib)〃〃and (2Vo2Oia2Oib)' clusters are prevailing at low oxygen partial pressure [log(Po2/atm) -10.6] and at high oxygen partial pressure [log(Po2/atm) -10.6], respectively. The nonstoichiometry is found to be reduced with the addition of Er, which is ascribed to the fact that the fixed-valent Er3+ reduces the oxidation capacities of UO2+x. The enthalpy of oxygen incorporation in (Er0.06li0.94)O2+x has been evaluated from the mean valences of U-ion as -180±70 kJ/mole.


  • 주제어

    Nonstoichiometry .   $UO_{2+x}$ .   Er-doped $UO_{2+x}$ .   Coulometric titration.  

  • 참고문헌 (34)

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  • 이 논문을 인용한 문헌 (1)

    1. Kang, Sun-Ho ; Yoo, Han-Ill ; Kim, Han-Soo ; Lee, Young-Woo 1998. "Nonstoichimetry (x) of Nuclear Materials UO2+x and $(Ce_yU_{1-y})O_{2+x}$ at High Temperatures as a Function of Oxygen Activity$(a_o_2)$" The Korean journal of ceramics, 4(2): 78~82     

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  • 강선호 (4)

    1. 1994 "전하적정법에 의한 $(Mg_{0.29}Fe_{0.71})_{3-}\deltaO_4$ 훼라이트의 Nonstoichiometry$(\delta)$와 상안정 영역 결정" 요업학회지 = Journal of the Korean Ceramic Society 31 (12): 1491~1500    
    2. 1995 "$(Mg_{0.29}-yMnyFe_{0.71})_{3-}\delta$O_4$ 훼라이트계의 상평형" 요업학회지 = Journal of the Korean Ceramic Society 32 (3): 394~402    
    3. 1998 "Nonstoichimetry (x) of Nuclear Materials UO2+x and $(Ce_yU_{1-y})O_{2+x}$ at High Temperatures as a Function of Oxygen Activity$(a_o_2)$" The Korean journal of ceramics 4 (2): 78~82    
  • Yoo, Han-Ill (18)

  • Kim, Han-Soo (13)

  • 이영우 (23)

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