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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 10, Number 4
JKCSEZ 10(4)
August 20, 1966 

The Oxidation of Specpure Nickel

Specpure Nikel의 Oxidation
Jae-Shi Choi, Soo-Hee Sin, Kyu-Yong Lee

최재시, 신수희, 이규용
순수한 nickel의 산화에 대하여 대기중에서와 각종 산소압력하 500°∼ 800 ℃에서 석영제 미량천칭을 사용하여 그 속도를 측정하였다. Nickel의 연도상수는 Parabolick rate Law에 의하여 계산하였다. 활성화 에너지는 Arrhenius식에 의하여 구하였으며 Eact= 35.4 ±1.5 Kcal/mole을 얻었다. Nickel산화에서 산화속도상수는 산소압력의 1/4.93승에 비례함을 확인하였고 Nickel의 산화기구는 Oxide Film에 용해되어 과잉으로 존재하는 산소에 의해서 형성된 양이온 Vacancy (공위)에 의존한다는 결론에 도달하였다.

The measurement of Oxidation of nickel has been investigated using vacuum quartz microbalance in the temperature range of 500°∼ 800 ℃ at various oxygen pressure. The rate constants of nickel-oxidation were evaluated according to the parabolic rate law. From the Arrhenius equation, the activation energy in the range of experimental temperatures were found that Eact= 35.4 Kcal/mole. It was also found that the parabolic rate constants varied approximately as the one fifth power of the oxygen pressure for nickel-oxidation. The mechanism for the oxidation of this metal were seemed to be via cation vacancy produced by excess of oxygen dissolved in the oxide film.

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