Mass spectrometric study of vaporization of lithium fluoride.
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概要
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The vaporization of lithium fluoride was studied by using a mass spectrometer attached with a tungsten Knudsen cell over a temperature range of 1, 006-1, 200 K. As the ion species, Li<SUP>+</SUP>, LiF<SUP>+</SUP>, Li<SUB>2</SUB>F<SUP>+</SUP> and Li<SUB>3</SUB>F<SUB>2</SUB><SUP>+</SUP> were identified, where Li<SUP>+</SUP> and LiF<SUP>+</SUP> were mainly attributed to the monomer (LiF) as their precursor. While, Li<SUB>2</SUB>F<SUP>+</SUP> and Li<SUB>3</SUB>F<SUB>2</SUB><SUP>+</SUP> were identified to be formed from the dimer (Li<SUB>2</SUB>F<SUB>2</SUB>) and the trimer (Li<SUB>3</SUB>F<SUB>3</SUB>), respectively. Partial vapor pressures of these vapor species were obtained by estimating their relative ionization cross sections and comparing their peak heights with those of the internal standard. The heats of vaporization of the monomer, dimer and trimer were obtained by the second law as well as the third law treatments. The heats of vaporization of liquid lithium fluoride were obtained by approximation through differentiation of the quadric regression curves of partial vapor pressures. The fairly good agreement was attained between the second law and the third law heats of vaporization.
- 一般社団法人 日本原子力学会の論文
著者
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Yasumoto Masaru
Research Center For Nuclear Science And Technology University Of Tokyo
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Kanno Masayoshi
Department Of Applied Chemistry Tokyo Metropolitan University
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yamawaki Michio
Research Center for Nuclear Science and Technology, University of Tokyo
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YASUMOTO Masaru
Research Center for Nuclear Science and Technology, University of Tokyo
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HIRAI Mutsumi
Department of Nuclear Engineering, Faculty of Engineering, University of Tokyo
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