白金-ロジウム・フィラメント上の溶融けい酸塩から真空中で放出される正, 負イオンについて

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Positive and negative ions from some molten silicates coated on a Pt-Rh(10%) filament have been measured using mainly a Hitachi RM-6E single-focusing mass spectrometer. The samples used are Li_2O-SiO_2(mole ratio 2 : 1 and 3 : 1), Na_2O-SiO_2(1 : 1 and 2 : 1), K_2O-SiO_2(1 : 1), Cs_2O-SiO_2(1 : 1), PbO-SiO_2(2 : 1), Li_2O-PbO-SiO_2(2 : 1 : 1 and 1 : 1 : 2), and K_2O-PbO-SiO_2 (2 : 1 : 3). The temperatures of samples are read with an optical pyrometer, but the readings can not be corrected for emissivity and window transmission. The apparent temperature range is between 800℃ and 1400℃. The negative ions O-, O_2-, SiO_3-, MSiO_3- (M=Li, K, and Cs), RhO_2-, RhO-_3, and PtO_2- are found for all the systems investigated, except PbO-SiO_2(2 : 1) and Li_2O-PbO-SiO_2(1 : 1 : 2). The proportions of these ions from K_2O-PbO-SiO_2 and K_2O-SiO_2 are particularly large compared with those from the other systems. When PbO is added to a K_2O-SiO_2 system, the lowest temperature at which the negative ions are detected is lowered. The intensities of these ions are also increased by the addition of PbO. The positive ions M+, M_2+, M_2O+ (M=Li, Na, K, and C_3), O, + O_2+, and Si+ are obtained from all systems, except PbO-SiO_2 (2 : 1). The ions Li_3O+ and Li_3SiO_3+ are found in the mass spectra of Li_2O-SiO_2 and Li_2O-PbO-SiO_2. The ions containing Pb, such as LiPbO+, are found in the mass spectra of Li_2O-PbO-SiO_2.
社団法人日本鉄鋼協会の論文
1972-09-01

白金-ロジウム・フィラメント上の溶融けい酸塩から真空中で放出される正, 負イオンについて

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