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Volume 1979 (1979)
- Issue 163 Pages 222-
- Issue 162 Pages 175-
- Issue 161 Pages 109-
- Issue 160 Pages 83-
- Issue 159 Pages 48-
- Issue 158 Pages 2-
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Volume 1979, Issue 162
Displaying 1-5 of 5 articles from this issue
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Yasuo AZUMA, Masahiro MIZUIDE, Kensuke SUEHIRO1979 Volume 1979 Issue 162 Pages 175-183
Published: September 01, 1979
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSAlkaline earth peroxides, i. e. MgO2·nH2O, CaO2, SrO2 and BaO2 were synthesized, and the influence of atmosphere on the thermal decomposition of the peroxides was examined by means of measurement of active oxygen content, X-ray diffraction, TG and DTA.
In O2 or Ar, magnesium peroxide decomposed in two steps, but other peroxides in one step. The decomposition temperatures of Sr and Ba peroxides were elevated by the presence of O2, and the linear relationship was found between the reciprocal of decomposition temperature and the logarithm of partial pressure of oxygen. On the other hand, the decomposition of all peroxides was accelerated under the atmospheres of H2O (P =23. 7 mmHg) and CO2.
From the results of X-ray diffraction analysis, magnesia produced on decomposition of the peroxide was initially amorphous and turned into a crystalline form. In the course of decomposition of Ca and Sr peroxides, each peroxide and oxide coexisted. It was found that the lattice constant of c-axis of Ba peroxide decreased at the intermediate step of decomposition.View full abstractDownload PDF (1509K) -
Yasuo ARAI1979 Volume 1979 Issue 162 Pages 185-194
Published: September 01, 1979
Released on J-STAGE: March 07, 2011
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Kazuo KATO, Hideki AOKI1979 Volume 1979 Issue 162 Pages 195-200
Published: September 01, 1979
Released on J-STAGE: March 07, 2011
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Michel MURAT, Takaya IIDA, Katsumi SETOYAMA1979 Volume 1979 Issue 162 Pages 201-206
Published: September 01, 1979
Released on J-STAGE: March 07, 2011
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Kenichi TOKORO1979 Volume 1979 Issue 162 Pages 206-212
Published: September 01, 1979
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSDownload PDF (825K)
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