Zobrazeno 1 - 10
of 31
pro vyhledávání: '"V. A. Obolonchik"'
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 14:136-139
1. It is shown that ternary chromium selenides of composition MeCr2Se4 (where Me = Fe, Cu, Zn, or Cd) can be synthesized by reacting mixtures of simple oxides with hydrogen selenide. 2. The MeCr2Se4 compounds obtained in this work were found to be se
Autor:
A. I. Yuga, I. M. Fedorchenko, I. I. Beloborodov, V. A. Obolonchik, V. S. Klimenko, É. T. Mamykin, A. V. Nenakhov
Publikováno v:
Soviet Materials Science. 8:173-176
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 15:563-569
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 21:728-731
As a result of the crystallization of La tellurite specimens accompanying the raising of heat treatment temperature, the refractive index of the compound increases, isotropic particles with cubic structure symmetry become replaced by grains of long p
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 15:184-188
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 10:744-747
1. A study was made of the thermal stability of tungsten and molybdenum disulfides, molybdenum, tungsten, and niobium diselenides, and boron nitride at temperatures of 1050–1350‡C. 2. It was established that, in the temperature range 1000–1250
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 7:713-717
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 9:236-242
Autor:
V. A. Obolonchik, L. M. Prokoshina
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 10:619-622
1. Titanium diselenide can be prepared by reacting selenium vapor with metallic titanium powder in an inert gas (helium, argon) stream at temperatures of 900–1200°C. 2. The reaction of hydrogen selenide with titanium yields stable titanium hydride
Publikováno v:
Soviet Powder Metallurgy and Metal Ceramics. 4:877-881
A study was made of the reaction of metallic niobium and tantalum powders with hydrogen sulfide; niobium sulfide, NbS1.6, was obtained at 1000–1300°C and tantalum disulfide at 1400°C. The lattice parameters and pycnometric density of the sulfides