The result of test for removing cadmium from crude indium by vacuum distillation shows that the rate of cadmium removal can be up to 97%-99% under the conditions of 450-500℃, 20-30Pa vacuum degree and 2h distillation.
On the condition that the temperature is 900-950℃,the time 15-20 min,the residual pressure 30-45 Pa ,and the melt depth 4-5.4 mm,the bismuth evapora- tion rate is more than 99%with the silver content in condensate being 68-170 ppm and the residue 45%-60%Ag by one stage vacuum distillation of crude bismuth containing 1.63%Ag.
Using SC(NH 2) 2 to leach bearing-high arsenic gold concentrates pretreated with vacuum evaporation,the gold leach rates of the concentrates can surpass 90%. As compared with the concentrate directly leached by SC(NH 2) 2,the leach rate of gold is raised about 80% and increased with decreasing in the arsenic content of the calcine.
The deposition of nanofilms on glass substrates by magnetron sputtering and thermal vacuum evaporation under the action of Aires fractal-matrix structurizers is analyzed.
The films are produced by magnetron sputtering or vacuum evaporation, and fractal topography is induced with Aires shapers.
The efficiencies of freezing techniques (freezing on a cooled metal surface or through vacuum evaporation) are compared with one another in respect to the dispersity of the prepared products, and the corresponding results are presented.
Processes of defect formation are investigated in epitaxial PbSe:Tl films prepared by vacuum evaporation from molecular beams at various condensation temperatures from mixtures with a thallium content of 0-1.6 at.
Arrays of GaAs whiskers on GaAs(111)B substrates were grown using a technique combining vacuum evaporation and molecular-beam epitaxy.