In recent years JSC "Krastsvetmet" has successfully developed the production of chemically pure compounds of precious metals.Currently methods have been developed and facilities have been provided for indust...In recent years JSC "Krastsvetmet" has successfully developed the production of chemically pure compounds of precious metals.Currently methods have been developed and facilities have been provided for industrial production of the following platinum metals compounds:Rhodium(Ⅲ) chloride hydrate,rhodium(Ⅲ) chloride solution,rhodium(Ⅲ) nitrate solution,rhodium(Ⅲ) iodide,rhodium(Ⅲ) sulfate,hydrated rhodium(Ⅲ) oxide,ammonium hexachlororodiate,rhodium(Ⅲ) phosphate solution,rhodium electrolytes;Iridium(Ⅳ) chloride hydrate,iridium(Ⅲ) chloride hydrate,ammonium hexachloroiridate(Ⅳ),hexa chloriridium acid solution,hexachloriridium crystalline acid;Ruthenium(Ⅲ) chloride hydrate,ruthenium(Ⅳ) hydroxide chloride,ruthenium(Ⅳ) hydroxide chloride solution,ammonium hexachlororuthenate,ruthenium(Ⅲ) chloride solution,potassium,diaquaoctachloronitrido diruthenate.The quality of the production meets the requirements of Russian and foreign consumers.展开更多
Nb_(3)Al nanoparticles were directly synthesized by metallothermic reduction process in the molten salts with mNbCl_(5)-nAlCl_(3) powders as raw materials and sodium as reducing reagent. The effects of different feedi...Nb_(3)Al nanoparticles were directly synthesized by metallothermic reduction process in the molten salts with mNbCl_(5)-nAlCl_(3) powders as raw materials and sodium as reducing reagent. The effects of different feeding material orders, soaking time, Nb content in raw materials, and 3NbCl_(5)-AlCl_(3) content in molten salts on the obtained Nb_(3)Al powder were discussed. The as-prepared samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), and transmission electron microscopy(TEM). It is found that the only phase Nb_(3)Al nanoparticles are obtained by controlling the variation of the feeding material orders, soaking time, and Nb content in raw materials. And the morphologies of as-prepared nanoparticles change owning to different 3NbCl_(5)-AlCl_(3) contents in molten salts.展开更多
文摘In recent years JSC "Krastsvetmet" has successfully developed the production of chemically pure compounds of precious metals.Currently methods have been developed and facilities have been provided for industrial production of the following platinum metals compounds:Rhodium(Ⅲ) chloride hydrate,rhodium(Ⅲ) chloride solution,rhodium(Ⅲ) nitrate solution,rhodium(Ⅲ) iodide,rhodium(Ⅲ) sulfate,hydrated rhodium(Ⅲ) oxide,ammonium hexachlororodiate,rhodium(Ⅲ) phosphate solution,rhodium electrolytes;Iridium(Ⅳ) chloride hydrate,iridium(Ⅲ) chloride hydrate,ammonium hexachloroiridate(Ⅳ),hexa chloriridium acid solution,hexachloriridium crystalline acid;Ruthenium(Ⅲ) chloride hydrate,ruthenium(Ⅳ) hydroxide chloride,ruthenium(Ⅳ) hydroxide chloride solution,ammonium hexachlororuthenate,ruthenium(Ⅲ) chloride solution,potassium,diaquaoctachloronitrido diruthenate.The quality of the production meets the requirements of Russian and foreign consumers.
基金the National Natural Science Foundation of China(Nos.50934001,21071014,51102015,and 51401004)the Fundamental Research Funds for the Central Universities(Nos.FRF-AS-11-002A,FRF-TP12-023A,and FRF-MP-09-006B)+2 种基金the National High Technology Research and Development Program of China(No.2012AA062302)the Program of the Co-Construction with Beijing Municipal Commission of Education of China(Nos.00012047 and 00012085)the Program for New Century Excellent Talents in University(No.NCET-11-0577)。
文摘Nb_(3)Al nanoparticles were directly synthesized by metallothermic reduction process in the molten salts with mNbCl_(5)-nAlCl_(3) powders as raw materials and sodium as reducing reagent. The effects of different feeding material orders, soaking time, Nb content in raw materials, and 3NbCl_(5)-AlCl_(3) content in molten salts on the obtained Nb_(3)Al powder were discussed. The as-prepared samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), and transmission electron microscopy(TEM). It is found that the only phase Nb_(3)Al nanoparticles are obtained by controlling the variation of the feeding material orders, soaking time, and Nb content in raw materials. And the morphologies of as-prepared nanoparticles change owning to different 3NbCl_(5)-AlCl_(3) contents in molten salts.
