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cemented carbides producing. The industrially established method of preparing tungsten and carbide is the hydrogen reduction of tungsten oxide, tungstic acid or ammonium para tungstate at 900-1 200......
(industrial reagent, >99.4%) and SiO2 powders (industrial reagent, >99.2%). Before the CVR, they were initially washed by dilute hydrochloric acid to remove the impurities, and then dried at 373 K......
was broken by ethanol, washed with dilute hydrochloric acid solution once, and then with acetone and ethanol alternately three times. The useless liquor was removed by centrifugation. Eventually......
analysis (YS/T53P.6-2006, Ammonium phosphate precipitation-acid-base titration), and the contents of other elements, such as Li, Na and K, were detected by inductively coupled plasma atomic emission...-precipitation [J]. Journal of Power Sources, 2005, 146: 539-543. [10] Lala S M, Montoro L A, Rosolen J M. LiCoO2 sub-microns particles obtained from micro-precipitation in molten stearic acid [J]. Journal......
sulfate pentahyrate (CuSO4?5H2O, AR), sodium laurylsulfonate (SDS, CP) and sulfate acid H2SO4, AR) were used as starting materials without further purification. 2.2 Synthesis Two pieces of copperplate......
]. Materials Science and Engineering A, 2007, A459: 117-123. [5] pINC W, GENG S, O'KEEFE M, FAHRENHOLTZ W, O'KEEFE T. Effects of acid and alkaline based surface preparation on spray deposited cerium......
GPa, a fracture extensibility of 37.5%, a density of 1.36-1.40 g/cm3 and a high acid and alkaline resistance. Distilled water was used throughout experiments. 2.2 Methods It was found that PP fiber......
. [11] MOR?O A I C, ALVES A M B, AFONSO M D. Concentration of clavulanic acid broths: Influence of the membrane surface charge density on NF operation [J]. J Membr Sci,2006, 281(1/2): 417-428. [12] DING......
Laboratory Press, 2001. [10] MARMUR J, DOTY P. Determination of the base composition of deoxyribonucleic acid from thermal denaturation temperature [J]. Journal Molecular Biology, 1962, 5: 109-118. [11......
technique using a solution of 21% perchloric acid, 50% methanol and 29% n-butyl alcohol at -30 ℃. Microstructural examinations were performed using an MEF4A optical microscope, a JSM-6301F SEM......