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and military applications due to its properties of high melting point, high hardness, large density and high strength at elevated temperatures [1-4]. To obtain high-purity tungsten products, ammonium... decomposes in the leaching process, with 150-160 mg/L silicon thermodynamically at 25 °C. The dissolved silicon can be removed by magnesium salts via forming insoluble MgSiO3. The low carbonate and high......
Hui, SHI Xi-chang, CHEN Ya, YAN Guo-chun. Separation technique for boron and magnesium from salt lake brine and preparation of high-purity magnesium oxide [J]. The Chinese Journal of Nonferrous Metals... on average. Chinese boron ores mainly include ascharite, ludwigite and salt lake boron ore [1-3]. With the high demand of boron resources, ascharite is running out. Due to the poor geographic location......
to periodic wet/dry conditions [J]. Corrosion, 2000, 56(12): 1256-1265. [37] ALVAREZ M G, GALVELE J R. Pitting of high-purity zinc and pitting potential significance [J]. Corrosion, 1976, 32(7): 285-294. 纯锌在模... need to be clarified. The tropical marine atmosphere is recognized as an aggressive environment for metals because of the high temperature, high relative humidity (RH) and high chloride deposition rate......
研究[J]. 矿冶工程, 2013, 33(6): 94-96. HUANG Mei-song, CHENG Wei, YANG Lu-hui, JIA Shuai-guang. Technical research on preparation of high-purity ytterbium[J]. Mining and Metallurgical Engineering, 2013, 33(6): 94-96. [15] ZHANG Xiao-wei, WANG Zhi-qiang, CHEN De-hong, LI Zong-an, MIAO Rui-ying, YAN Shi-hong. Preparation of high purity rare earth metals of samarium, ytterbium and thulium[J]. Rare Metal......
, consecutive and automated production, etc [11–14]. Ion exchange has superiority in dealing with solutions of low concentration, by which preparation of single rare earth with high purity is more practical... tube. After the adsorption, loaded resin was washed with high-purity water or eluting reagent, and desorbed with hydrochloric acid. Desorption rate and impurities removal rate were calculated according......
speed 300 mm/min, powder feeder gas flux 2.5 L/min, and overlap between adjacent cladding (overlapping ratio) approximately 30%. In order to prevent the melted pool from heavy oxidation, high-purity... further delamination wear by crack-resistance under a load of 30 N. Severe abrasive wear and adhesive wear were prevented when the load increased to 60 N because of the high hardness and strength......
for manufacturing high purity strontium compounds. Nowadays, technique is used to preparing Sr(OH)2 from SrCO3. SrCO3 converts to SrO or soluble strontium compounds (e.g., SrCl2 or Sr(NO3)2) by pyrolysis or acid... of high-purity strontium compound. The newly prepared Sr(OH)2 in conversion product of celestite obtained though alkaline treatment could be extracted by hot water leaching and crystallization process......
N, HANSEN N. Strengthening mechanisms in nanostructured high-purity aluminum deformed to high strain and annealed[J]. Acta Materialia, 2009, 57(14): 4198-4208. [26] TAO N R, LU K. Nanoscale...] UTSUNOMIYA H, SAKAI T, MINAMIGUCHI S, KOH H. High-speed heavy rolling of magnesium alloy sheets[C]// LUO A A. Magnesium Technology. USA: San Antonio, 2006: 201-204. [6] SAKAI T, UTSUNOMIYA H......
with high-purity argon (99.992 vol.%). The box was equipped with an electronic analytical balance and an arc-welding machine. The masses of the magnesium and lithium pieces were measured with an accuracy... Temperature, 2014, 52: 536-540. [15] ABDULLAEV R N, KOZLOVSKII Yu M, KHAIRULIN R A, STANKUS S V. Density and thermal expansion of high purity nickel over the temperature range from 150K to 2030K [J......
investigated. 2 Experimental The experimental alloys were melted by using high-purity Mg, Zn, Y, Mg-30%Zr and Mg-30%Ca master alloys in an electric resistance furnace under the protection of anti-oxidizing... alloys have been extensively applied in the fields of bone implants, bone tissue engineering scaffolds and cardiovascular stents because of their excellent properties, such as high specific strength......
