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prepared by micro-arc oxidation on AZ91HP magnesium alloys in a base solution containing 10 g/L NaOH and 12 g/L phytic acid with addition of 0-8 g/L sodium tungstate. The effects of sodium tungstate... of sodium tungstate on the microstructure, compositions and mechanical tribological characteristics of the oxide coatings. The results show that with increasing concentration of Na2WO4 in the solution......
Expanded Industrial Experiments of Free-alkali Recovery from Sodium Tungstate Solution by the Membrane Electrolysis Process 檀柏梅1,古海云1,桑建新2,刘玉岭1 (1.河北工业大学,天津 300130;2.河北省电子厅,石家庄 050071) 摘要:The expanded industrial experiments were conducted with practical industrial liquor to separate free alkali from sodium tungstate solution by electrolysis with cation-exchange membrane. Experimental results......
Preparation of Sodium Thiomolybdate from Sodium Tungstate Solution Using Sulfide as Sulphidizing Reagent曹佐英,喻红竹摘 要:The preparation of sodium thiomolybdate from sodium tungstate solution using S as a sulphidizing reagent was studied. The experimental results indicate that sodium molybdate in sodium tungstate solution can be very effectively converted......
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, Changsha 410083, China) Abstract: The ultrafine pyrochlore-type tungsten trioxide powders were hydrothermally synthesized from sodium tungstate solution by adding pure WO3 powders to the reaction system... the hydrothermal precipitation process of sodium tungstate solution. Key words: sodium tungstate solution; hydrothermal process; pyrochlore-type tungsten trioxide; ultrafine powder 焦绿石型三氧化钨(WO3?0.5H2O)以扭曲的WO6八面......
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Effects of sodium tungstate on characteristics of microarc oxidation coatings formed on magnesium alloy in silicate-KOH electrolyte DING Jun(丁 军)1, 2, LIANG Jun(梁 军)1, 2, HU Li-tian(胡丽天)1, HAO... [14-17]. However, there is little research work with MAO process on magnesium alloy with addition of polyvalent metal anions in the base electrolyte. In this investigation, thus, the sodium tungstate......
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ARTICLE J. Cent. South Univ. (2019) 26: 304-311 DOI: https://doi.org/10.1007/s11771-019-4002-1 Equilibrium concentration of lithium ion in sodium aluminate solution HUANG Wen-qiang(黄文强), LIU Gui... variation of lithium ion in sodium aluminate solution with addition of synthetic lithium aluminate was investigated. Elevating temperature, increasing caustic soda concentration, reducing alumina......