共搜索到190条信息，每页显示10条信息，共19页。用时：0小时0分0秒669毫秒
: Nickel molybdate (NiMoO4) nanoparticles (NPs) were synthesized by sol-gel method. Utilizing water as solvent provides crystalline nanostructures. These nanocrystals were structurally characterized by X... materials [1]. Recently, metal molybdate materials have been widely used in photoluminescence, microwave applications, optical fibers, scintillator materials, humidity sensors and photo-catalysis [2,3......
, and phase analysis. The results obtained show that oxidation of MoS2 begins at 450 °C, and MoO3 reacts with metal-oxide forming molybdate at 600 °C. Finally, MoO3 can be dissolved in ammonia... roasting devices The concentration of molybdenum was determined via the lead molybdate weight method, and sulfur was titrated with barium chloride. Rhenium was determined via inductively coupled plasma......
of about 50 nm. The electrode has a very large real surface area and a stable structure. The effects of sodium molybdate concentration on the composition, surface morphology, and structure of electrodes... by electrodeposition at different contents of sodium molybdate (with other conditions constant), and then the compositions of the alloy were measured by EDS. The results are presented in Table 1. The data in Table 1......
generates potassium molybdate (K2MoO4) without intermediate compounds. Temperature (6-80 °C), KOH concentration (0.0005-0.025 mol/L), and particle size (5-40 μm) positively affected the dissolution... molybdate recrystallized at 60 °C. The final product contained less than 1 mg/kg of several elements (i.e., Ca, Fe, Cu, and As) and 10 mg/kg of Sb. A subsequent study proposed leaching with sulfuric......
......
聚合硅酸解聚-硅钼蓝分光光度法测定矿石中二氧化硅张建珍1,王锦荣1,刘家齐1(1.山西省太原市冶金地质总局第三地质中心实验室)摘 要:针对矿石中的二氧化硅通常含量较高,制取母液时大量硅酸产生聚合的问题,建立了以氟化铵-氯化铝作为聚合硅酸(nH4SiO4)解聚剂,钼酸铵作为显色剂和抗坏血酸-盐酸羟胺作为还原剂测定高含量二氧化硅的的分光光度法.实验表明,室温25℃时,在HCl浓度为0.25~0.35 mol/L,氟化铵-氯化铝混合液体积为10 mL,反应时间为25 min时,聚合硅酸(nH4SiO4)可被完全解聚生......
without washing is composed of phosphate with Fe3+ and Zn2+ and a little of molybdate. The phosphating film, whose crystalline size is small than or equal to 2 μm, is series and thick with weightiness... of molybdate modified zinc phosphate coating on magnesium alloy AZ91D[J]. Chemical Journal of Chinese Universities, 2006, 27(5): 817-820. [2] 张圣麟, 陈华辉, 李红玲, 等. 常温磷化处理技术的研究现状及展望[J]. 材料保护, 2006, 39(7......
technique for ammonium molybdate production. Key words: molybdenite; limestone; ammonium carbonate; oxidizing roasting; leaching 1 Introduction China is rich in molybdenum resource and contributes more... schematic technological process for producing ammonium molybdate. 2 Thermodynamic calculation and thermo- gravimetric analysis 2.1 Thermodynamic calculation The possible reactions during molybdenite......
are composed mainly of decomposition of Ca(OH)2, oxidization of MoS2, re-oxidization of MoO2 and the formation of molybdate. The products are MoO2, MoO3, CaMoO4 and CaSO4 in the process of oxidation... Xing-yu, HE Li-hua, HU Jin-ling. Leaching thermodynamics of decomposing sparingly soluble molybdate by sodium hydroxide[J]. The Chinese Journal of Nonferrous Metals, 2014(11): 2921-2927. [23] 彭 俊, 王学文......
is composed of chromate, molybdate and oxide as the temperature rises, and the composites have superior anti-friction and wear resistance at high temperature. By comparing the three composites......
