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by the WC-5Co-2Cr3C2 cermet. Key words: spark plasma sintering; cermet; chromium carbide; tantalum carbide; mechanical properties 1 Introduction Several studies [1-3] have concentrated on the relationship between......
电容器用钽铌粉的研究进展 王峰1,王东辉1,郑欣1,李中奎1,夏明星1 (1.西北有色金属研究院新材料所,西安,710016) 摘要:概括介绍了电容器用钽铌粉的研究进展,介绍了钽粉的3种钠还原制备方法的化学反应机理并进行了比较,同时还介绍了铌粉的制备方法,包括铝热还原法,电解还原法,蒸气还原法,钠还原法和金属热还原法;阐述了钽铌粉中杂质的测定方法以及有关钽铌粉的其它研究进展. 关键词:钽粉; 铌粉; 钠还原法; 杂质; 电容器; tantalum powder; niobium powder; Na-reduced methods; impurity; condensers; [全文内容正在添加中] ......
电感耦合等离子体原子发射光谱法测定钽中微量铌的多元光谱拟合干扰校正方法研究徐娟1,郑诗礼2,郭奋1,王晓辉1,张懿2(1.北京市北京化工大学化学工程学院2.中国科学院 过程工程研究所,北京 100190)摘 要:钽样品经氢氟酸消解后,未经基体分离,直接以多元光谱拟合等离子体原子发射光谱法测定消解液中微量铌杂质元素.Nb 269.706 nm分析谱线仅受到Ta基体的部分重叠光谱干扰,扫描光谱图较为简单;Nb 292.781 nm,Nb 309.418 nm和313.079 nm分析谱线均受到OH带和Ta基体的光谱......
Electrochemical behaviors of tantalum in anhydrous ethanol containing hydrogen sulfate ions YANG Hai-ping1, YANG Sheng-hai1, CAI Ya-nan2, HOU Guo-feng1, XIA Jiao-yun1, TANG Mo-tang1 1. School... are presented when the potential is higher than 2.0 V. Key words: anhydrous ethanol; electrochemical impedance spectra; polarization curve; tantalum; tetrabutylammonium hydrogen sulfate 1 Introduction Tantalum......
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">To investigate the influence of tantalum content on high-temperature mechanical properties of low-carbon reduced activation ferritic/martensitic(RAFM) steels, RAFM steels containing different tantalum... of 180 and 220 MPa. It was found that 0.073% tantalum addition results in the increase in amount of stable carbonitrides(MX), and the creep rupture time of the steel under 180 MPa is obviously increased......
hardening rate and microstructure of tantalum ZHANG Xing-jian, JIANG Guo-sheng, WANG Zhi-fa (School of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: The work hardening rate of pure tantalum was studied by tension test, optical microscope and TEM. The results show that the work hardening rate of pure tantalum is low. TEM analysis indicates......
%和9.23%,可直接作为钽铌湿法冶炼工业原料.关键词:钨渣;钽;铌;富集;酸法Enrichment of tantalum and niobium from tungsten residue by hydrochloric acid methodYANG Xiu-li1, WANG Xiao-hui2, XIANG Shi-biao3, SUN Qing3, WEI Chang1, ZHENG...-manganese oxides, silicate and quartz. Tantalum and niobium are mainly encapsulated in silicon-manganese phases. Based on this analysis, a new method was proposed for tantalum and niobium enrichment......
, vanadium and tantalum on the microstructures in CLAM (China Low Activation Martensitic) steel after irradiation respectively, the microstructures of Fe-M (M= V ,W, Ta) model alloys were investigated... due to tantalum segregation near voids. It indicates that tantalum plays an important role in the improved irradiation resistance of CLAM steel.关键词:......
and H2O system were investigated. A L9(34) orthogonal design was used to study the effects of reaction temperature, mass ratio of KOH to Ta2O5, and reaction time on the dissolution rate of tantalum. It was found that the effect of reaction temperature on the dissolution rate of tantalum was much greater than that of the other factors. The results of factorial experiments showed that Ta2O5 was mainly......