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Bao-hui, WANG Pei-jun, LIU Yan-chang, CHEN Rui-bo, ZHAO Hong-zhang, WANG Xiao-ping, ZHENG Ai-guo (Titanium Product Plant, Ningxia Orient Tantalum Industry Co. Ltd, Shizuishan 753000, China) Abstract.... International Research Center of Tantalum and Niobium . Translation of tantalum and niobium [M]. LIU Gui-cai, LOU Yan-xiong, transl. Changsha: Central South University Press, 2009: 180-186. [2] ZORN G......
-polluting character (with hydrogen as the major by-product). In our earlier works, we prepared several tantalum and niobium alkoxides by electrochemical method [9-11]. In 1995, hafnium isopropanol... [13,17,18]. Titanium and tantalum, which are close to hafnium in its properties, were investigated in anhydrous alcohols, and the results indicated that they could suffer from severe corrosion [19-22......
through the additions of different percentages of Ag and to accompany with a microwave sintering technique. 2 Experimental procedure The ternary alloys of titanium, tantalum, and silver with particle... shows two principal areas: the bright and dark regions, based on energy-dispersive spectroscopy (EDS). The bright region is the region of tantalum, and the dark area is the region of titanium [44-46......
-deposited tantalum nitride films on integrity of Cu/TaN/SiO2/Si multilayer structure [J]. Materials Science and Engineering B, 2001, B84(3): 217-223. [4] STAVREV M, FISCHER D, WENZEL C, DRESCHER K.... Tantalum carbide and nitride diffusion barriers for Cu metallization [J]. Microelectronic Engineering, 2002, 60(1/2): 71-80. [7] ZHANG L W, LU J X, DUAN Q L, WANG H Y, LI R, XIN R M, WANG H J......
nitride without additives [J]. J Am Ceram Soc, 1989, 72(9): 1656-1660. [17] ANGERER P, NEUBAEUR E, YU L G, KHOR K A. Texture and structure evolution of tantalum powder samples during spark-plasma-sintering......
method. BEREZKIN et al [11] and CAI et al [12] prepared niobium alkoxide under the same principle. YANG et al [13] prepared high-purity tantalum ethoxide by electrochemical synthesis followed by vacuum...-zhou. Preparation of high-purity tantalum ethoxide by vacuum distillation [J]. Transactions of Nonferrous Metals Society of China, 2008, 18(1): 196-201． [14] HURLEN T, HORNKJOL S. Passive behavior......
]. Beijing: Metallurgical Industry Press, 2002. [3] 何季麟. 钽铌工业的进步与展望[J]. 稀有金属, 2003, 27(1): 23?27.HE Ji-lin. Progress and prospect of tantalum and niobium industry[J]. Rare Metals, 2003, 27(1): 23?27... by molten salt electrolysis: an overview[J]. Trans Indian Inst Met, 2005, 57: 579?592. [8] 胡小锋,许 茜. CaCl2-NaCl熔盐电脱氧法制备金属钽[J]. 金属学报,2006, 42(3): 285?289.HU Xiao-feng, XU Qian. Preparation of tantalum......
/mol和(, KNbCl6(g))=(-93.7±2.0) J/(mol·K). REFERENCES [1]Gaballah J, Allain E, Djona M. Extraction of tantalum and niobium from tin slags by chlorination and carbochlorination[J]. Metall Mater Trans B, 1997, 28B: 359-369. [2]Sadoway D R, Flengas S N. A new process for the separation of tantalum from niobium[J]. Metall Trans B, 1980, 8B: 57-62. [3]Sato N, Nanjo M. Separation of niobium from......
. [3]Kato H, Nakamura T, Nishiguchi S, et al. Bonding of alkali- and heat-treated tantalum implants to bone [J]. J Biomed Mater, 2000, 53(1): 28-35. [4]Kokubo T, Miyaji F, Kim H M. Spontaneous formation... simple chemical surface treatment [J]. J Biomed Mater, 1996, 32(3): 409-417. [6]Miyazaki T, Kim H M, Miyaji F, et al. Bonding strength of apatite layer formed on chemically treated tantalum metal......
and the time for solidification would be expected to be relatively small. As the matrix of γ and γ′ form in the dendrite, the carbon and tantalum are rejected to the liquid and enriched in the liquid... in all of the alloys. The volume fraction of carbides increases with increasing the withdrawing rate. 3) EPMA analysis shows that all types of carbide are rich in tantalum. It can be seen that blocky......
