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| Factors Affecting Density of Sintered Tantalum Billet |
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Received:March 18, 2023
Revised:April 06, 2023
Accepted:April 07, 2023
Published Online:June 16, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.07.012 |
| KeyWord:tantalum powder; tantalum blank; powder properties; vertical melting sintering; density |
| Author | Institution |
| XIE Yong-xu |
宁夏东方钽业股份有限公司 宁夏石嘴山市 98738 |
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| Abstract: |
| Using metal tantalum powder as raw material, capacitor grade tantalum wire was prepared by powder metallurgy processes such as cold isostatic pressing, vacuum vertical melting sintering, rolling and drawing. The characteristics of tantalum metal powder, such as microstructure, particle size distribution and chemical composition, as well as the characteristics of tantalum blank processing, forming and sintering process, directly affect the density of tantalum blank after sintering, and also directly affect the physical and chemical properties of capacitor grade tantalum wire. The results show that when the average particle size of tantalum powder is 5.5—6.5 μm, it is beneficial to the sintering of tantalum blank. High chemical impurity content of tantalum powder, low isostatic pressure, poor sintering furnace atmosphere and other factors are not conducive to the density of tantalum blank. |
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