Patent
Thermal treatment method for nanometer tantalum powder
Zou Minming,Shi Wenlu,Ye Xianghai,Chen Min,Zhu Lijun,Jia Wanming,Hongmei Zhao,Shi Honggang,Liu Xiaobin +8 more
Reads0
Chats0
TLDR
In this paper, a tap density meter is used for carrying out tapping treatment on the nanometer tantalum powder before nanometer conglomeration treatment, so the preparation of tantalum powders blank blocks is not needed.Abstract:
The invention relates to a heat treatment method for nanometer tantalum powder. A tap density meter is used for carrying out tapping treatment on the nanometer tantalum powder before nanometer conglomeration treatment, so the preparation of tantalum powder blank blocks is not needed. Compared with the prior art with the treatment capability of 0.9g nanometer tantalum powder every time, the method provided by the invention has the advantages that 100 to 200g of nanometer tantalum powder can be treated every time, the treatment efficiency is greatly improved, meanwhile, the oxygen content of the obtained conglomerated nanometer tantalum powder is lower than 0.1 percent, the requirement that a tantalum capacitor requires the oxygen content of the tantalum powder being lower than 0.3 percent can be completely met, and the engineering production can be favorably realized. Compared with tantalum powder blank blocks in the prior art, the tantalum powder subjected to the tapping treatment has the advantages that the density and the hardness of blank blocks obtained after the heat treatment are low, before the deoxygenation treatment, the crushing treatment is not needed, the generation of tantalum powder sharp corners is avoided, and the adverse influence on the subsequent tantalum capacitor manufacturing and the capacitance volume is eliminated.read more
Citations
More filters
Patent
Method and device for complete inactivation of tantalum powder
TL;DR: In this paper, a method for complete inactivation of tantalum powder obtained after heat treatment is described, which is characterized in that tantalum caking, subject to heat treatment and inactivation, in a vacuum heat treatment furnace and a sealed container, under controllable oxygen concentration, is removed from the crucible, and the caking is smashed and sieved.
Patent
High-purity tantalum powder and preparation method therefor
TL;DR: In this paper, a high-purity tantalum powder has been described and a preparation method for its preparation is presented. But the preparation method is not suitable for high purity tantalum powders.
Patent
Method for preparing target-level high-purity tantalum powder
TL;DR: In this paper, the authors proposed a method for high-purity tantalum powder, which is a block-shaped mixture of tantalum powders prepared through potassium fluotantalate sodium reduction and one or more of diluted slats including NaCl, KCl and KF.
Patent
Preparation of high-purity tantalum powder
Li Zhongxiang,Cheng Yuewei,Chen Xueqing,Wang Ting,Shi Dejun,Tong Zekun,Yan Yan,Tian Xiaoyu,Zhao Zhonghuan +8 more
Patent
Preparation method of solid buoyancy material
Dai Jinhui,Wu Pingwei +1 more
TL;DR: In this article, the authors provided a preparation method of a solid buoyancy material, which consisted of three steps: obtaining a raw material mixture for preparing the solid buoyance material; secondly, ramming and molding the mixture under the vacuum conditions to obtain a green body; and thirdly, carrying out solidification treatment on the green body to obtain the material.
References
More filters
Patent
Method to agglomerate metal particles and metal particles having improved properties
TL;DR: In this article, a method to agglomerate metal particles such as tantalum and niobium powders is described which includes combining a volatilizable or vaporizable liquid with the particles to form wet particles, compacting the wet particles; drying the compacted wet particles to forming a cake; and heat treating the cake to form the agglated particles.
Patent
Method for producing ta powder used in capacitor
Luntao Pan,Zhao Shengcun +1 more
TL;DR: The Ta powder prepared by the reduction of potassium tantalifluoride with sodium is thermally aggregated under vacuum and then mixed with reduced metallic Mg powder The mixture is heated under vacuum or in inertia gas and then goes though such steps as pickling with hydrochlorie acid for removing residua of reducing metal and its oxide, water washing baking, and vacuum degassing at a temp less than 1150 degC for removing oxygen and hydrogen from Ta powder.
Patent
Method for manufacturing tantalum powder, tantalum powder, and tantalum electrolytic capacitor
TL;DR: In this paper, the authors define prerequisites in the course of manufacture from reduced tantalum powder to sintered compact for obtaining tantalum powders of (80,000 to 250,000) μFV/g CV and to obtain tantalum compounds by which high CV of ≥(80, 000 to 250 000)μFV /g can be achieved.
Patent
Production process of pelletized tantalum powder
TL;DR: In this article, a mixture of fine tantalum powder and metal reducing agent is densified to form pellet blank, and this can raise the pelletizing effect and make it possible to pelletize at relatively low temperature and to produce pelletized tantalum powders with low oxygen content, good flowability and good forming property.
Patent
Thermal treatment method of tantalum powder
Lin Chen,Haihong Mao,Xuecheng Dong,Cheng Yuewei,Ren Ping,Luo Guoqing,Lin Fukun,Zhidao Wang,Zhang Xueqing,Liang Hongyuan,Zhiqing Wang,Qiuying Wang +11 more
TL;DR: In this article, a deoxidization thermal treatment of tantalum powder is described. But the deoxidation process is performed in a vacuum thermal treatment stage, where the porosity of the powder is reduced to less than 60 mm by a reducing agent.