Development of New Production Process of Fine Tantalum Powder by Arc-Plasma CVD Method

电弧等离子体CVD法精细钽粉生产新工艺的开发

• 批准号: 11555190
• 负责人: SHIMAKAGE Kazuyoshi
• 金额: $ 8.38万
• 依托单位: Muroran Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555190/
• 关键词: Metallic Thermal Reduction; Tantalum Oxide; Mg Reduction; Tantalum Powder; Synthesis Process; Electrical Condennsor; Particle Distribution; Na Reduction; 金属熱還元法; 酸化タンタル; 粒度分布、; 比表面積、; コンデンサー; CVD法; 五塩化タンタル; 水素還元; 高容量コンデンサー; プロセス; 開発

Tantalum powder is produced by Na reduction process. However, tantalum powder is cohered each other and its physical property can not be improved by the current production process. From this reason, a new production process of tantalum powder have to be developed by using new raw materials.In the current investigation, fine tantalum powder has been synthesized by Mg reduction process, in which high purity Ta_2O_5 powder was used as raw materials. In an initial experiment, temperature and time dependences were examined for the production of tantalum powder by the following reduction reaction: Ta_2O_5 (s) + 5Mg(l,g) = 2Ta(s) + 5MgO(s). Mg reduction easily proceeded with an increase in temperature above 900℃. However, specific surface area of tantalum powder prepared was low because tantalum particles were cohered one another. Therefore, iMg reduction of tantalum oxide was carried out at the temperatures of 650℃ and 750℃, and physical properties of tantalum powder synthesized were evaluated by SEM observation, specific surface area measurement and paticle size measurement. As a result, specific surface area of tantalum powder prepared by Mg reduction was more larger than that prepared by Na reduction. Its physical property was improved.

采用钠还原法制备钽粉。但钽粉之间存在相互凝聚的现象，目前的生产工艺无法改善钽粉的物理性能。因此，必须利用新的原料开发新的钽粉生产工艺。本研究以高纯Ta_2O_5粉为原料，采用Mg还原法制备了精细钽粉。在初步实验中，考察了Ta_2O_5 (s) + 5Mg(l,g) = 2Ta(s) + 5MgO(s)还原反应生成钽粉的温度和时间依赖性。在900℃以上，Mg易于还原。但由于钽颗粒之间相互凝聚，制备的钽粉比表面积较低。因此，在650℃和750℃的温度下对氧化钽进行iMg还原，并通过SEM观察、比表面积测量和粒度测量来评价合成的钽粉的物理性能。结果表明，Mg还原法制备的钽粉比表面积大于Na还原法制备的钽粉。其物理性能得到改善。

项目成果

嶋影和宜: "マグネシウムによるNb2O5の金属熱還元挙動"資源素材学会秋期大会講演集. D5-2. 111-112 (2001)

Kazuyoshi Shimakage：“镁对 Nb2O5 的金属热还原行为”日本资源材料学会秋季会议论文集 D5-2 (2001)。

Kazuyoshi Shimakage, Shinji Hirai, Mitsuo Takada, Yukio Oda: "Synthesis of Tantalum Powder from Ta_2O_5 and TaCl_5 compounds"Proceedings of Hokkaido Meeting of Japan Institute of Metals. A27. 22-22 (2000)

Kazuyoshi Shimakage、Shinji Hirai、Mitsuo Takada、Yukio Oda：“由 Ta_2O_5 和 TaCl_5 化合物合成钽粉”日本金属学会北海道会议论文集。

嶋影和宜: "マグネシウムによるNb_2O_5の金属熱還元挙動"日本金属学会北海道支部夏期講演集. A02. 8 (2000)

Kazuyoshi Shimakage：“镁对Nb_2O_5的金属热还原行为”日本金属研究所北海道分会夏季讲座集A02。

Kazuyoshi Shimakage, Shinji Hirai, Takenori Takahashi: "Metallic Thermal Reduction behavior of Niobium Oxide by Magnesium Vapor"Proceedings of Autumn Meeting of the Mining and Materials Processing Institute of Japan. D5-2. 111-112 (2000)

Kazuyoshi Shimakage、Shinji Hirai、Takenori Takahashi：“镁蒸气对氧化铌的金属热还原行为”日本采矿和材料加工研究所秋季会议记录。

嶋影和宜: "マグネシウムによるNb_2O_5の金属熱還元挙動"資源素材学会秋期大会講演集. D5-2. 111-112 (2000)

Kazuyoshi Shimakage：“镁对 Nb_2O_5 的金属热还原行为”日本资源材料学会秋季会议论文集 D5-2（2000 年）。