Metallurgical grade tantalum powder is the raw material of tantalum electrolytic capacitor anode lead, metallurgical grade tantalum plate, etc. It is made into blanks through isostatic pressing, vertical melting sintering, and other processes to process various functional materials. Actual production shows that changes in some properties of metallurgical grade tantalum powder will greatly affect the properties of tantalum wire and other processing materials, and will also have a serious impact on the processing process, increase processing costs and increase processing difficulty. The performance parameters of metallurgical grade tantalum powder include particle size distribution, particle morphology, chemical impurities, loose specific gravity, porosity, etc. When one of these parameters changes, the performance of subsequent products will change greatly. In general, porosity affects the compacted density of the billet and the uniformity of product properties. Chemical impurities will affect the properties of sintered billets. According to the literature, when the impurity content is high, incorrect batching may lead to remelting of the sintered billet, resulting in swelling or brittle billet. In addition, excessive batching will cause the weight loss of the billet. The loose specific gravity will affect the forming of the blank. The larger the loose specific gravity, the finer the powder of tantalum powder and the poorer the fluidity. Under the same pressure, the compact of the same specification should be obtained, and the compact of the fine powder will be much smaller. And what changes will the changes in the particle size distribution and particle morphology of tantalum powder cause to the subsequent products?
|
|
The following are the detailed experimental conclusions: When the processed material is prepared by powder metallurgy, the microscopic morphology and particle distribution uniformity of metallurgical grade tantalum powder will affect the performance of tantalum wire.
(1) The more complex the particle morphology of metallurgical grade tantalum powder, the larger the surface area of the particle, and the higher the sintering quality of the compact will be. On the contrary, the simpler the particle, the smaller the surface area, and the worse the sintering quality of the compact will be.
(2) The more uniform the distribution of metallurgical grade tantalum powder particles, the smaller the proportion of coarse particles, and the higher the sintering quality of the compact. On the contrary, the more uneven the particle distribution, the more the proportion of coarse particles, and the lower the sintering quality of the compact.
(3) The microscopic morphology of metallurgical grade tantalum powder directly affects the performance of tantalum wire, especially the tensile strength, elongation, and hardness. The higher the sintering quality of the compact, the lower the tensile strength and hardness of the tantalum wire product, and the better the plasticity. On the contrary, the more uneven the particle distribution is, the more coarse particles occupy, the lower the sintering quality of the compact, the higher the tensile strength and hardness of the tantalum wire product, and the worse the plasticity. Therefore, to produce good quality tantalum wire, the selection of raw material metallurgical grade tantalum powder is very important.
Baoji Yusheng Metal Technology Co., Ltd. can produce high-purity medical tantalum wire, capacitor tantalum wire, and chemical vapor deposition tantalum wire for customers at home and abroad. The final product is shipped, and there are strict production standards. For special sizes, please make a note in time when you send an inquiry.
