|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||2023 Technical Division Student Poster Contest
||SPG-25: Effects of the Reduction Temperature and Amount of Diluent on the Properties of High-purity Tantalum Powder Prepared via the Hunter Process
||Yongkwan Lee, Sunggue Heo, Jae-Jin Sim, MiHye Lee, Soong Ju Oh, JaeHong Shin, Kyoung-Tae Park
|On-Site Speaker (Planned)
The Hunter process is predominantly used to manufacture high-purity Ta powder. In this study, the process temperature at which a liquid pool of raw material and diluent can be formed and the corresponding amount of diluent were analyzed by performing thermodynamic simulations using FactSage software. Based on the results of the thermodynamic simulations, Ta powder was prepared at process temperatures of 700–800 °C and a specific amount of NaCl at each temperature. Thereafter, the prepared Ta powder was recovered and a post-treatment process was performed to ensure purity. The synthesized Ta powders were confirmed to exhibit purities greater than 99.95% and oxygen, nitrogen, and hydrogen concentrations of 447, 21, and 10 ppm, respectively. The characterization results indicated that the produced Ta powders were fabricated entirely in a single phase with high purity and recovery rates. Finally, process optimization was achieved for manufacturing high-purity (≥3N5) Ta powder with controllable impurities.
||High-Temperature Materials, Powder Materials, Recycling and Secondary Recovery