In a groundbreaking development poised to revolutionize the electronics and energy sectors, researchers have successfully demonstrated a novel approach to purify and densify iridium (Ir) targets. This innovative method, detailed in a recent study published in *Discover Nano* (translated from Chinese as “Exploring Nano”), combines hydrometallurgical and powder metallurgical processes, offering a significant leap forward in material science.
The research, led by Jigang Li from the School of Materials Science and Engineering at Nanchang University, explores a sophisticated purification and densification process for iridium. Traditionally, achieving high-purity and high-density iridium has been a challenge, but Li’s team has broken through these limitations by integrating multiple refining techniques. “This technological integration not only enhances the preparation efficiency but also ensures the stability of product quality,” Li explained.
The process begins with hydrometallurgy, which includes ion exchange resin, solvent extraction, and chemical precipitation to refine the iridium sponge. This step is crucial for removing impurities and achieving high purity. Following this, the team employed spray drying and pyrolysis to control the particle size and morphology of the iridium precursor. “The synthesized iridium particles are spherical, with an average size of about 5 micrometers,” Li noted. The final step involves hot press sintering, which densifies the iridium particles to achieve a density of 99.16%.
The significance of this research extends beyond the laboratory. High-purity and high-density iridium targets are essential for various applications in the electronics and energy sectors. They can be used as high-reliability contact and electrode materials, enhancing the performance and service life of electronic equipment. Moreover, the purification and densification technologies developed in this study can be applied to other materials with similar requirements, opening up new possibilities for advanced manufacturing.
The integration of atomization drying technology, applied for the first time in this research, further highlights the innovative nature of this work. This technology, combined with the other refining techniques, significantly improves the preparation efficiency and product quality. “This synergy of technologies creates a new path for the preparation of iridium powder and other high-purity materials,” Li added.
As the demand for high-performance materials continues to grow, this research offers a promising solution for the energy and electronics industries. By providing a reliable and efficient method for producing high-purity iridium targets, this study paves the way for future advancements in material science and technology. The findings not only address current challenges but also inspire further exploration and innovation in the field.