Company Filing History:
Years Active: 1995-1997
Title: Katuhiko Honma: Innovator in Silicon Nitride Production
Introduction
Katuhiko Honma is a distinguished inventor based in Akashi, Japan. He has made significant contributions to the field of materials science, particularly in the production of high-density sintered silicon nitride. With a total of three patents to his name, Honma's work has advanced the understanding and application of this important ceramic material.
Latest Patents
Honma's latest patents focus on a method for producing high-density sintered silicon nitride (Si₃N₄) with a relative density of at least 98%. The process begins with compacting silicon nitride powder into a desired shape. This is followed by a presintering step, typically conducted under normal pressure, to achieve a presintered body with a relative density of at least 92%. The presintered body is then subjected to hot isostatic pressing (HIP) in an inert gas atmosphere at temperatures ranging from 1500°C to 2100°C, with a nitrogen gas partial pressure of at least 500 atm. This innovative approach allows for the production of high-density sintered Si₃N₄ with complex configurations without the need for capsules. The use of a Y₂O₃–Al₂O₃–MgO system as a sintering aid has proven particularly effective. Additionally, Honma emphasizes the importance of a heat treatment step after HIP to enhance the strength of the sintered Si₃N₄, maintaining temperatures above 500°C for optimal results.
Career Highlights
Katuhiko Honma is associated with Kabushiki Kaisha Kobe Seiko Sho, a company known for its advancements in materials technology. His work has not only contributed to the field of ceramics but has also paved the way for new applications in various industries.
Collaborations
Honma has collaborated with notable colleagues, including Tsuneo Tatsuno and Hiroshi Okada, to further enhance the research and development of silicon nitride materials.
Conclusion
Katuhiko Honma's innovative methods for producing high-density sintered silicon nitride have made a significant impact in materials science. His contributions continue to influence the industry and inspire future advancements in ceramic technology.
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