Advancements in Low-Shrinkage Porous Ceramics: Key Principles and Future Directions

What is it about?

This article provides a comprehensive review of low sintering shrinkage porous ceramics, highlighting their significance and applications in various fields such as thermal insulation and filtration. It systematically examines different preparation methods like partial sintering, particle-stabilized foaming, gel-casting, foam-gelcasting, and additive manufacturing (AM). The review delves into the principles that contribute to low sintering shrinkage, particularly focusing on volume effects and mass transfer processes. It discusses the properties and applications of typical materials, such as mullite and alumina, emphasizing their mechanical properties and thermal conductivity. The article also addresses the challenges of achieving complex shapes due to excessive shrinkage and cracking during the sintering process. Finally, it summarizes the current state of research and suggests future directions for the development of low sintering shrinkage porous ceramics.

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Photo by Danielle Barnes on Unsplash

Photo by Danielle Barnes on Unsplash

Why is it important?

This review systematically discusses the principles and progress in the development of low sintering shrinkage porous ceramics, which are crucial for various industrial applications such as thermal insulation, sound absorption, and filtration. The article emphasizes the challenges associated with excessive shrinkage during the sintering process, which impacts the structural integrity and complexity of ceramic shapes. Understanding and mitigating these challenges is essential for advancing the manufacturing and application of porous ceramics in diverse fields. Key Takeaways: 1. This review examines various preparation methods for low sintering shrinkage porous ceramics, including partial sintering, particle-stabilized foaming, gel-casting, foam-gelcasting, and additive manufacturing, highlighting their unique characteristics and potential applications. 2. The article summarizes three primary principles of achieving low sintering shrinkage in porous ceramics, focusing on the volume effect and mass transfer processes that influence the final properties of these materials. 3. This review article compiles recent developments in the properties and applications of typical low sintering shrinkage ceramics, such as mullite and alumina, emphasizing their mechanical properties and thermal conductivity for use in thermal insulation and ceramic cores.