| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Preceramic Polymers; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
Study on Manufacturing of Silsesquiazane Derived Hierarchically Porous Silicon Carbonitride Ceramics with Aligned Macropore by Freeze-casting Method |
| Author(s) |
Tae-Hwan Huh, Young-Je Kwark |
| On-Site Speaker (Planned) |
Tae-Hwan Huh |
| Abstract Scope |
Hierarchically porous ceramics have superior properties in comparison with conventional porous ceramic. Micro-/mesopores, which have size of smaller than 50 nm, give the large surface area and selectivity to the component, while macropores of larger than 50 nm give large pore volume and improve heat/mass transfer properties. Especially, ceramics with aligned macropore can be used in many applications such as filter, adsorbent, and catalyst because the pores give high flux of liquid or gaseous media. Freeze-casting is one of the best methods to fabricate the aligned macropores. In this study, we manufactured hierarchically silicon carbonitride (SiCN) ceramics with aligned macorpores using silsesquiazane (SSQZ) as a SiCN precursor. SSQZ could be obtained in solid form due to its branched structure, and resulted in improving structural stability without additional crosslinking process. In addition, we used organic polymers as a binder to further improve the stability. |