Microstructure and properties of lightweight fibrous porous mullite ceramics prepared by vacuum squeeze moulding technique

摘要

A novel fibrous porous mullite network with a quasi-layered microstructure was produced by a simple vacuum squeeze moulding technique. The effects of organic binder content, inorganic binder and adsorbent on the microstructure and the room-temperature thermal and mechanical properties of fibrous porous mullite ceramics were systematically investigated. An anisotropy microstructure without agglomeration and layering was achieved. The fibrous porous mullite ceramics reported in this study exhibited low density (0.40 g/cm(3)), low thermal conductivity (similar to 0.095 W/(m K)), and high compressive strength (similar to 2.1 MPa in the x/y direction). This study reports an optimal processing method for the production of fibrous porous ceramics, which have the potential for use as high-temperature thermal insulation material. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.