关键词: 木材陶瓷, 层状结构, 密闭烧结, 特性表征

Abstract:

Laminated woodceramics was made form beech veneerformaldehyde phenol resin composite sintering at atmospheric pressure and airtight condition. Microstructure and phases composition were analyzed with scanning electron microscopy (SEM) and Xray diffraction (XRD). Results from SEM analysis showed that, woodceramics had clearly laminate structure and partly kept microstructure characteristics with native wood. XRD analysis indicated that, as increasing of sintering temperature, the graphitization degrees of laminated woodceramics had been improved and could make it more purer. Sintering temperature and PF resin content hand double effects on its mechanical properties and pore structure. Bending strength increased quickly before 800 ℃ and then decreased at 1 200 ℃, apparent density had same result as this. True density increased with the increasing sintering temperature and PF resin contents. Fracture toughness of laminated woodceramics is 0.8～1.2 MPa·m 1/2^, which is two times of the ordinary woodceramics. The laminated structure will enlarge the expansion path, improve the crack tolerance greatly and can avoid calamitously rupture.

Key words: woodceramics, laminate structure, airtight sintering, characterization