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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.125  No.7 (July) (2017)  >  pp.588-590

Journal of the Ceramic Society of Japan
<<Previous article Vol.125  No.7 (July) (2017)   pp.588 - 590 Next article>>

Fabrication of silicon nitride from a slurry containing cellulose nanofibers

Naoki KONDO1), Ken’ichiro KITA1), Takaaki NAGAOKA1)
1) National Institute of Advanced Industrial Science and Technology (AIST)

The effect of adding cellulose nanofibers (CNFs) to a silicon nitride slurry was evaluated. The addition of small amounts of CNFs drastically increased the viscosity of the silicon nitride slurry. Pouring the slurry with CNFs into a non-water absorptive mold, followed by natural drying, yielded a silicon nitride green body. Sintered silicon nitride was successfully fabricated via de-binder treatment and sintering of the green body. The sintered silicon nitride had a density of 3.142 × 103 kg m−3, and a microstructure with rod-like grains and a glassy grain boundary phase. The flexural strength of the sintered body was 595 MPa. These properties were comparable to those of silicon nitride fabricated from a slurry without CNFs.


Keyword:
Cellulose nanofiber (CNF), Silicon nitride, Slurry, Viscosity, Sintering, Microstructure, Strength

Received: March 06, 2017
Accepted: April 20, 2017 , Published online: July 01, 2017

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