Preparation of silicon nitride ceramic derived by UV cure polymer ceramic precursor: The effect of polyceramic structure on pyrolyzate properties

Chin J Mater Res

2009, Vol. 23

Issue (1): 39-42 DOI:

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Preparation of silicon nitride ceramic derived by UV cure polymer ceramic precursor: The effect of polyceramic structure on pyrolyzate properties

CHEN Lixin; WANG Yazhou; SONG Jiale

School of Science; Key Laboratory of Applied Physics and Chemistry of Ministry of Education; Northwestern Polytechnical University; Xi'an 710072

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CHEN Lixin WANG Yazhou SONG Jiale. Preparation of silicon nitride ceramic derived by UV cure polymer ceramic precursor: The effect of polyceramic structure on pyrolyzate properties. Chin J Mater Res, 2009, 23(1): 39-42.

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Abstract

The polymer ceramic precursors with varied structures were made from UV cure thiol/vinyl silizane copolymer. Silicon nitride ceramic was obtained by pyrolyzing at high temperature. The effects of functionality of thiol, size of thiol molecular, thiol to vinyl ratio and the amount of inert filler on crystallinity and grain size were investigated and characterized by XRD, FESEM and energy spectrometer. It is found that the increase of functionality of thiol declines the crystallinity of the ceramic, but makes the grain size increase, whereas, the high of thiol stoichiometric molecular weight has the reverse effect. The increase of thiol to vinyl ratio enhances the crystallinity of the ceramic. There is a peak of the grain size when the vinyl to thiol ratio is 1:0.5. The incorporation of inert filler(β-Si3N4) can obviously depress the shrinkage of the size of ceramic.

Key words: inorganic non-metallic materials system of thiol/vinyl UV cure precursor crystallinity

Received: 21 February 2008

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TB321

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Supported by National Natural Science Foundation of China No.20574056, Military Equipment Foundation of Defence No.9140A12070106HK0338 and Doctorate Innovation Foundation of Northwestern Polytechnical University No.CX200614.

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https://www.cjmr.org/EN/ OR https://www.cjmr.org/EN/Y2009/V23/I1/39

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