Premium
Fabrication and Characterization of In Situ Porous S i 3 N 4 ‐ S i 2 N 2 O ‐ BN Ceramic
Author(s) -
Wang Shengjin,
Yang Zhihua,
Duan Xiaoming,
Jia Dechang,
Ma Feixiang,
Sun Boqian,
Zhou Yu
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12134
Subject(s) - sintering , microstructure , porosity , materials science , ceramic , fabrication , chemical engineering , mineralogy , composite material , chemistry , pathology , engineering , medicine , alternative medicine
Porous S i 3 N 4 ‐ S i 2 N 2 O ‐ BN ceramic was fabricated at 1750°C using S i 3 N 4 , BN , and ( NH 4 ) 2 HPO 4 as starting materials. During the sintering process, oxygen from the decomposed products of ( NH 4 ) 2 HPO 4 would bond Si and N in the liquid phase to form S i 2 N 2 O . The microstructure and properties of the porous ceramics were investigated. With the ( NH 4 ) 2 HPO 4 content varied from 10 to 50 vol.%, porosity of the porous S i 3 N 4 ‐ S i 2 N 2 O ‐ BN ceramic increased from 43.5% to 51%. The microstructure, mechanical, and dielectric properties was well controlled by adjusting ( NH 4 ) 2 HPO 4 contents. The present technique offers a more simple way of synthesizing porous S i 3 N 4 ‐ S i 2 N 2 O ‐ BN ceramics.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom