Low - Temperature Sintering of Porous Ceramics via Sodium Borate Addition
Year: 2019
Type: article
Abstract: In the current study, sodium borate-bonded highly open porous ceramics successfully produced by starch consolidation technique. Open porous ceramic production was carried out by using an economical grade a-Si3N4, corn starch, CC31 commercial-grade kaolin, and borax decahydrate (Na2B4O7.10H2O). Borax decahydrate was used as a sintering aid in the system and total ceramic (a-Si3N4 + CC31): borax decahydrate ratio was kept constant at 5:1. Sintering studies of the shaped samples carried out in an air atmosphere at a relatively low sintering temperature, 1100°C, for one hour. Scanning electron microscopy investigations of the porous ceramic samples revealed that due to the high amount of borax based sintering additive a significant amount of liquid phase formed during the sintering process of the designed ceramics. Highly open porous(~66-74%) and lightweight(~0.64-0.83 g/cm3) ceramics were produced via starch consolidation technique and low-temperature sintering at atmospheric conditions.
Source: Material Science Research India
DOI: 10.13005/msri/160107
Author: AYSE KALEMTAS
Institution: Bursa Technical University
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2911368299