Adapting of sol-gel process for preparation of TiB2 powder from low-cost precursors

Sol-gel process has been used to prepare low-cost TiB2 and TiC gels and powders. Citric acid is used to chelate titanium and boron precursors and ethylene glycol for reaction with this chelate to form organic esters. Thermal behaviour of homogeneous gel and the relationship between processing parame...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the European Ceramic Society 2008, Vol.28 (5), p.907-911
Main Authors: BACA, L, STELZER, N
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Sol-gel process has been used to prepare low-cost TiB2 and TiC gels and powders. Citric acid is used to chelate titanium and boron precursors and ethylene glycol for reaction with this chelate to form organic esters. Thermal behaviour of homogeneous gel and the relationship between processing parameters and microstructure of powders were determined. XRD and Raman spectroscopy were used to detect changes during crystallisation. Carbothermal reduction of the gel revealed the formation of TiB2 and TiC at 1200 C for 2 h. Well-shaped ball-like TiC crystals with a particle size about 200 nm and hexagonal plate-like TiB2 grains with a particle size about 2 micron and thickness 200 nm were formed at 1300 C for 1 h. 17 refs.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2007.09.028