Synthesis of bismuth ferrite lead titanate nano-powders and ceramics using chemical co-precipitation
✍ Scribed by Tim P. Comyn; David F. Kanguwe; Jingyan He; Andrew P. Brown
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 874 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0955-2219
No coin nor oath required. For personal study only.
✦ Synopsis
The high temperature ferroelectric material BiFeO 3 -PbTiO 3 was fabricated via chemical co-precipitation using Bi(NO 3 ) 3 •(H 2 O) 5 , Fe(NO 3 ) 3 •(H 2 O) 9 , Pb(NO 3 ) 2 and TiI 4 as precursors. The prepared composition was close to the target composition, as determined by XRF and EDX. Calcination at 800 • C yielded a single phase powder, with a primary particle size in the range 20-75 nm, and were single crystallites, as determined using TEM. Pellets fabricated from the powder were sintered to a maximum density at 950 • C, some 65-75 • C lower than using a conventional mixed oxide route, and had a density of 95% of theoretical. The sintered pellets had a relative permittivity of 190 compared to 280 for conventionally prepared materials.