Synthesis of bismuth ferrite lead titanate nano-powders and ceramics using chemical co-precipitation
2008; Elsevier BV; Volume: 28; Issue: 11 Linguagem: Inglês
10.1016/j.jeurceramsoc.2008.02.013
ISSN1873-619X
AutoresTim P. Comyn, David F. Kanguwe, Jingyan He, Andy Brown,
Tópico(s)Microwave Dielectric Ceramics Synthesis
ResumoThe high temperature ferroelectric material BiFeO3–PbTiO3 was fabricated via chemical co-precipitation using Bi(NO3)3·(H2O)5, Fe(NO3)3·(H2O)9, Pb(NO3)2 and TiI4 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.
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