Investigations of phase composition and grain size distribution in Pr doped ZrO2
|Agnieszka Opalińska 1, Roman Pielaszek 1, Cristina Leonelli 2, Witold Łojkowski 1, Tomasz Wejrzanowski 3, Hubert Matysiak 3|
1. Polish Academy of Sciences, Institute of High Pressure Physics (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland
A high pressure microwave reactor, i.e., a reactor where microwave energy is used to heat the fluids inside the high pressure cell was used to study the hydrothermal synthesis of zirconia doped with praseodymium (Pr content 1 mol%) in temperature range was from 210 to 305oC. Nanopowders with average grain size in the range of 10 nm were obtained.
A mixture of nanoparticles with tetragonal and monoclinic phase structure was obtained. A new method to determine the grain size distribution, which is based on analysis of the fine structure of the X-ray diffraction line profiles, was applied. It was found that the content of the monoclinic phase decreased with increasing synthesis pressure up to 8 MPa due to dissolution or transformation of grains of smaller diameter than about 12 nm.Keywords: Hydrothermal synthesis; Microwave; High Pressure; Zirconia; Praseodymium; Grain Size Distribution
Presentation: Poster at COST action D32 Mid term evaluation meeting, by Witold Łojkowski
See On-line Journal of COST action D32 Mid term evaluation meeting
Submitted: 2006-03-21 23:35 Revised: 2009-06-07 00:44