Preparation of pyrochlore-free lead magnesium niobate via adding excess constituent compounds
Resource
Materials Letters 27 (3): 71-75
Journal
Materials Letters
Journal Volume
27
Journal Issue
3
Pages
71-75
Date Issued
1996
Date
1996
Author(s)
Fu, Shih-Chi
Abstract
Pyrochlore-free Pb(Mg1/3Nb2/3)O3 was successfully synthesized in the mixed-oxide process without using columbite precursors. Adding excess amounts (5-20 mol%) of MgO and PbO in starting materials effectively resulted in the complete formation of Pb(Mg1/3Nb2/3)O3 after 1000°C calcination. The more the excess amount of MgO was added, the less the minimum excess amount of PbO was required for fabricating monophasic Pb(Mg1/3Nb2/3)O3. The morphology of calcined specimens markedly depended on the purity of Pb(Mg1/3Nb2/3)O3. The grain size of Pb(Mg1/3Nb2/3)O3 in the specimens containing the pyrochlore phase was 1.0-1.5 μm, whereas that of Pb(Mg1/3Nb2/3)O3 in the pure specimens increased considerably to 6.0-10.0 μm. The above phenomena suggested that the coarsening of Pb(Mg1/3Nb2/3)O3 was hindered by the presence of the pyrochlore phase.
SDGs
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
03.pdf
Size
370.82 KB
Format
Adobe PDF
Checksum
(MD5):ce5e145f6344b267b9b788629d95c709