NDLI: Phase Evolvement in the Calcination of Lead Magnesium Niobate and Lead Iron Niobate Powders

Content Provider	IEEE Xplore Digital Library
Author	Youhua Yu Young-Jei Oh Chude Feng
Copyright Year	2007
Description	Author affiliation: Jingdezhen Ceramic Inst., Jingdezhen (Youhua Yu)
Abstract	The phase evolvement in the process of calcination of the mixtures of $MgNb_{2}O_{6}/Pb_{3}O_{4}$ and $FeNbO_{4}/Pb_{3}O_{4}$ and $MgNb_{2}O_{6}-FeNbO_{4}/Pb_{3}O_{4}$ was investigated by using X-ray diffraction analysis. The mechanisms involved are found to be different for the pyrochlore phases during the calcination of lead magnesium niobate and lead iron niobate powders. In the calcination of PFN, it undergoes a sequence of the decomposition of the precursor $FeNbO_{4}$ at a lower temperature, formation of a pyrochlore phase and later the transformation from pyrochlore to perovskite phase. In the case of PMN, the formation of pyrochlore is more likely related to the residual $Nb_{2}O_{5}$ inherited from the precursor of $MgNb_{2}O_{6}.$ The possible reaction sequences are proposed in this letter.
Starting Page	626
Ending Page	629
File Size	1933888
Page Count	4
File Format	PDF
ISBN	9781424413331
ISSN	10994734
DOI	10.1109/ISAF.2007.4393350
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-27
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Niobium compounds Calcination Magnesium Iron Powders Temperature Ceramics Lead compounds Materials science and technology X-ray diffraction
Content Type	Text
Resource Type	Article

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