Metathetic room temperature preparation and characterization of scheelite-type ABO4 (A = Ca, Sr, Ba, Pb; B = Mo, W) powders

V. Thangadurai; C. Knittlmayer; W. Weppner

doi:10.1016/j.mseb.2003.09.025

Metathetic room temperature preparation and characterization of scheelite-type ABO₄ (A = Ca, Sr, Ba, Pb; B = Mo, W) powders

V. Thangadurai, C. Knittlmayer, W. Weppner^*

^*Corresponding author for this work

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Scheelite-type ABO₄ (A = Ca, Sr, Ba, Pb; B = Mo, W) powders of the shape of small spheres (except BaBO₄: needles) were prepared at room temperature by metathetic reactions using aqueous solutions of alkaline or lead chloride, and sodium molybdates or tungstates. The reaction is completed within a minute. The particle size as determined by SEM is of the order of several micrometers. Impedance measurements show activation energies of 0.40 and 0.62eV for SrWO₄ and PbWO₄, respectively. EMF measurements indicate ionic transport with an average transference number of 0.86-0.95 over the oxygen partial pressure range 10^-4 to 10 ^-19atm in the temperature range 600-850°C.

Original language	English
Pages (from-to)	228-233
Number of pages	6
Journal	Materials Science and Engineering: B
Volume	106
Issue number	3
DOIs	https://doi.org/10.1016/j.mseb.2003.09.025
Publication status	Published - 15 Feb 2004

Keywords

Ceramics
Chemical synthesis
Electrical measurements
Electrical properties
Impedance spectroscopy
Inorganic compounds

Access to Document

10.1016/j.mseb.2003.09.025

Cite this

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title = "Metathetic room temperature preparation and characterization of scheelite-type ABO4 (A = Ca, Sr, Ba, Pb; B = Mo, W) powders",

abstract = "Scheelite-type ABO4 (A = Ca, Sr, Ba, Pb; B = Mo, W) powders of the shape of small spheres (except BaBO4: needles) were prepared at room temperature by metathetic reactions using aqueous solutions of alkaline or lead chloride, and sodium molybdates or tungstates. The reaction is completed within a minute. The particle size as determined by SEM is of the order of several micrometers. Impedance measurements show activation energies of 0.40 and 0.62eV for SrWO4 and PbWO4, respectively. EMF measurements indicate ionic transport with an average transference number of 0.86-0.95 over the oxygen partial pressure range 10-4 to 10 -19atm in the temperature range 600-850°C.",

keywords = "Ceramics, Chemical synthesis, Electrical measurements, Electrical properties, Impedance spectroscopy, Inorganic compounds",

author = "V. Thangadurai and C. Knittlmayer and W. Weppner",

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doi = "10.1016/j.mseb.2003.09.025",

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TY - JOUR

T1 - Metathetic room temperature preparation and characterization of scheelite-type ABO4 (A = Ca, Sr, Ba, Pb; B = Mo, W) powders

AU - Thangadurai, V.

AU - Knittlmayer, C.

AU - Weppner, W.

PY - 2004/2/15

Y1 - 2004/2/15

N2 - Scheelite-type ABO4 (A = Ca, Sr, Ba, Pb; B = Mo, W) powders of the shape of small spheres (except BaBO4: needles) were prepared at room temperature by metathetic reactions using aqueous solutions of alkaline or lead chloride, and sodium molybdates or tungstates. The reaction is completed within a minute. The particle size as determined by SEM is of the order of several micrometers. Impedance measurements show activation energies of 0.40 and 0.62eV for SrWO4 and PbWO4, respectively. EMF measurements indicate ionic transport with an average transference number of 0.86-0.95 over the oxygen partial pressure range 10-4 to 10 -19atm in the temperature range 600-850°C.

AB - Scheelite-type ABO4 (A = Ca, Sr, Ba, Pb; B = Mo, W) powders of the shape of small spheres (except BaBO4: needles) were prepared at room temperature by metathetic reactions using aqueous solutions of alkaline or lead chloride, and sodium molybdates or tungstates. The reaction is completed within a minute. The particle size as determined by SEM is of the order of several micrometers. Impedance measurements show activation energies of 0.40 and 0.62eV for SrWO4 and PbWO4, respectively. EMF measurements indicate ionic transport with an average transference number of 0.86-0.95 over the oxygen partial pressure range 10-4 to 10 -19atm in the temperature range 600-850°C.

KW - Ceramics

KW - Chemical synthesis

KW - Electrical measurements

KW - Electrical properties

KW - Impedance spectroscopy

KW - Inorganic compounds

U2 - 10.1016/j.mseb.2003.09.025

DO - 10.1016/j.mseb.2003.09.025

M3 - Article

AN - SCOPUS:1142305242

SN - 0921-5107

VL - 106

SP - 228

EP - 233

JO - Materials Science and Engineering: B

JF - Materials Science and Engineering: B

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