Solvothermal synthesis of nanoscale BaTiO3 in benzyl alcohol-water mixtures and effects of manganese oxide coating to enhance the PTCR effect
Solvothermal synthesis of nanoscale BaTiO3 in benzyl alcohol-water mixtures and effects of manganese oxide coating to enhance the PTCR effect
A solvothermal method using various benzyl alcohol/water solvent mixtures has been used to synthesise phase pure nanocrystalline BaTiO3 samples with varying particle sizes in the range of 11-139 nm. The crystallite/particle size of BaTiO3 shows an overall decrease as the benzyl alcohol percentage increases, especially at higher percentages (≥ 80%) of benzyl alcohol. The decrease in crystallite/particle size can be attributed to the increased viscosity of the solvent mixture when raising the percentage of benzyl alcohol. A manganese oxide coating applied to the BaTiO3 surface had a negligible impact on its microstructure and morphology, but significantly enhanced the observed positive temperature coefficient of resistance. This research has been carried out to allow the development of smaller BaTiO3 particles for use in new battery, capacitor and thermistor technologies, whilst maintaining the PTCR property of the material that is typically observed in larger particle sizes.
Zhang, Min
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Caldwell, Thomas
5e1f0835-dbe5-4141-8b6c-37b1bfc60baa
Hector, Andrew L.
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Garcia-Araez, Nuria
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Falvey, Joseph
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6 December 2022
Zhang, Min
dfc78617-c6bf-40d9-a643-427ba8f2c24f
Caldwell, Thomas
5e1f0835-dbe5-4141-8b6c-37b1bfc60baa
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Falvey, Joseph
1a4206f6-48c0-4ece-961b-a5edbc2966a7
Zhang, Min, Caldwell, Thomas, Hector, Andrew L., Garcia-Araez, Nuria and Falvey, Joseph
(2022)
Solvothermal synthesis of nanoscale BaTiO3 in benzyl alcohol-water mixtures and effects of manganese oxide coating to enhance the PTCR effect.
Dalton Transactions.
(doi:10.1039/D2DT03307K).
Abstract
A solvothermal method using various benzyl alcohol/water solvent mixtures has been used to synthesise phase pure nanocrystalline BaTiO3 samples with varying particle sizes in the range of 11-139 nm. The crystallite/particle size of BaTiO3 shows an overall decrease as the benzyl alcohol percentage increases, especially at higher percentages (≥ 80%) of benzyl alcohol. The decrease in crystallite/particle size can be attributed to the increased viscosity of the solvent mixture when raising the percentage of benzyl alcohol. A manganese oxide coating applied to the BaTiO3 surface had a negligible impact on its microstructure and morphology, but significantly enhanced the observed positive temperature coefficient of resistance. This research has been carried out to allow the development of smaller BaTiO3 particles for use in new battery, capacitor and thermistor technologies, whilst maintaining the PTCR property of the material that is typically observed in larger particle sizes.
Text
d2dt03307k
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More information
Accepted/In Press date: 6 December 2022
Published date: 6 December 2022
Additional Information:
Funding Information:
The authors thank EPSRC for support under the Industrial Strategy Challenge Fund (EP/R021295/1) and for an early career fellowship to NGA (EP/N024303/1). The XPS data collection was performed at the EPSRC National Facility for XPS (“HarwellXPS”), operated by Cardiff University and University College London, under Contract No. PR16195. Raw data used in preparation of the figures in the article and supplementary information are available at https://doi.org/10.5258/SOTON/D2473 .
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Local EPrints ID: 473376
URI: http://eprints.soton.ac.uk/id/eprint/473376
ISSN: 0300-9246
PURE UUID: edf84902-fae5-4b70-bdf5-4ed4945e41be
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Date deposited: 17 Jan 2023 17:36
Last modified: 17 Mar 2024 03:54
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Author:
Min Zhang
Author:
Thomas Caldwell
Author:
Joseph Falvey
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