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Journal of Electroceramics
Erschienen in: Journal of Electroceramics 3-4/2019

13.04.2019

Study of La-doped barium titanate ceramics obtained by laser sintering technique

verfasst von: Marcelo S. Silva, D. V. Sampaio, N. R. S. Souza, C. Kucera, J. Ballato, R. S. Silva

Erschienen in: Journal of Electroceramics | Ausgabe 3-4/2019

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Abstract

This work studies the influence of laser sintering on the semiconducting properties of La-doped BaTiO3 (BTL) ceramics. The BTL powders were synthesized using a solid-state reaction method and sintered via a new laser sintering technique. In this technique, a CO2 laser is used as the main heating source and no atmosphere control was employed. The BTL laser-sintered ceramics exhibited high relative density and a crack-free homogeneous microstructures after sintering at a laser power density of 5.0 W/mm2 for 30 s. The samples exhibited a positive temperature coefficient of resistivity (PTCR) increase of two orders of magnitude, and a room-temperature resistivity of 105 Ω.cm, even when sintered in an open atmosphere. X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, and UV-Vis and impedance spectroscopy techniques were employed and results provided.
Vorheriger Artikel Effects of size on the phase stability and conductivity of double-doped δ-Bi2O3
Nächster Artikel Effect of annealing temperature on the interfacial interaction of LiNi0.5Mn1.5O4 thin film cathode with stainless-steel substrate

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Metadaten
Titel
Study of La-doped barium titanate ceramics obtained by laser sintering technique
verfasst von
Marcelo S. Silva
D. V. Sampaio
N. R. S. Souza
C. Kucera
J. Ballato
R. S. Silva
Publikationsdatum
13.04.2019
Verlag
Springer US
Erschienen in
Journal of Electroceramics / Ausgabe 3-4/2019
Print ISSN: 1385-3449
Elektronische ISSN: 1573-8663
DOI
https://doi.org/10.1007/s10832-019-00174-7

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