Calcium titanate dielectrics prepared by plasma spraying and thermal post-treatment

0439318 - ÚFP 2015 GB eng A - Abstract
Ctibor, Pavel - Kotlan, Jiří - Pala, Zdeněk - Homola, P. - Nehasil, V. - Hájková, Zuzana - Matys Grygar, Tomáš
Calcium titanate dielectrics prepared by plasma spraying and thermal post-treatment.
Abstracts of the First International Conference on Mechanics of Composites. Stony Brook: Stonz Brook University, 2014. s. 104. ISBN N.
[First International Conference on Mechanics of Composites. 09.06.2014-12.06.2014, Stony Brook]
Institutional support: RVO:61389021 ; RVO:61388980
Keywords : dielectrics * plasma spray * calcium titanate * impedance
Subject RIV: JK - Corrosion ; Surface Treatment of Materials; JK - Corrosion ; Surface Treatment of Materials (UACH-T)
http://me.eng.sunysb.edu/mechcomp2014.pdf

This paper studies self-supported CaTiO3 layers prepared by plasma-spraying technology. Water stabilized plasma gun (WSP) as well as conventional widely used gas stabilized plasma gun (GSP) were employed. Three sets of samples were prepared at different spraying conditions. Spray distance, i.e. the distance between the plasma nozzle and the substrate, was set before spraying to 350 mm and 450 mm for WSP device and 100 mm for GSP device. For both methods of plasma spraying CaTiO3 in the form of powder of industrial purity with size 63–125 μm was used. Self-supporting layers were obtained by removing the coating from metallic substrates.These self-supported specimens were annealed in air at atmospheric pressure for 2 hours in variety of temperatures from 530 – 1170 °C.Typical temperature step was set to 80°C with heating and cooling ramps set to 7 °C/ min.For characterisation of samples X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS) and Raman spectroscopy were used.
Permanent Link: http://hdl.handle.net/11104/0242622