Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Pavel Tofel"'
Autor:
Daniel Drdlik, Vojtech Marak, Robert Klement, Pavel Tofel, Katarina Drdlikova, Hynek Hadraba, Zdenek Chlup
Publikováno v:
Boletín de la Sociedad Española de Cerámica y Vidrio, Vol 63, Iss 5, Pp 368-376 (2024)
In progressive particle or layered composites based on a combination of BaTiO3 and Al2O3, serving as e.g. ceramic harvesters, new phases are formed during heat treatment. The dominant one is BaTiAl6O12. This study provides information about the micro
Externí odkaz:
https://doaj.org/article/86caf723d2ea42718684b52dcc807795
Publikováno v:
Journal of Asian Ceramic Societies, Vol 9, Iss 1, Pp 229-236 (2021)
The goal of the current report was to find the optimal poling conditions: poling field, poling time and poling temperature for lead-free (Ba0.85Ca0.15Zr0.1T0.9)O3 ceramic. It has been noticed that the low poling field (< 2 kV/mm) was insufficient for
Externí odkaz:
https://doaj.org/article/9d50c2694bf84faf9f2f22ab3a0eb1a2
Autor:
Vijay Bijalwan, Pavel Tofel
Publikováno v:
Journal of Asian Ceramic Societies, Vol 7, Iss 4, Pp 536-543 (2019)
(Ba0.85Ca0.15)(Zr0.1Ti0.9)O3-xCeO2, (BCZTCe) lead-free piezoelectric ceramics were processed conventionally using a two-step sintering technique. The results suggest that two-step sintering is an effective technique to acquire a high density (99%) ho
Externí odkaz:
https://doaj.org/article/95aef7dcf7774978a7ba817511c5d7f7
Autor:
Pavel Tofel, Klára Částková, David Říha, Dinara Sobola, Nikola Papež, Jaroslav Kaštyl, Ştefan Ţălu, Zdeněk Hadaš
Publikováno v:
Nanomaterials, Vol 12, Iss 3, p 349 (2022)
Utilizing the triboelectric effect of the fibrous structure, a very low cost and straightforward sensor or an energy harvester can be obtained. A device of this kind can be flexible and, moreover, it can exhibit a better output performance than a dev
Externí odkaz:
https://doaj.org/article/6e92aa2d2158452189652a222ce5b56f
Publikováno v:
Journal of Asian Ceramic Societies, Vol 6, Iss 4, Pp 384-393 (2018)
By the solid-state reaction route, (Ba0.85Ca0.15-x Cex) (Zr0.1Ti0.9) O3 (BCCeZT) lead-free piezoelectric ceramics were prepared. The powder was processed at 1250 ºC for 2 h, and compacted green bodies were then sintered at various sintering temperat
Externí odkaz:
https://doaj.org/article/cf536cd647c3450ca1b5d4254863d204
Autor:
Miroslav Mrlík, Josef Osička, Martin Cvek, Markéta Ilčíková, Peter Srnec, Danila Gorgol, Pavel Tofel
Publikováno v:
Nanomaterials, Vol 11, Iss 7, p 1637 (2021)
This paper is focused on the comparative study of the vibration sensing capabilities of poly(vinylidene fluoride) (PVDF) sheets. The main parameters such as molecular weight, initial sample thickness, stretching and poling were systematically applied
Externí odkaz:
https://doaj.org/article/ee363ff032124b5da4a799906e819677
Autor:
Saša Zelenika, Zdenek Hadas, Sebastian Bader, Thomas Becker, Petar Gljušćić, Jiri Hlinka, Ludek Janak, Ervin Kamenar, Filip Ksica, Theodora Kyratsi, Loucas Louca, Miroslav Mrlik, Adnan Osmanović, Vikram Pakrashi, Ondrej Rubes, Oldřich Ševeček, José P.B. Silva, Pavel Tofel, Bojan Trkulja, Runar Unnthorsson, Jasmin Velagić, Željko Vrcan
Publikováno v:
Sensors, Vol 20, Iss 22, p 6685 (2020)
With the aim of increasing the efficiency of maintenance and fuel usage in airplanes, structural health monitoring (SHM) of critical composite structures is increasingly expected and required. The optimized usage of this concept is subject of intensi
Externí odkaz:
https://doaj.org/article/2d753411ee5d45ebbc25af7c5ca44b39
Autor:
Klara Castkova, Jaroslav Kastyl, Dinara Sobola, Josef Petrus, Eva Stastna, David Riha, Pavel Tofel
Publikováno v:
Nanomaterials, Vol 10, Iss 6, p 1221 (2020)
Electrospinning as a versatile technique producing nanofibers was employed to study the influence of the processing parameters and chemical and physical parameters of solutions on poly(vinylidene fluoride) (PVDF) fibers’ morphology, crystallinity,
Externí odkaz:
https://doaj.org/article/1d24f0a6434a42adbc09c659ad6503c0
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 10, Iss 2, Pp 125-129 (2012)
Possible optical setups for measurement of the peak-to-peak value of an ultrasonic transducer are described in this work. The Michelson interferometer with the calibrated nanopositioner in reference path and laser Doppler vibrometer were used for the
Externí odkaz:
https://doaj.org/article/4b74e4ff56a049deba4aa4c53c02f201
Autor:
Karel Maca, Hua Tan, Pavla Roupcová, Vijay Bijalwan, Pavel Tofel, Jiří Erhart, Dinara Sobola, Vladimír Prajzler
Publikováno v:
Journal of the European Ceramic Society. 41:2514-2523
This work shows for the first time the possibility to sinter BCZT powder compacts by rapid heating rates within one hour of sintering, while achieving good piezoelectric properties. The sintering was performed by rapid (heating rates 100 and 200 °C/
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67b5f0217cf37b22d3ddab99b28ab80a
https://doi.org/10.1016/j.jeurceramsoc.2020.11.029
https://doi.org/10.1016/j.jeurceramsoc.2020.11.029