Dielectric and electrochemical properties through-thickness mapping on extremely thick plasma sprayed TiO2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F16%3A00459787" target="_blank" >RIV/61389021:_____/16:00459787 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21230/16:00240005

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ceramint.2016.01.108" target="_blank" >http://dx.doi.org/10.1016/j.ceramint.2016.01.108</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2016.01.108" target="_blank" >10.1016/j.ceramint.2016.01.108</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dielectric and electrochemical properties through-thickness mapping on extremely thick plasma sprayed TiO2

Popis výsledku v původním jazyce

An extremely thick TiO2 deposit was plasma sprayed using a water-stabilized spray system. Natural rutile TiO2 was used as feedstock powder. Reaching the required enormous thickness, 15 mm, was fast thanks to a high feed-rate WSP gun. The massive deposits were cut into slices aligned parallel with the substrate and studied. Their microstructure is lamellar with defects typical for plasma sprayed ceramics. Differences between the near-substrate slices, medium space slices and near-surface slices of the deposit were found namely in physical properties. Besides the microstructure, dielectric spectroscopy and electrochemical impedance spectroscopy were in the focus of investigation. The role of the grain interior and grain boundaries in the charge transport and the role of dipoles of various sizes are different near the substrate, in the middle and near the surface. The deposit was annealed to remove the oxygen sub-stoichiometry of the semiconductive as-sprayed titania. Various differences are present also in the annealed deposit since they are inherited from the as-sprayed state, which was not completely overlaid by annealing.

Název v anglickém jazyce

Dielectric and electrochemical properties through-thickness mapping on extremely thick plasma sprayed TiO2

Popis výsledku anglicky

An extremely thick TiO2 deposit was plasma sprayed using a water-stabilized spray system. Natural rutile TiO2 was used as feedstock powder. Reaching the required enormous thickness, 15 mm, was fast thanks to a high feed-rate WSP gun. The massive deposits were cut into slices aligned parallel with the substrate and studied. Their microstructure is lamellar with defects typical for plasma sprayed ceramics. Differences between the near-substrate slices, medium space slices and near-surface slices of the deposit were found namely in physical properties. Besides the microstructure, dielectric spectroscopy and electrochemical impedance spectroscopy were in the focus of investigation. The role of the grain interior and grain boundaries in the charge transport and the role of dipoles of various sizes are different near the substrate, in the middle and near the surface. The deposit was annealed to remove the oxygen sub-stoichiometry of the semiconductive as-sprayed titania. Various differences are present also in the annealed deposit since they are inherited from the as-sprayed state, which was not completely overlaid by annealing.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ceramics International

ISSN

0272-8842

e-ISSN

—

Svazek periodika

42

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

7183-7191

Kód UT WoS článku

000372676000077

EID výsledku v databázi Scopus

2-s2.0-84960131553