Synthesis, Characterization and Thermal Diffusivity of Holmium and Praseodymium Zirconates

• Autorzy: Stopyra M. , Niemiec D. , Moskal G.

Identyfikatory

DOI

10.1515/amm-2016-0206

• Języki publikacji: EN

Abstrakty

EN

A₂B₂O₇ oxides with pyrochlore or defected fluorite structure are among the most promising candidates for insulation layer material in thermal barrier coatings. The present paper presents the procedure of synthesis of holmium zirconate Ho₂Zr₂O₇ and praseodymium zirconate Pr₂Zr₂O₇ via Polymerized-Complex Method (PCM). Thermal analysis of precursor revealed that after calcination at relatively low temperature (700°C) fine-crystalline, single-phase material is obtained. Thermal diffusivity was measured in temperature range 25-200°C, Ho₂Zr₂O₇ exhibits lower thermal diffusivity than Pr₂Zr₂O7. Additionally, PrHoZr₂O₇ was synthesized. The powder in as-calcined condition is single-phase, but during the sintering decomposition of solid solution took place and Ho-rich phase precipitated. This material exhibited the best insulating properties among the tested ones.

Słowa kluczowe

EN

pyrochlores; synthesis; polymerized-complex method; holmium zirconate; praseodymium zirconate; thermal diffusivity

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 2B
• Strony: 1249--1254
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wykr., wzory

Twórcy

autor

Stopyra M.

• Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, 8 Krasińskiego Str., 40-019 Katowice, Poland

autor

Niemiec D.

• Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, 8 Krasińskiego Str., 40-019 Katowice, Poland

autor

Moskal G.

• Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, 8 Krasińskiego Str., 40-019 Katowice, Poland

Bibliografia

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Uwagi

EN

This work was supported by Institute of Materials Science of Silesian University of Technology, as a part of Statutory Research no BK220/RM3/2015 (11/030/BK-15/0025)

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę