Heat capacity for the Eu2Zr2O7 and phase relations in the ZrO2–Eu2O3 system: Experimental studies and calculations

Fabrichnaya, Olga; Kriegel, Mario J.; Pavlyuchkov, D.; Seidel, Jürgen; Dzuban, Alexander V.; Savinykh, G.; Schreiber, Gerhard

doi:10.1016/j.tca.2013.02.009

Cited by 28 publications

(14 citation statements)

References 21 publications

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“…It was reported [17][18][19] that such calculations are in good agreement with measured values of heat capacity in RE zirconates. The relative change of density in 50-200°C range is negligible (~0,35%).…”

Section: Resultssupporting

confidence: 79%

Synthesis, Characterization and Thermal Diffusivity of Holmium and Praseodymium Zirconates

Stopyra¹,

Niemiec²,

Moskal³

2016

Archives of Metallurgy and Materials

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A 2 B 2 O 7 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 Ho 2 Zr 2 O 7 and praseodymium zirconate Pr 2 Zr 2 O 7 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, Ho 2 Zr 2 O 7 exhibits lower thermal diffusivity than Pr 2 Zr 2 O 7 . Additionally, PrHoZr 2 O 7 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.

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Section: Resultssupporting

confidence: 79%

Synthesis, Characterization and Thermal Diffusivity of Holmium and Praseodymium Zirconates

Stopyra¹,

Niemiec²,

Moskal³

2016

Archives of Metallurgy and Materials

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“…Similar structures of the pyrochlore zirconates (Ln 2 Zr 2 O 7 ) were reported [33][34][35][36][37][38].…”

Section: Materials Preparation and Microstructure Characterizationsupporting

confidence: 77%

Microstructure, electrical and humidity sensing properties of light rare earths zirconates

Petrila

Popa

Tudorache

2016

Sensors and Actuators A: Physical

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“…The 80 mol% Eu 2 O 3 composition contains B ‐Eu 2 O 3 and minor secondary phases of C ‐Eu 2 O 3 and m ‐ZrO 2 . Fabrichnaya et al . reported that prolonged heat treatment was required to reach equilibrium between defect fluorite, B and C phases for Eu 2 O 3 ‐rich part of the system.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, Fabrichnaya et al . reported the phase transition of P to DF in the Eu 2 Zr 2 O 7 system . What drives these structural changes?…”

Section: Introductionmentioning

confidence: 99%

In Situ Diffraction from Levitated Solids Under Extreme Conditions—Structure and Thermal Expansion in the Eu₂O₃–ZrO₂ System

et al. 2014

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The accurate determination of structure and thermal expansion of refractory materials at temperatures above 1500°C is challenging. Here, for the first time, we demonstrate the ability to reliably refine the structure and thermal expansion coefficient of oxides at temperatures to 2200°C using in situ synchrotron diffraction coupled with aerodynamic levitation. Solid solutions in the Eu 2 O 3 -ZrO 2 binary system were investigated, including the high-temperature order-disorder transformation in Eu 2 Zr 2 O 7 . The disordered fluorite phase is found to be stable above 1900°C, and a reversible phase transition to the pyrochlore phase is noticed during cooling. Site occupancies in Eu 2 Zr 2 O 7 show a gradual increase in disorder on both cation and anion sublattices with increasing temperature. The thermal expansion coefficients of all cubic solid solutions are relatively similar, falling in the range 8.6-12.0 3 10 -6 C -1 . These studies open new vistas for in situ exploration of complex structural changes in high-temperature materials.

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Heat capacity for the Eu2Zr2O7 and phase relations in the ZrO2–Eu2O3 system: Experimental studies and calculations

Cited by 28 publications

References 21 publications

Synthesis, Characterization and Thermal Diffusivity of Holmium and Praseodymium Zirconates

Synthesis, Characterization and Thermal Diffusivity of Holmium and Praseodymium Zirconates

Microstructure, electrical and humidity sensing properties of light rare earths zirconates

In Situ Diffraction from Levitated Solids Under Extreme Conditions—Structure and Thermal Expansion in the Eu₂O₃–ZrO₂ System

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Heat capacity for the Eu2Zr2O7 and phase relations in the ZrO2–Eu2O3 system: Experimental studies and calculations

Cited by 28 publications

References 21 publications

Synthesis, Characterization and Thermal Diffusivity of Holmium and Praseodymium Zirconates

Synthesis, Characterization and Thermal Diffusivity of Holmium and Praseodymium Zirconates

Microstructure, electrical and humidity sensing properties of light rare earths zirconates

In Situ Diffraction from Levitated Solids Under Extreme Conditions—Structure and Thermal Expansion in the Eu2O3–ZrO2 System

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In Situ Diffraction from Levitated Solids Under Extreme Conditions—Structure and Thermal Expansion in the Eu₂O₃–ZrO₂ System