Theoretical prediction and experimental determination of the low lattice thermal conductivity of Lu2SiO5

Zhao, Tian; Sun, Luchao; Wang, Jiemin; Wang, Jingyang

doi:10.1016/j.jeurceramsoc.2015.01.001

Cited by 43 publications

(37 citation statements)

References 34 publications

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“…Thermal is conducted via phonons in RETaO 4 ceramics, and phonons can be scattered by various scattering processes. When only one phase emerges in a polycrystalline material, the total phonon mean free path relies on the lattice structure feature (intrinsic features) and various point faults and grain boundaries (extrinsic features) . Therefore, the total phonon mean free path (Λ) is a summation of the different resistivities:…”

Section: Resultsmentioning

confidence: 99%

Thermal expansion performance and intrinsic lattice thermal conductivity of ferroelastic RETaO₄ ceramics

Chen

et al. 2019

J Am Ceram Soc

111

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Ferroelastic RETaO 4 ceramics are promising thermal barrier coatings (TBCs) because of their attractive thermomechanical properties. The influence of crystal structure distortion degree on thermomechanical properties of RETaO 4 is estimated in this work. The relationship between Young's modulus and TECs is determined. The highest TECs (10.7 × 10 −6 K −1 , 1200°C) of RETaO 4 are detected in ErTaO 4 ceramics and are ascribed to its small Young's modulus and low Debye temperature. The intrinsic lattice thermal conductivity (3.94-1.26 W m −1 K −1 , 100-900°C) of RETaO 4 deceases with increasing of temperature due to an elimination in thermal radiation effects. The theoretical minimum thermal conductivity (1.00 W m −1 K −1 ) of RETaO 4 indicates that the experimental value is able to be reduced further. We have delved deeply into the thermomechanical properties of ferroelastic RETaO 4 ceramics and have emphasized their high-temperature applications as TBCs. K E Y W O R D Sband gap, intrinsic lattice thermal conductivity, rare earth tantalates, thermal barrier coatings, thermal expansion performance, Young's modulus

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Section: Resultsmentioning

confidence: 99%

Thermal expansion performance and intrinsic lattice thermal conductivity of ferroelastic RETaO₄ ceramics

Chen

et al. 2019

J Am Ceram Soc

111

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“…The experimental values range from 1.87 W m −1 K −1 to 3.48 W m −1 K −1 at room temperature, which is roughly twofold difference among the different RE elements. At 1273 K, differences among experimental thermal conductivities decrease, and values range from 1.1 W m −1 K −1 to 1.6 W m −1 K −1 , except for Lu 2 SiO 5 , which is evidently affected by thermal radiation [37]. Table 8 Theoretical parameters for calculating intrinsic lattice thermal conductivities of X2-RE2SiO5 using Slack's model.…”

Section: Temperature-dependent Thermal Conductivitymentioning

confidence: 99%

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

Zhao

Zheng

Wang

et al. 2016

Journal of the European Ceramic Society

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200

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“…Based on Slack model, it is convenient to calculate thermal conductivity from several material parameters that can be deduced by DFT calculation. Recently, Feng, Luo, and Tian successfully combined density functional theory with Slack model to predict the temperature‐dependent lattice thermal conductivities of complex rare‐earth monazite‐type phosphates and silicates.…”

Section: Computational Methods and Experimental Proceduresmentioning

confidence: 99%

Accurate Exploration of the Intrinsic Lattice Thermal Conductivity of Si₂N₂O by Combined Theoretical and Experimental Investigations

et al. 2015

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Si 2 N 2 O is a promising ceramic with various structural and functional applications. Precisely exploring its thermal conductivity is crucially important to evaluate its thermal transport reliability as high-temperature structural component and electronic device. In this paper, temperature-dependent lattice thermal conductivity of Si 2 N 2 O is studied based on a method integrating density functional theory calculations and experimental measurements. The relationship between the complex crystal structure (or heterogeneous chemical bonding) and lattice thermal conductivity of Si 2 N 2 O is studied. We herein show that Si 2 N 2 O intrinsically has moderately high lattice thermal conductivity [30.9 WÁ(mÁK) -1 at 373 K], but extrinsic phonon scattering mechanisms, such as phonon scattering by point defects and grain boundaries etc., might significantly degrade the magnitude in experimental measurement [15.0 WÁ(mÁK) -1 at 373 K]. This work suggests the significance that understanding the intrinsic thermal conductivity, namely the upper limit value, is a precursor to deciphering the more complicated heat transport behavior of Si 2 N 2 O.

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Theoretical prediction and experimental determination of the low lattice thermal conductivity of Lu2SiO5

Cited by 43 publications

References 34 publications

Thermal expansion performance and intrinsic lattice thermal conductivity of ferroelastic RETaO₄ ceramics

Thermal expansion performance and intrinsic lattice thermal conductivity of ferroelastic RETaO₄ ceramics

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

Accurate Exploration of the Intrinsic Lattice Thermal Conductivity of Si₂N₂O by Combined Theoretical and Experimental Investigations

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Theoretical prediction and experimental determination of the low lattice thermal conductivity of Lu2SiO5

Cited by 43 publications

References 34 publications

Thermal expansion performance and intrinsic lattice thermal conductivity of ferroelastic RETaO4 ceramics

Thermal expansion performance and intrinsic lattice thermal conductivity of ferroelastic RETaO4 ceramics

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

Accurate Exploration of the Intrinsic Lattice Thermal Conductivity of Si2N2O by Combined Theoretical and Experimental Investigations

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Resources

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Thermal expansion performance and intrinsic lattice thermal conductivity of ferroelastic RETaO₄ ceramics

Thermal expansion performance and intrinsic lattice thermal conductivity of ferroelastic RETaO₄ ceramics

Accurate Exploration of the Intrinsic Lattice Thermal Conductivity of Si₂N₂O by Combined Theoretical and Experimental Investigations