Thermophysical performances of (Gd1-xYbx)2AlTaO7 oxides for high-temperature heat-insulation coating applications

Duan, Qunpeng; Lü, Kui; Zhang, Hongsong; Weiwei, Sang; Zhao, Yongtao; Xianfeng, Yan; Tang, An

doi:10.1016/j.ceramint.2020.04.179

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…On the other hand, the average atomic mass of (1 – x )SBKT– x NN ceramics gradually decreases with increasing x . This usually causes increased Young’s modulus (inset in Figure d, decreasing oxygen vacancies and defects also results in increasing Young’s modulus) and Debye temperature, resulting in the improvement of thermal conductivity. , In addition, the thermal conductivity of all samples at 25 °C is higher than that at 100 °C, which may be due to the increased thermal radiation effect at high temperatures . High thermal conductivity contributes to rapid heat release, resulting in high BDS.…”

Section: Results and Discussionmentioning

confidence: 98%

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics

Zhao

Fang

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Sr 0.7 Bi 0.2 TiO 3 (SBT) is a promising pulse energy storage material due to minor hysteresis, but its low maximum polarization (P max ) is bad for energy storage. K + −Bi 3+ defect pairs were introduced into the A-site of SBT to obtain Sr 0.35 Bi 0.35 K 0.25 TiO 3 (SBKT) with larger P max . Through firstprinciples calculations, we determined that the introduction of defect pairs destroys the paraelectric order phase and increases local polarization, resulting in more and larger polar nanoregion (PNR) formation. On this basis, doping NaNbO 3 (NN) in A-and B-sites of SBKT increases the cationic disorder and ferroelectric destabilization, further destroying the long-range order structure and forming more PNRs with smaller sizes. This enhances relaxation and decreases remnant polarization, and the broadened dielectric peak enables 0.85SBKT−0.15NN to meet the X7R specification. Furthermore, the decreased grain size and oxygen vacancy, increased thermal conductivity, and weakened local electric field (simulated by COMSOL) increase the dielectric breakdown strength (BDS). As a result, 0.95SBKT−0.05NN exhibits a high energy storage density (W) of 2.45 J/cm 3 with a high efficiency of 93.1%, a high pulsed discharge energy density of 2.1 J/cm 3 , and a high power density of 54.1 MW/cm 3 at 220 kV/cm. The energy storage properties show excellent stability of temperature (−55 to 150 °C), frequency (10−500 Hz), and cycling (10 5 cycles). Notably, for the pulse charge−discharge properties, 0.95SBKT−0.05NN shows great fatigue resistance during 10 5 cycles under 25 and 150 °C, accompanied by excellent thermal stability. Moreover, the BDS and P max of 0.95SBKT−0.05NN sintered in O 2 further enhance. A higher W of 2.92 J/cm 3 with a high efficiency of 89% at 250 kV/cm is achieved. Therefore, 0.95SBKT−0.05NN shows great application potential for pulse energy storage. In this work, we provide a novel strategy and systematic in-depth study for improving the energy storage properties of SBT.

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Section: Results and Discussionmentioning

confidence: 98%

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics

Zhao

Fang

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Preparation and thermophysical properties of RE2CrTaO7 (Y, Sm, Dy, Yb) ceramics for thermal barrier coating applications

Tian

2022

Ceramics International

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A review on recent applications and future prospects of rare earth oxides in corrosion and thermal barrier coatings, catalysts, tribological, and environmental sectors

Hossain

Rubel²,

Akbar³

et al. 2022

Ceramics International

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Thermophysical performances of (Gd1-xYbx)2AlTaO7 oxides for high-temperature heat-insulation coating applications

Cited by 3 publications

References 28 publications

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics

Preparation and thermophysical properties of RE2CrTaO7 (Y, Sm, Dy, Yb) ceramics for thermal barrier coating applications

A review on recent applications and future prospects of rare earth oxides in corrosion and thermal barrier coatings, catalysts, tribological, and environmental sectors

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Thermophysical performances of (Gd1-xYbx)2AlTaO7 oxides for high-temperature heat-insulation coating applications

Cited by 3 publications

References 28 publications

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr0.7Bi0.2TiO3-Based Lead-Free Relaxor Ferroelectric Ceramics

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr0.7Bi0.2TiO3-Based Lead-Free Relaxor Ferroelectric Ceramics

Preparation and thermophysical properties of RE2CrTaO7 (Y, Sm, Dy, Yb) ceramics for thermal barrier coating applications

A review on recent applications and future prospects of rare earth oxides in corrosion and thermal barrier coatings, catalysts, tribological, and environmental sectors

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About

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics