Article
Materials Science, Ceramics
Nikola Novak, Florian Weyland, George A. Rossetti
Summary: The study found that the electrocaloric effect of Ba(ZrxTi1-x)O-3 (BZT) decreases significantly with increasing Zr concentration, but an enhanced electrocaloric responsivity occurs at the triple point composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Engineering, Electrical & Electronic
Lagen Kumar Pradhan, Suman Kumari, Murli Kumar Manglam, Rabichandra Pandey, Manoranjan Kar
Summary: This study investigates the evolution of microstructure and its effect on the electrical properties of ((Bi0.5Na0.5)(0.94)Ba-0.06)(0.70)Sr0.30TiO3 [BNBSTO] electroceramic. The relative dielectric constant and temperature-dependent relative permittivity both increase with the sintering temperature, while the electrical diffuseness decreases with the increase of grain size. Grain boundaries play a significant role in the electrical conductivity, and the grain size directly influences the ferroelectric properties and energy storage density.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
Ziman Wang, Ming Yang, Hang Zhang
Summary: This study demonstrates that strain engineering can significantly regulate the electrocaloric effect in ferroelectric materials, with isotropic compressive and tensile strains up to 5% effectively controlling the thermodynamic properties. Compression induces a positive electrocaloric effect, whereas tension causes a negative effect, as verified by the change in Born effective charge. Accelerated calculations (> 4x) using GPUs with CUDA provide a new strategy for regulating the vibrational entropy change in the electrocaloric effect.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Thermodynamics
Elian Bsaibess, Abdelhak Hadj Sahraoui, Christ Glorieux, Jan Leys, Jan Thoen, Stephane Longuemart
Summary: The electrocaloric heat production in BaTiO3-based multilayer ceramic capacitors with Y5V specification was measured directly using an adiabatic calorimeter setup. Applying an electric field of 30 MVm(-1) resulted in a heat release of 0.94 J g(-1) and an electrocaloric temperature change of 0.46 K, which is consistent with previous studies.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Xiaowei Wei, Chunlin Zhao, Ting Zheng, Xiang Lv, Ling Zhang, Bing Li, Jiagang Wu
Summary: This study systematically investigates the correlation between critical state and electrocaloric effect in different compositions of ferroelectrics. The results show that the critical state plays a crucial role in determining the performance of electrocaloric materials, and intentionally introducing moderate relaxation can enhance the electrocaloric effect.
Article
Materials Science, Ceramics
Boyang Zhang, Xiaojie Lou, Kun Zheng, Xuefan Xie, Peng Shi, Mengyao Guo, Xiaopei Zhu, Yangfei Gao, Qida Liu, Ruirui Kang
Summary: By tuning the material composition, a large electrocaloric response was achieved in BHT-70BST, while BHT-50BST showed a broad working temperature window due to its diffusion behavior and multiphase coexistence.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Ye Zhao, Qian Wang, Jun-Hu Lv, Xian Zhao, Chun-Ming Wang
Summary: In this study, Y-modified BaTiO3 ceramics with different yttrium doping levels were prepared, and BT-2.5Y showed the highest electrocaloric effect performance. This indicates that BT-100xY ceramics have great potential for applications.
CERAMICS INTERNATIONAL
(2021)
Article
Energy & Fuels
Junning Li, Alvar Torello, Youri Nouchokgwe, Torsten Granzow, Veronika Kovacova, Sakyo Hirose, Emmanuel Defay
Summary: Electrocaloric (EC) materials offer a promising alternative to traditional caloric heat pumps, as they can achieve significant temperature changes under the application of electric fields. Researchers have found EC effect in lead-free BaTiO3 multilayer capacitors, which exhibit strong first-order phase transition and improved electrical resistivity by adding a dopant. These findings suggest the potential for designing lead-free caloric cooling prototypes using optimized BaTiO3 capacitors.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Hua Qiang, Shiwen Fu, Zunping Xu
Summary: Optimizing the Sn doping content in BaSnxTi1-xO3 ceramics enhances the electrocaloric effect, leading to higher electrocaloric efficiency and a wider range of temperature changes. This improvement is mainly attributed to the multiphase coexistence within the material.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Keng Wang, Xiaoming Shi, Rongzhen Gao, Jing Wang, Jiwen Xu, Xingwang Cheng, Houbing Huang
Summary: The phase diagrams of BiFeO3-PbTiO3 solid solution were investigated and it was found that a relatively low electric field could induce a giant electrocaloric temperature change near the morphotropic phase boundary. The temperature change range of the electrocaloric effect was also found to be broader with the increase of BiFeO3 mole fraction.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Sagar E. Shirsath, M. Hussein N. Assadi, Ji Zhang, Nitish Kumar, Anil S. Gaikwad, Jack Yang, Helen E. Maynard-Casely, Yee Yan Tay, Jianhao Du, Haoyu Wang, Yin Yao, Zibin Chen, Jinxing Zhang, Shujun Zhang, Sean Li, Danyang Wang
Summary: Perovskite multiferroics have attracted significant attention in the development of multifunctional electronic devices. This study demonstrates the interface-driven multiferroicity in low-cost and eco-friendly bulk polycrystalline materials. The fabricated nanocomposites exhibit both room-temperature ferromagnetism and ferroelectricity, with a robust magnetoelectric coupling.
Article
Materials Science, Ceramics
Chunlin Zhao, Yanli Huang, Xiao Wu, Min Gao, Tengfei Lin, Cong Lin
Summary: In this study, the evolution behavior of the electrocaloric effect in BaTiO3-based ceramics was compared, and the (Ba0.85Ca0.15)(Ti1-xHfx)O-3 ceramics were selected as the paradigmatic system. The diffuseness exponent increases linearly with rising x. The electrocaloric temperature change shows an opposite variation, while the temperature span displays the same tendency with the diffuseness exponent changing. The polarization orientation and strength play a significant role in influencing the electrocaloric effect in different phase structures and transitions.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Eduardo Lupi, Robert B. Wexler, Derek Meyers, Anton Zahradnik, Yizhe Jiang, Sandhya Susarla, Ramamoorthy Ramesh, Lane W. Martin, Andrew M. Rappe
Summary: Complex-oxide superlattices with precise unit-cell structures provide a pathway to various emergent phenomena. In this study, relaxor-like behavior is observed in superlattices of ferroelectric and dielectric materials. The behavior is influenced by the periodicity and shape of the superlattice.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Ceramics
F. Brahma, Bhagyashree Mohanty, S. Bhattacharjee, R. L. Hota, R. K. Parida, B. N. Parida
Summary: The solid solution of (Sm0.75Bi0.25FeO3)(0.5) (BaTiO3)(0.5) perovskite system, prepared through conventional solid state reaction, exhibits multiferroic properties and high dielectric constant, making it suitable for various storage devices.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Xiang Niu, Xiaodong Jian, Weiping Gong, Wei Liang, Xuetian Gong, Guangzu Zhang, Shenglin Jiang, Kun Yu, Xiaobo Zhao, Yingbang Yao, Tao Tao, Bo Liang, Sheng-Guo Lu
Summary: In this study, a polarization merging strategy was proposed to achieve a large electrocaloric effect in ferroelectric ceramics. Phase-coexisted ceramics were prepared via a solid-state reaction approach, and their excellent electrocaloric properties were confirmed through experiments.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Optics
B. A. Matveev, G. Yu. Sotnikova
OPTICS AND SPECTROSCOPY
(2019)
Article
Physics, Condensed Matter
E. P. Smirnova, G. Yu Sotnikova, N. Zaitseva, G. A. Gavrilov, A. Sotnikov
PHYSICS OF THE SOLID STATE
(2019)
Article
Physics, Applied
G. Yu Sotnikova, G. A. Gavrilov, A. A. Kapralov, E. P. Smirnova
TECHNICAL PHYSICS LETTERS
(2019)
Article
Materials Science, Multidisciplinary
G. A. Gavrilov, G. Yu. Sotnikova, A. V. Sotnikov, E. P. Smirnova
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Instruments & Instrumentation
Galina Yu. Sotnikova, Gennadii A. Gavrilov, Alexander A. Kapralov, Kirill L. Muratikov, Elena P. Smirnova
REVIEW OF SCIENTIFIC INSTRUMENTS
(2020)
Article
Physics, Applied
E. P. Smirnova, G. Yu. Sotnikova, N. V. Zaitseva, S. V. Senkevich, A. V. Sotnikov, G. A. Gavrilov
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Physics, Condensed Matter
G. Yu. Sotnikova, G. A. Gavrilov, A. A. Kapralov, R. S. Passet, E. P. Smirnova, A. V. Sotnikov
PHYSICS OF THE SOLID STATE
(2020)
Article
Physics, Condensed Matter
G. Yu Sotnikova, G. A. Gavrilov, K. L. Muratikov, R. S. Passet, E. P. Smirnova
Summary: A new experimental method for measuring leakage currents in dielectrics is proposed, based on analyzing the dynamics of sample temperature variation under an electric field. The method demonstrates its capability on PFW-PT ceramics samples, showing experimental dependences of the conductivity in a wide temperature range from 20 to 110 degrees C.
PHYSICS OF THE SOLID STATE
(2021)
Article
Materials Science, Multidisciplinary
G. Yu Sotnikova, G. A. Gavrilov, A. A. Kapralov, K. L. Muratikov, R. S. Passet, E. P. Smirnova, A. Sotnikov
Summary: This article proposes a new experimental approach for studying the electrocaloric, pyroelectric, and thermal effects in ferroelectrics and related materials. The approach involves analyzing the sample temperature response to external actions, including long-term electrical impacts.
Article
Materials Science, Multidisciplinary
G. Yu Sotnikova, G. A. Gavrilov, A. A. Kapralov, K. L. Muratikov, R. S. Passet, E. P. Smirnova, A. Sotnikov
Summary: This article presents and substantiates a new approach to pyroelectric research based on the information-measuring theory of dynamical systems. The proposed technique allows for precise quantification of the pyroelectric coefficient of materials, both bulk and film, with high reliability and accuracy, by directly monitoring the sample temperature and pyroelectric current over a wide range of temperature and applied electric field.
Article
Physics, Applied
G. A. Gavrilov, K. L. Muratikov, E. A. Panyutin, G. Yu. Sotnikova, Sh. Sh. Sharofidinov
TECHNICAL PHYSICS LETTERS
(2020)
