{"title":"ba -改性Bi-Na-Sr钛酸盐：用于冷却应用的结构、介电和电热性能的探索","authors":"Ranjeet Sukachari Ughade, Anshu Gaur, Preeti, Jyotiranjan Rout, Kanhaiya Lal Yadav, Mahamad Ahamad Mohiddon","doi":"10.1002/ente.202402094","DOIUrl":null,"url":null,"abstract":"<p>\nThe present work reports the structural, dielectric, and electrocaloric properties of Ba-doped (Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.8</sub>Sr<sub>0.2</sub>TiO<sub>3</sub> (BNST) synthesized by the solid-state reaction route. Rietveld refined X-ray diffraction data is used to analyze the influence of Ba doping on the lattice parameters, crystallite size, and lattice strain of BNST. The dielectric characteristics of the Ba-doped BNST samples are analyzed in terms of complex permittivity, AC conductivity, and complex impedance. The dynamic properties of dipoles and the conduction charges are investigated from the frequency-dependent (100 Hz–1 MHz) dielectric response. Electrocaloric properties are assessed by the indirect method using the Maxwell equation. Polarization of pure and Ba-substituted BNST varies in a complex manner as a function of temperature leading to positive and negative electrocaloric effects in different temperature ranges within room temperature-160 °C, beneficial for exploiting the increasing and decreasing, both, cycles of the applied electric field for producing cooling effect. The dipolar entropy is consistent with the literature.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 9","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ba-Modified Bi–Na–Sr Titanate: Exploring Structural, Dielectric, and Electrocaloric Properties for Cooling Applications\",\"authors\":\"Ranjeet Sukachari Ughade, Anshu Gaur, Preeti, Jyotiranjan Rout, Kanhaiya Lal Yadav, Mahamad Ahamad Mohiddon\",\"doi\":\"10.1002/ente.202402094\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>\\nThe present work reports the structural, dielectric, and electrocaloric properties of Ba-doped (Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.8</sub>Sr<sub>0.2</sub>TiO<sub>3</sub> (BNST) synthesized by the solid-state reaction route. Rietveld refined X-ray diffraction data is used to analyze the influence of Ba doping on the lattice parameters, crystallite size, and lattice strain of BNST. The dielectric characteristics of the Ba-doped BNST samples are analyzed in terms of complex permittivity, AC conductivity, and complex impedance. The dynamic properties of dipoles and the conduction charges are investigated from the frequency-dependent (100 Hz–1 MHz) dielectric response. Electrocaloric properties are assessed by the indirect method using the Maxwell equation. Polarization of pure and Ba-substituted BNST varies in a complex manner as a function of temperature leading to positive and negative electrocaloric effects in different temperature ranges within room temperature-160 °C, beneficial for exploiting the increasing and decreasing, both, cycles of the applied electric field for producing cooling effect. The dipolar entropy is consistent with the literature.</p>\",\"PeriodicalId\":11573,\"journal\":{\"name\":\"Energy technology\",\"volume\":\"13 9\",\"pages\":\"\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2025-03-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Energy technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/ente.202402094\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy technology","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ente.202402094","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Ba-Modified Bi–Na–Sr Titanate: Exploring Structural, Dielectric, and Electrocaloric Properties for Cooling Applications
The present work reports the structural, dielectric, and electrocaloric properties of Ba-doped (Bi0.5Na0.5)0.8Sr0.2TiO3 (BNST) synthesized by the solid-state reaction route. Rietveld refined X-ray diffraction data is used to analyze the influence of Ba doping on the lattice parameters, crystallite size, and lattice strain of BNST. The dielectric characteristics of the Ba-doped BNST samples are analyzed in terms of complex permittivity, AC conductivity, and complex impedance. The dynamic properties of dipoles and the conduction charges are investigated from the frequency-dependent (100 Hz–1 MHz) dielectric response. Electrocaloric properties are assessed by the indirect method using the Maxwell equation. Polarization of pure and Ba-substituted BNST varies in a complex manner as a function of temperature leading to positive and negative electrocaloric effects in different temperature ranges within room temperature-160 °C, beneficial for exploiting the increasing and decreasing, both, cycles of the applied electric field for producing cooling effect. The dipolar entropy is consistent with the literature.
期刊介绍：
Energy Technology provides a forum for researchers and engineers from all relevant disciplines concerned with the generation, conversion, storage, and distribution of energy.
This new journal shall publish articles covering all technical aspects of energy process engineering from different perspectives, e.g.,
new concepts of energy generation and conversion;
design, operation, control, and optimization of processes for energy generation (e.g., carbon capture) and conversion of energy carriers;
improvement of existing processes;
combination of single components to systems for energy generation;
design of systems for energy storage;
production processes of fuels, e.g., hydrogen, electricity, petroleum, biobased fuels;
concepts and design of devices for energy distribution.
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