Effect of interface carbonization on dielectric properties of potassium nitrate nanocomposite based on porous glasses
作者机构：Peter the Great St.-Petersburg Polytechnical UniversityPolytechnicheskaya 29195251 St.-PetersburgRussia Ioffe InstitutePolytekhnicheskaya 26194021 St.-PetersburgRussia Laboratory for High Performance CeramicsDepartment of Metallurgical and Materials Engineering Indian Institute of Technology-Madras(IIT Madras)Chennai 600036India
出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)
年 卷 期：2022年第12卷第4期
页 面：42-48页
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：The reported study was funded by RFBR DST(India)and NRF(South Africa)according to the research project№19-52-80019 BRICS_t
主 题：Nanocomposites ferroelectrics potassium nitrate porous glasses dielectric properties
摘 要：Dielectric properties and structure of pure and carbon-modified nanocomposites on the base of porous glasses with an average pore diameter of 6 nm(PG6)with embedded KNO3 have been studied at the temperature diapason of 300-430 K and at fre-quencies of 0.1-3×10^(6) Hz on cooling.X-ray diffraction studies of these samples have shown,that in modified and unmodified composites there is a mixture of the low-temperature paraelectric phase(α-phase)and the ferroelectricγ-*** modified composites,a decrease in permittivity and conductivity is *** response has been analyzed in the framework of modern theoretical *** relaxation processes have been identified and their origin has been *** has been found that the main contribution to the dielectric response of nanocomposite material PG6+KNO3 is provided by charge polarization on interfaces,which can be governed by modifying the inner pore ***-conductivity of both composites has been estimated and the activation energies have been *** energy change observed in a vicinity of 360 K is attributed to the phase transformation and the appearance of KNO3α-phase.
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