Research Progress of the Humidity-Sensitive Properties of Ferroelectric Materials
The precise monitoring of humidity is related to the preservation of some deliquescent materials,the measurement accuracy of electronic instruments and other aspects.High-performance humidity sensors have a wide range of uses in modern industry,agriculture,and medicine.Humidity sensitive materials include dielectric materials,semiconductor materials,metal materials,etc.Ferroelectric materials are a special kind of dielectric material containing spontaneous electrodes,and their application in the field of humidity-sensitive sensors is receiving increasing attention.Theoretically,the electrodeposition of ferroelectric materials has a strong adsorption effect on the polar water molecules on the surface,and at the same time,the polar water molecules attached to the surface can in turn affect the ferroelectric polarization,dielectric and electrical impedance properties of ferroelectric materials.Therefore,ferroelectric materials have important application prospects in high-performance wet-sensitive sensor devices,and ferroelectric wet-sensitive materials have the advantages of high sensitivity,fast response,and good stability.This paper reviewed the development history and status of ferroelectric moisture-sensitive materials,and summarized the physical mechanism of humidity sensing by ferroelectric materials.The ferroelectric moisture-sensitive materials were classified into four major parts,namely,ferroelectric nano,ferroelectric ceramic,ferroelectric thin film,and ferroelectric single crystal,according to their categories and properties,and the research progress of their moisture-sensitive properties and various factors affecting the moisture-sensitive performance were reviewed,in order to provide some scientific references for the future research of moisture-sensitive of new ferroelectric materials.
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