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Studies on the piezoelectric,pyroelectric,dielectric properties and streaming potential of human dentin

Abstract

人牙是一种天然的介电材料,从理论上推测其应具有介电材料的一般性质,但是目前相关的报道很少。本研究以新鲜人类牙本质为模型,进行了以下实验:1.设计了压电效应的连续测量系统,并且首次测量了人类牙本质的压电系数d33,研究了牙小管方向、水分含量、胶原和矿物含量对其压电效应的影响。2.首次测量了人类牙本质的热释电系数随温度的变化,研究了水分含量、胶原和矿物含量对其热释电效应的影响。3.测量了人类牙本质在5个不同温度下的介电频谱,研究了牙本质的介电系数与水分含量、测量温度、频率的关系及胶原和矿物含量的影响。4.设计了流动电位的测量装置,首次测量了人类牙本质的流动电位。从本实验的结果可知,人类牙本质具有压...Human dentin is a nature dielectric material; it is assumed that it has similar dielectric properties to ordinary dielectric materials; in this study, investigations on the dielectric properties of human dentin were carried out as follows: 1. A testing system was setup to measure the piezoelectric properties of dentin continuously. The piezoelectric coefficients d33 of human dentin were tested ...学位:工学硕士院系专业:化学化工学院材料科学与工程系_材料物理与化学学号:20033601

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