壓電諧波傳感及壓電、電化學(xué)雙阻抗聯(lián)用新技術(shù)及其應(yīng)用.pdf

1、湖南大學(xué)博士學(xué)位論文壓電諧波傳感及壓電、電化學(xué)雙阻抗聯(lián)用新技術(shù)及其應(yīng)用姓名：周安宏申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：分析化學(xué)指導(dǎo)教師：姚守拙2000.9.1湖南大學(xué)分析化學(xué)專業(yè)博士學(xué)垃論文：壓電旨被傳感及壓電、電化學(xué)雙阻抗聯(lián)用新技術(shù)及其應(yīng)用(周安宏)ABSTRACTSinceSauerbreyfirstreportedthattheoscillationfrequencyofaresonatingpiezoelectricquartzcrysta

2、ls(PQC)islinearlyrelatedtothemassuptakeorremovalontheelectrodesurfacein1959，suchcrystalshavebeenusedasamasssensorfordetectioningasphaseIntheearliereighties，therehasbeenanincreasingamountofattentionpaidtoapplicationsofthe

3、PQCsensorafterthediscoverythatPQCcanbesustainedinaliquidenvironment，includingwaterandothersolventsOwingtoitssensitiveresponsestomassandbulkliquidpropertiesaswellsuchasdensityviscosityperminivityandconductivityPQCapplicat

4、ionshavebeenextendedtothefieldsofclinicimmunology，bloodrheology，biochemistrymolecularbiologyandmaterialphysico—chemistryOnlyafewcontributionshavebeingconcentratedonthestudiesofthePQCbehaviorsingaseousandliquidphasesbased

5、onharmonicresonating，oronthecombinationsofpiezoelectricimpedancetechniqueandelectrochemicalimpedancespectroscopy(ZIS)Inthisthesis，apiezoelectricharmonicsensingtheoryhasbeenproposedandtheconstructionandapplicationsofthisd

6、ualimpedancetechniquehasbeendevelopedThemainresultsaresummarizedasfollows：1BasedontheButterworthVanDyke(BVD)equivalentcircuitmodelworkinginharmonicmode，theoreticalequationsrelatingbothmasseffectandviscositydensityeffectt

7、othefrequencyshift(△矗)andthemotionalresistance僻1)ofthePQCsensorarederived，inwhichthefundamentalfrequencyfro)，harmonicnumber(h)andthenumberoffacesofaPQCcontactingtheliquid㈣areinvolved，andtheinfluencesoftheparametersf0，han

8、dNonresponsesofAfoandRlinviscousliquidsarealsoinvestigatedTheauthorsuggeststhat，byanalyzingtheratioofAfdRl，onecouldqualitativelyestimatethemagnitudeoftheindividualcontributionsfrommassandviscosity—densityeffectstothetota

9、lfrequencyshift2InBVDmodel，themoregeneralexpressionsoftheseriesresonantfrequencyandtheparallelresonantfrequencyarederivedBasedonthesetwoexpressions，thedifferenceintheelectromechanicalcouplingfactorforPQCingaseousandliqui