鈮錳銻鋯鈦酸鉛熱釋電陶瓷的熱壓燒結(jié)工藝研究.pdf

1、華中科技大學碩士學位論文鈮錳銻鋯鈦酸鉛熱釋電陶瓷的熱壓燒結(jié)工藝研究姓名：鄧峰申請學位級別：碩士專業(yè)：微電子學與固體電子學指導教師：姜勝林20070531華中科技大學碩士學位論文華中科技大學碩士學位論文IIABSTRACTHighperfmanceinexpensivepyroelectricinfraredsenssplayanimptantroleinthefieldofthermaldetectionimagingofobjects

2、.Sothepropertiesofpyroeletricmaterialshaveattractedmanyresearchers.Asthegrainsizeofhotpressedmaterialsissmallunifmthegrainboundaryistightseldomcongealsimpuritiessothiskindofmaterialsaretransparentwithhighrigidity.Sohotpr

3、essedPMNSZTmaterialsarestudiedinthisarticle.TheinfluencesofOxygenatmospheretothepropertiesthemicrostructureofthematerialhavebeenstudiedtheeffectofoxygenatmosphereineliminatingtheoxygenvacanciesisdiscussed.Thesinteringtem

4、peraturewithoxygenhotpresspressuretothepropertiesthemicrostructureofthematerialshavebeendiscussedtheeffectofhotpresspressureincompactingthematerialisanalyzed.Themainconclusionsareasfollow:ItcouldbeinferredfromtheSEMpictu

5、rethatthegrainsizeunifmityofoxygensinteringmaterialisbetterthanthatofthetraditionalsinteredbodies.thegraingrowthofoxygensinteredmaterialisfavablethegrainboundaryisclearwiththegrainscompactedtogether.Theconclusioncouldbed

6、rawnthatoxygensinteringcouldreducethesinteringtemperatureofthematerialsoasthatthegrainsizeofoxygensinteredmaterialislargerthanthatofthetraditionalsinteredsamplesatthesametemperature.Greenbodiesareoxygensinteredatdifferen

7、ttemperature.Throughcomparisontheceramicbodysinteredat1210℃hashigherpyroelectriccoefficientasmuchas20108Ccm2Kfrom33to36℃therelavantFDreachesashighas22105Pa0.5.AnalyticallythehighpyroelectriccurrentmaybecausedbyFRLFRHphas

8、etransition.Greenbodiesareoxygensinteredatdifferentpressureat1210℃throughSEMpicturestheconclusioncouldbedrawnthatwiththeincreasementofhotpressurethesizeofthegrainisincreasingtootheshapeofthegrainischangingfromroundtopoly