【纳米晶铁电薄膜的制备表徵及气敏元件的研制】彭作岩.pdf

【纳米晶铁电薄膜的制备表徵及气敏元件的研制】彭作岩.pdf

摘 要 纳米固还材料的研究是目前新型功能材料研究领域中最有活力、进展最迅速、研究范围最广泛的领域之一由于纳米固体材料既无长 程有序,也无短程有序,具有与常规体材料极不相同的特殊结构,使 究及应用前景、美国材料协会已把它预测为二十一世纪最有前途的材 料之一,有着广阔的应用前景.铁电材科由于其具有大的光电系数、小的介电系数及强的热电,压电效应,可应用于红外探测器,存储器及光电器件等,因而也是目 前极为活跃的研究领域之-:我们采用So1-Ge！Abstract pnas on nanocrystalline soiid materiaisisoneof the mostvital fieldsUotonow.there havebeen greatprogresses duricga decade and more.T The structure ofnanocrystaliine solia materiais is differentfromthe two known solid-state structures:tnecrystailinestate(with long-range order)ana the giassyatoms increased.theionicity ofcrystal enchaned.The situation of atoms changed greatly,so thevibration modesraised.Thespectra became complex.the amountof Tedshiftincreased and the spectra bands became wider and flatter,until the characteristic spectra bands nearly disapeared.