摘要
用化学分析法确定了Ba1-xPbxTiO3和Ca1-xPbxTiO3纳米粉料的化学组成,测定了在不同焙烧温度下试样的红外吸收光谱(IR)和X射线衍射谱(XRD),解析了价键结构的变化及归属,结合差热分析,确定了试样的晶化温度为700℃左右,比传统的固相法要低得多。并利用Scherrer公式,计算了Ba1-xPbxTiO3和Ca1-xPbxTiO3纳米晶平均粒径分别为39nm和33nm,四方相畸变度δ分别为1.0682和1.0630,讨论了纳米级粉料的粒径对低频区域特征振动谱带形状及强度的影响,结果表明用化学共沉淀法制备的粉料其均匀度、分散性等均好于固相法。
The mole ratio of compositional atoms of Ba1-xPbxTiO3 and Ca1-xPbxTiO3 weredetermined by chemical analysis method. Powder samples were characterized to confirm the appropriate temperature range of calcinations and decomposed process by IR, DTA and XRD. The average grain size of BPT is aboutn 39nm and 33nm for PCT. The experimental results show the peak shape and relative strength of absorption are related to the grain sizes. The distortion factor of BPT and PCT nanocrystaline are 1. 0682 and 1. 0630,respectively. It shows that the degree of consistency and dispersancy of the powder samples which prepared by chemical coprec; pitation are better than that of which prepared by solid phase method.
出处
《贵州大学学报（自然科学版）》
2003年第4期388-391,共4页
Journal of Guizhou University:Natural Sciences
