Pandey Dhananjai, Singh Akhilesh Kumar, Baik Sunggi
School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi-221 005, India.
Acta Crystallogr A. 2008 Jan;64(Pt 1):192-203. doi: 10.1107/S0108767307055511. Epub 2007 Dec 21.
The morphotropic phase boundary in the phase diagram of the technologically important Pb(ZrxTi1-x)O3 (PZT) ceramics has been traditionally believed to separate ferroelectric tetragonal and rhombohedral phase regions. This old picture has come under close scrutiny during the last eight years following the discovery of new monoclinic phases in the Cm and Cc space groups. This article presents a brief overview of these discoveries in which the use of multiple diffraction probes (X-ray, electron, neutron diffraction) in conjunction with physical property measurements has played a crucial role. A new phase diagram of PZT showing the stability fields of these structures below room temperature is also presented.
在技术上重要的Pb(ZrxTi1-x)O3（PZT）陶瓷相图中，传统上认为同形相界将铁电四方相和菱面体相区域分隔开来。在发现Cm和Cc空间群中的新单斜相之后的过去八年里，这一传统观点受到了密切审视。本文简要概述了这些发现，其中多种衍射探针（X射线、电子、中子衍射）与物理性质测量相结合发挥了关键作用。还给出了一个新的PZT相图，展示了这些结构在室温以下的稳定区域。
