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综述了研究CaCu_3Ti_4O_(12)材料反常巨介电特性的理论和实用意义。给出了CaCu_3Ti_4O_(12)结构示意图和X射线衍射(XRD)谱。评述了制备不同维度CaCu_3Ti_4O_(12)材料的常规制备方法、优缺点及低温下介电性能测定方法。从内禀和外赋的角度,分析了影响CaCu_3Ti_4O_(12)巨介电特性的各种可能因素。指出了目前该材料研究需要解决的一些问题。
The theoretical and practical significance of studying the anomalous giant dielectric properties of CaCu_3Ti_4O_ (12) materials is reviewed. The structure diagram of CaCu_3Ti_4O_ (12) and X-ray diffraction (XRD) spectra are given. The general preparation methods, advantages and disadvantages, and determination methods of dielectric properties of CaCu_3Ti_4O_ (12) materials with different dimensions were reviewed. From the perspective of intrinsic and extrinsic, various possible factors affecting the giant dielectric properties of CaCu_3Ti_4O_ (12) were analyzed. Points out some problems that need to be solved in the material research at present.