鍶鋇鈮SrXBa1-XNb2O6 (x=0.5)具有正方鎢青銅結構(Tetragonal Tungsten Bronze, TTB, SBN)，為非中心對稱的鐵電材料，並且為單軸弛滯性鐵電材料。單軸鐵電relaxor系統:SBN:Cr、SBN:Ce經由短暫的介電反應依存性的研究,可發現有一大的時效性影響。這結果會在domain coarsening和domain-wall pinning影響的基礎上討論。由於Cr3+和Ce3+不一樣的價數摻雜物此兩系統就有一基本上的差異。

鍶鋇鈮陶瓷是一種透光材料，而且具有很高的線性光電係數、高的焦電係數以及良好的光折射效應。儘管鍶鋇鈮單晶的成長技術及其性質已廣泛被研究，但因價格與製造上的困難故應用上有其限制所在，因此開發鍶鋇鈮多晶陶瓷乃必然趨勢。

本研究利用Cole-Cole plot探討純SBN以及摻雜Cr2O3或CeO2的介電性質，並討論其添加物對晶域壁(domain walls)動態變化的影響，並利用電滯曲線輔以分析添加物對晶域壁的影響。另外，以Debye-type function去擬合晶域壁(domain walls)在不同頻率下的變化。

　 SrXBa1-XNb2O6 (x=0.5) has Tetragonal Tungsten Bronze (TTB) structure and SBN is a non centro-symmerty ferroelectrics and an uniaxial “relaxor” ferroelectric. Large aging effects, investigated via temporal dependences of the dielectric response, are found to be inherent in the uniaxial ferroelectric relaxor systems SBN:Cr and SBN:Ce. The results are discussed on the basis of domain coarsening and domain-wall pinning effects. Owing to the different charge disorder induced by the Cr3+ and Ce3+ dopants, a fundamental difference between both systems is established.

　　Strontium barium niobate ( SBN ) ceramic is a good electro-optic material .It has very high linear electro-optical coefficient、high pyroelectric coefficient and good photorefractive effect . Though the properties of the single crystal , SBN , has been intensively studied, high cost and difficult fabrication have limited its practical use. Hence, it is necessary to develop strontium barium niobate ceramic.

　　We take advantage of Cole-Cole plot and hysteresis loop to discuss the dielectric property of pure SBN and doping Cr2O3、CeO2 and the effects of domain walls dynamic variation for different impuries. Besides, we fit the domain walls dynamic variation at different frequencies by Debye-type function.

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