隨著國際環保意識的提高，使得許多含有對於環境及人體健康有疑慮的元素及材料已漸漸被禁止使用，而對於壓電陶瓷材料來說，也必定會朝開發出更優良的無鉛壓電材料方向去努力。
(Bi0.5Na0.5)TiO3為目前無鉛壓電材料中較具有潛力的材料系統，故本研究將以 (Bi0.5Na0.5)TiO3當作 matrix添加 Ba(Ti0.95Zr0.05)O3以合成出具有 MPB (morphotropic phase boundary) 存在之固溶系統，並針對此系統做詳盡的晶體結構及基本電性質的分析，以連結電性質和晶體結構之關係，並藉由實驗結果探討其應用為壓電材料的可能性。
經實驗結果可以確定以下幾點，第一，合成出 (1-x)(Bi0.5Na0.5)TiO3 - x Ba(Ti0.95Zr0.05)O3單一相存在的固溶系統，且本實驗中每一個成分點之燒結相對密度均達 97% 以上。第二，詳盡說明本系統隨著成份變動使其晶體變化的過程，在添加量 x介於0.06~0.08之間時，為 Hexagonal 與Tetragonal 兩相共存的區域，且經由計算得到其晶格常數、晶格體積及理論密度值。並經由 Rietveld 分析得到晶體結構中各離子的分布及偏移情形。第三，得到一系列成份於不同頻率下的介電常數，並提出晶體結構中氧八面體內陽離子中心與陰離子中心的相對位移量，為影響本系統在 1 MHz下之介電性質表現的主要因素。第四，確定此固溶系統具有壓電性，且最佳的 kp值可達 36.1%。第五，介於本系統之 MPB區域內的成分點，其介電常數及 kp值均明顯比周圍兩側要佳。

With the raising of the environmental sense, some materials which contain harmful health elements will be inhibited. For the piezoelectric materials, new lead-free piezoelectric materials with better electric properties will also be developed.
(Bi0.5Na0.5)TiO3 is a excellent candidate system in lead-free piezoelectric materials system at present. In this research, (Bi0.5Na0.5)TiO3 is matrix and Ba(Ti0.95Zr0.05)O3 will be doped into this composition system to synthesize (1-x) (Bi0.5Na0.5)TiO3 - x Ba(Ti0.95Zr0.05)O3 solid solution system which contains MPB (morphotropic phase boundary) region. The crystal structure and electric properties of this system were studied detail. According to the changes of the crystal structure and electric properties which resulted from the composition variation, the relationship between the crystal structure and electric properties, even the possibility of application were also studied further in this research.
The result show that: First, (1-x) (Bi0.5Na0.5)TiO3 - x Ba(Ti0.95Zr0.05)O3 solid solution system could be synthesized successfully in this research. And the relative density of sintered bulks of each composition can achieve 97% or over. Second, the phase transformation with composition variation of this system was showed in detail in this research. The MPB, Hexagonal and Tetragonal coexist, was found when x between 0.06 and 0.08. Besides, the cell parameters, cell volume, and theoretical density were also obtained after the cell parameters calculation. And the Rietveld method was adopted to get the relative position and displacement of each atom in the crystal structure. Third, get the dielectric constant of each composition at different frequency and propose the main factors which affect the dielectric properties in 1 MHz are the relative displacement between cation and anion center in oxygen-octahedral structure. Fourth, confirm this solid solution system has piezoelectric properties, and the value can get 36.1%. Fifth, dielectric constant and kp in MPB region are superior than surroundings.

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