鈦酸鉍鈉基非鉛鐵電材料之結構與電性研究

Structures and Electrical Properties of (Bi0.5Na0.5)TiO3–Base Lead-Free Ferroelectric Material

蔡美惠(Mei-Huei Tsai)

指導教授 ： 曾俊元

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2010年)

摘要

隨著國際環保意識提升，許多對人體及環境有害之元素及材料已逐步被禁止使用。各國政府開始制定相關法令，於2006年7月歐盟實行危害物質限用指令 (RoHS, Restriction of Hazardous Substance) ，主要管制電子電機設備產品中所使用之重金屬－ Pb、Cd、Hg、Cr6+、PBBs及PBDE 等6 項化學物質。近年來，也開始逐步發展與環境協調性佳、性能優異且資源消耗性少之新型壓電材料及元件，因此，尋求取代鉛系鐵電材料之非鉛鐵電材料，成為目前主要之議題。
本實驗為研究鈦酸鉍鈉基 ((Bi0.5Na0.5)TiO3-Base)之複合型 (Bi0.5Na0.5)(Mg1/3Nb2/3)O3固溶體陶瓷系統，並探討其燒結體之鐵電性質。分別利用固態反應法、鈳鐵礦法及階段式合成法合成出(Bi0.5Na0.5)(Mg1/3Nb2/3)O3固溶系統。以X光繞射、電子顯微鏡、拉曼光譜等探討其成份及微結構，並量測其鐵電及介電特性。根據實驗結果來做晶體結構、相變化、缺陷以及基本電性質的分析，並藉由摻雜(Bi0.5K0.5)TiO3(BKT)成分改變所產生之效應進而探討物理性質和電性質間的關連性及實際應用為鐵電材料的可能性。

關鍵字

非鉛 ； 鈦酸鉍鈉基 ； 鈣鈦礦結構 ； 鈳鐵礦先驅物法 ； 鐵電 ； 介電特性

並列摘要

The consciousness of international environment raises with times. It has been forbidden to use harmful element and material for human body and environment gradually. The governments of various countries formulated the relational law. The European Union executed RoHS (Restriction of Hazardous Substance) in July, 2006. The issues primarily controls the product of electrical machinery equipment to use heavy metal, ex: Pb, Cd, Hg, Cr6+, PBBS, PBDE and so on. It also started to develop the better, outstanding performance and resources consumptive piezoelectric material with coordination of environment in recent years. Therefore, the lead ferroelectric was replaced lead-free ferroelectrics material to become the present main subject.
The research study the (Bi0.5Na0.5)TiO3-Base for compound (Bi0.5Na0.5)(Mg1/3Nb2/3)O3 (BNMM) solid solution ceramics system and study the ferroelectric properties of the BNMN bulks. BNMN ceramics were prepared by using solid state reaction techniques and columbite method in this study. The composition, microstructure and electric properties of BNMN ceramics were measured by X-ray diffraction, scanning electron microscopy and raman spectrometer. The BNMN were doping (Bi0.5K0.5)TiO3 (BKT) to change the composition which induced the effect to discuss the relation between physical property and electrical property and application for the possibility of ferroelectric materials.

並列關鍵字

Lead-free ； (Na0.5Bi0.5)TiO3-base ； Columbite ； Piezoelectric ； Dielectric

參考文獻

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