(Bi0.5Na0.5)TiO3無鉛壓電陶瓷添加燒結促進劑PBS之微結構與介電特性研究及其應用

Study for Microstructures and Dielectric Properties of lead-free Piezoelectric Ceramic (Bi0.5Na0.5)TiO3 with Sintering Aids PBS Additives And Its Applications

郭志偉(Chih-Wei Kuo)

指導教授 ： 廖慶聰 ； 翁敏航 ； 洪興林

崑山科技大學/工程學院/機械工程研究所/碩士(2007年)

摘要

近年來，由於國際上對於環境保護與能源節省的日漸重視，目前許多對環境保護與人體健康存有污染、危害因素的元素及材料，已逐漸被下令限期禁止使用。現階段應用甚為廣泛的壓電材料－鋯鈦酸鉛(PZT)系列材料，勢必會面臨被淘汰使用的命運。未來製造壓電材料必定要重新評估其應用材料與生態環境的協調性以及與生存環境污染惡化的問題。因此，針對有益於環境及維持世界社會發展的觀點而言，發展新的無鉛壓電材料是必要且有急迫性。
(Bi0.5Na0.5)TiO3為目前無鉛壓電陶瓷材料中，較具有發展前途的材料系統之一，因此本研究主要以(Bi0.5Na0.5)TiO3為基底材料，針對添加燒結促進劑PBS-glass之BNT系統探討其對(Bi0.5Na0.5)TiO3微結構與電特性之影響。此外並藉由製作超音波換能器元件，評估(Bi0.5Na0.5)TiO3無鉛壓電陶瓷材料其應用於壓電元件上之可行性。

關鍵字

燒結促進劑 ； 複合型鈣鈦礦結構 ； 液相燒結 ； 無鉛 ； 鈦酸鉍鈉 ； 壓電陶瓷

並列摘要

Recently, more people pay attention to several important issues about environmental protection and energy reducetion around the world. The use of materials caused environmental pollution and toxic to human health may be prohibited by law in the neer future. Although lead-based piezoelectric materials such as PZT are presently most widely used in practical industry. Unfortunately, due to the toxicity of lead oxide, PZT materials will be limited to use eventually. In the fature, new synthesized piezoelectric materials have to evaluate the impact on both ecological environment and environmental pollution problems hefore their applications. Thesefore, form the viewpoint of environment-friendly and sustainalle development of the world soaiety, it is necessary and urgent to synthesize new lead-free piezoelectric materials.
Ameng the lead-free piezoelectric ceramics, BNT is the most attractive due to is excellent piezoelectric properties. In this study the effects of the amount of sintering aid PBS additive on microstructures and dielectric properties of BNT based ceramics are investigated. In addition, we fabricecte some ultrasound transducers to evaluate the feasibility of applying BNT into piezoelectric device designs.

並列關鍵字

complex perovskite structure ； piezoelectric ceramic ； (Bi0.5Na0.5)TiO3 (BNT) ； lead-free ； sintering aids ； liquid phase sintering.

參考文獻

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