湖北大学学报（自然科学版）
湖北大學學報（自然科學版）
호북대학학보（자연과학판）
2015年
2期
139-142
,共4页
彭浩%徐芳%张卫%周桃生%尚勋忠
彭浩%徐芳%張衛%週桃生%尚勛忠
팽호%서방%장위%주도생%상훈충
无铅压电陶瓷%KNN%Li取代%结构%压电介电性能
無鉛壓電陶瓷%KNN%Li取代%結構%壓電介電性能
무연압전도자%KNN%Li취대%결구%압전개전성능
lead-free piezoelectric ceramics%KNN%Li substitute%microstructure%piezoelectric and dielectric properties
研究Li部分取代K对铌酸钾钠（KNN）无铅压电陶瓷性能的影响，选用（Na0.5K0.5-xLix）NbO3（NKLxN）的配方，通过固相法制备出优良性能的陶瓷样品；运用XRD、SEM研究不同Li含量陶瓷样品的相结构及显微组织；通过压电介电性能测试，确定Li取代K的最佳含量.结果表明，当Li的含量x=0.065时，其d33=205pC/N，kp=46.1%，εr=998，tanδ=0.047， TD=485℃.该NKLxN陶瓷性能优良，在高温压电陶瓷传感器、换能器等方面可能取代铅基压电陶瓷.
研究Li部分取代K對鈮痠鉀鈉（KNN）無鉛壓電陶瓷性能的影響，選用（Na0.5K0.5-xLix）NbO3（NKLxN）的配方，通過固相法製備齣優良性能的陶瓷樣品；運用XRD、SEM研究不同Li含量陶瓷樣品的相結構及顯微組織；通過壓電介電性能測試，確定Li取代K的最佳含量.結果錶明，噹Li的含量x=0.065時，其d33=205pC/N，kp=46.1%，εr=998，tanδ=0.047， TD=485℃.該NKLxN陶瓷性能優良，在高溫壓電陶瓷傳感器、換能器等方麵可能取代鉛基壓電陶瓷.
연구Li부분취대K대니산갑납（KNN）무연압전도자성능적영향，선용（Na0.5K0.5-xLix）NbO3（NKLxN）적배방，통과고상법제비출우량성능적도자양품；운용XRD、SEM연구불동Li함량도자양품적상결구급현미조직；통과압전개전성능측시，학정Li취대K적최가함량.결과표명，당Li적함량x=0.065시，기d33=205pC/N，kp=46.1%，εr=998，tanδ=0.047， TD=485℃.해NKLxN도자성능우량，재고온압전도자전감기、환능기등방면가능취대연기압전도자.
Effects of the process of K substituted partly by Li on the microstructure,dielectric and piezoelectric properties of KNN-base lead-free piezoelectric ceramics were investigated.(Na0.5K0.5-xLix)NbO3 (NKLxN) lead- free piezoelectric ceramics were synthesized by conventional mixed- oxide method.The microstructure,phase structure and electrical properties were investigated as a function of Li addition,the optimum by Li for K were determined via evaluation of the piezoelectric and dielectric properties of the resulting ceramics. The results show that the piezoelectric coefficient (d33),electromechanical coupling coefficient(kp)reaches to peak values,205 pC/N,46.1%andεr=998,tanδ=0.047,TD=485℃for the sample of x=0.065. The combination of high transition temperature,high piezoelectric performances makes the NKLxN ceramics prepared with the given process a very good candidate for replacing the lead-base piezoelectric ceramics in high-temperature piezoelectric sensors and transducers,etc.
