(1. 中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室，長沙 410083；
2. 中電科技集團(tuán)重慶聲光電有限公司，重慶 401332)
摘 要: 采用靜電紡絲法制備無鉛壓電陶瓷0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BCZT)納米線，重點(diǎn)研究制備工藝優(yōu)化和納米線的壓電性能。首先探索穩(wěn)定性優(yōu)異的BCZT溶膠配置方法，再利用靜電紡絲法制備BCZT納米線，研究靜電紡絲參數(shù)和熱處理?xiàng)l件對BCZT納米線形貌和結(jié)晶性的影響。結(jié)果表明：最佳的靜電紡絲工藝參數(shù)為環(huán)境溫度40 ℃、環(huán)境濕度50%RH、施加電壓15 kV、供液速度1.00 mL/h、滾筒收集轉(zhuǎn)速800 r/min、接收距離15 cm。經(jīng)過(120 ℃, 12 h)的烘干處理以及(900 ℃, 1 h)的退火處理，可以獲得純鈣鈦礦相、結(jié)晶性好、長徑比大的BCZT納米線。利用壓電力顯微鏡分析該納米線的壓電響應(yīng)，證實(shí)其具有多疇結(jié)構(gòu)和明顯的極化反轉(zhuǎn)行為。
關(guān)鍵字: 鋯鈦酸鋇鈣；納米線；靜電紡絲；壓電響應(yīng)
（1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Chongqing Acoustic-Opitc-Electronic Co., LTD., Chongqing 401332, China）
Abstract:The electrospinning preparation optimization of lead-free piezoelectric 0.5Ba(Zr0.2Ti0.8)O3- 0.5(Ba0.7Ca0.3)TiO3 (BCZT) nanowires and the piezoelectric response were investigated systematically. The preparation of stable BCZT sol was firstly explored for obtaining the electrospinning solution. The study was mainly focused on the effects of electrospinning and heat treatment parameters on the morphology and crystallinity of prepared BCZT nanowires. The results show that optimized electrospinning parameters are as follows: ambient temperature of 40 ℃, humidity of 50%RH, voltage of 15 kV, solution supply speed 1.00 mL/h, roller speed of 800 r/min, distance between needle tip and roller of 15 cm. The electrospinning BCZT nanowires are dried at 120 ℃ for 12 h and then annealed at 900 ℃ for 1h. As a result, pure perovskite-structured, highly crystalline, and dense BCZT nanowires with a large aspect ratio can be obtained. Moreover, the PFM measurement indicates the piezoelectricity of as-prepared BCZT nanowires, which is evidenced by the obvious ferroelectric domain structure and local polarization switching behavior.
Key words: BCZT; nanowire; electrospinning; piezoelectricity
