多鐵性單相固溶體的制備與磁性能
(中國科學(xué)院 金屬研究所，沈陽 110016)
摘 要: 采用溶膠−凝膠法制備具有復(fù)合鈣鈦礦結(jié)構(gòu)的單相固溶體(1−x)Pb(Fe2/3W1/3)O3-xBiFeO3，利用X射線衍射技術(shù)對其晶體結(jié)構(gòu)進(jìn)行研究，結(jié)合掃描電鏡觀察分析其形貌尺寸，并對不同摻雜條件下固溶體的磁性能進(jìn)行測試。結(jié)果表明： BiFeO3的加入能降低Pb(Fe2/3W1/3)O3的燒結(jié)溫度，當(dāng)摻雜系數(shù)x由0.1 增加到0.6時，對應(yīng)的單相燒結(jié)溫度由700 ℃降低到550 ℃。當(dāng)x≤0.6時，其晶體結(jié)構(gòu)為鈣鈦礦型結(jié)構(gòu)；而當(dāng)x＞0.6時，晶體結(jié)構(gòu)不再為單一鈣鈦礦相。其中，當(dāng)x =0.25時的單相鈣鈦礦結(jié)構(gòu)固溶體0.75Pb(Fe2/3W1/3)O3-0.25BiFeO3的磁性能比較突出。
關(guān)鍵字: 鈣鈦礦；多鐵性材料；溶膠−凝膠法；顯微結(jié)構(gòu)；磁性能
single phase solid solution Pb(Fe2/3W1/3)O3-BiFeO3
（Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China）
Abstract:(1−x)Pb(Fe2/3W1/3)O3-xBiFeO3 single phase solid solution was synthesized by sol-gel method. The crystal structures and morphologies were studied by X-ray diffractometry and scanning electron microscopy, respectively, and its magnetic performance was also investigated. The results show that the addition of BiFeO3 decreases the sintering temperature of Pb(Fe2/3W1/3)O3 from 700 to 550 ℃, as the doping coefficient x increases from 0.1 to 0.6. When x≤0.6, the crystal structure is confirmed as perovskite type indicating a single phase solid solution, whereas it cannot keep the same perovskite structure when x＞0.6. The single phase solid solution 0.75Pb(Fe2/3W1/3)O3-0.25BiFeO3 displays better magnetization than any others when x=0.25.
Key words: perovskite; multiferroic material; sol-gel method; microstructure; magnetization
