首页|BaTiO3-Bi(Zn3/4 W1/4)O3无铅弛豫铁电陶瓷的制备及其储能性能的研究

BaTiO3-Bi(Zn3/4 W1/4)O3无铅弛豫铁电陶瓷的制备及其储能性能的研究

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采用固相反应法制备了(1-x)BaTiO3-xBi(Zn3/4 W1/4)O3[简称(1-x)BT-xBZW]无铅陶瓷电容器.X射线衍射结果表明,所制得的陶瓷均为钙钛矿结构,没有发现第二相的生成.随着BZW的引入使得BaTiO3陶瓷的晶相结构由四方相转变为伪立方相.采用SEM观察样品的晶粒尺寸和陶瓷表面的致密度,并对晶粒尺寸进行统计分析,陶瓷的平均晶粒尺寸从x=0.05时的2.36μm逐渐增大到x=0.20时的5.93μm.根据P-E曲线(电滞回线)可以观察到,添加适当量的BZW是调节BT弛豫行为的有效方法,能够有效提高陶瓷的储能性能.当掺杂量为x=0.15时,陶瓷具有最佳的储能特性,0.85 BT-0.15 BZW陶瓷的储能密度Wrec为1.14 J/cm3,储能效率η可达92.60%,同时具有优异的温度和频率稳定性.因此,(1-x)BT-xBZW陶瓷有望成为制造高稳定性的储能设备的潜在候选材料.
BaTiO3-Bi(Zn3/4 W1/4)O3 Lead-free Relaxor Ferroelectric Ceramics with Improved Energy Storage Properties
(1-x)BaTiO3-xBi(Zn3/4 W1/4 )O3[(1-x)BT-xBZW]lead-free ceramics were prepared via sol-id-state reaction method.X-ray characterization indicated that the as-obtained ceramics show perovskite structure without the formation of a second phase,the tetragonal phase of BaTiO3 (BT)transformed into a pseudo-cubic phase via introduction of BZW.The grain size and surface density of the samples were ob-served by SEM,average grain size of the ceramics gradually increased from~2.36μm at x=0.05 to~5.93μm at x=0.20.It was observed from P-E hysteresis loops that modification with appropriate a-mount of BZW was an effective approach to modulate relaxation behavior of BT,and its energy-storage performance was promoted significantly.Improved energy-storage performance of Wrec~1.14 J cm-3 and η~92.60% can be achieved in the 0.85BT-0.15BZW ceramics,accompanied with excellent tempera-ture and frequency stabilities.(1-x)BT-xBZW ceramics are expected to be a potential candidate for energy-storage equipment with high stability.

energy storagelead-free ceramicsBaTiO3relaxor ferroelectrics

冯海鹏、刘琪、刘广奥、周聪

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安徽工程大学 材料科学与工程学院,安徽 芜湖 241000

能量储存 无铅陶瓷 钛酸钡 弛豫铁电体

安徽省自然科学基金安徽工程大学中青年拔尖人才培养计划

2008085ME132S022021040

2024

安徽工程大学学报
安徽工程大学

安徽工程大学学报

影响因子:0.289
ISSN:2095-0977
年,卷(期):2024.39(3)