论文标题
通过低温水热加工阐述的无铅BCZT陶瓷的结构，介电和铁电特性
Structural, Dielectric and Ferroelectric Properties of Lead-free BCZT Ceramics Elaborated by Low-temperature Hydrothermal Processing
论文作者
论文摘要
与铅基材料相比，无铅BA0.85CA0.15ZR0.10TI0.90O3（BCZT）陶瓷表现出了出色的介电，铁电和压电性能。先前使用Sol-Gel方法随后是水热途径，在低温为25、80和160 C下纯和结晶BCZT纳米植物的合成。在这项研究中，研究了1250°C的烧结BCZT陶瓷的结构，介电和铁电特性10H。 XRD测量结果表明，在室温下存在单个钙钛矿相，并且具有正交和四方对称性的共存。 BCZT陶瓷中晶粒尺寸的增加和陶瓷密度的增加导致BCZT陶瓷的介电和铁电特性增强。更有趣的是，与固态反应相比，与固态反应相比，BCZT粉末具有高介电性和铁电特性的合成温度可以降低至160°C的低温，与固态反应相比，该温度低约1200°C。在160°C下阐述的BCZT陶瓷显示出出色的电性能。因此，低温水热加工的使用可以鼓励使用具有高介电性和铁电特性的无铅陶瓷。
Lead-free Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) ceramics have demonstrated excellent dielectric, ferroelectric and piezoelectric properties in comparison to lead-based materials. The synthesis of pure and crystalline BCZT nanopowders at low temperatures of 25, 80 and 160 C was reported previously by using a sol-gel method followed by a hydrothermal route. In this study, the structural, dielectric and ferroelectric properties of sintered BCZT ceramics at 1250 °C for 10h were investigated. XRD measurements revealed the presence of a single perovskite phase at room temperature with the coexistence of the orthorhombic and tetragonal symmetries. The increase of grain size and the ceramic density in BCZT ceramics result in an enhancement of the dielectric and ferroelectric properties of BCZT ceramics. More interestingly, the synthesis temperature of BCZT powders with high dielectric and ferroelectric properties could be decreased to a low temperature of 160 °C, which is about 1200 °C lower when compared with solid-state reaction and 840 °C lower when compared with sol-gel methods. The BCZT ceramics elaborated at 160 °C revealed excellent electrical properties. Hence, the use of low-temperature hydrothermal processing can be encouraging for the synthesis of lead-free ceramics with high dielectric and ferroelectric properties.
