CAJ | 학술논문

采用溶胶-凝胶法制备出(Ba0．9 Ca0．1)(Zr0．15 Ti0．85)O3(简称BCT-BZT)粉体,并采用两段式传统烧结法用较低的烧结温度(1290℃)制备了该无铅压电陶瓷,运用热重差示扫描测量法分析了反应过程.X射线衍射测试结果表明,BCT-BZT粉体和陶瓷均是典型的钙钛矿结构,根据谢乐公式计算出粉体的晶粒尺寸约为32 nm.此外,室温下利用 TF Analyzer 2000铁电分析仪测得该陶瓷的介电常数高达6134,居里温度约为95℃,最大压电系数d33达到263 pm/V.利用此方法制备的 BCT-BZT 无铅压电陶瓷,其烧结温度与固相反应法相比降低了约200℃左右,同时还保持了良好的压电性能,从而降低了烧结成本,有利于实现该陶瓷的大规模工业化生产.
채용용효-응효법제비출(Ba0．9 Ca0．1)(Zr0．15 Ti0．85)O3(간칭BCT-BZT)분체,병채용량단식전통소결법용교저적소결온도(1290℃)제비료해무연압전도자,운용열중차시소묘측량법분석료반응과정.X사선연사측시결과표명,BCT-BZT분체화도자균시전형적개태광결구,근거사악공식계산출분체적정립척촌약위32 nm.차외,실온하이용 TF Analyzer 2000철전분석의측득해도자적개전상수고체6134,거리온도약위95℃,최대압전계수d33체도263 pm/V.이용차방법제비적 BCT-BZT 무연압전도자,기소결온도여고상반응법상비강저료약200℃좌우,동시환보지료량호적압전성능,종이강저료소결성본,유리우실현해도자적대규모공업화생산.
The (Ba0.9 Ca0.1 )(Zr0.15 Ti0.85 )O3 powders had been successfully prepared by sol-gel method,and the BCT-BZT lead free piezoelectric ceramics were obtained by traditional two-step sintering method under lower temperature (1 290 ℃).The reaction process was analyzed with the help of the thermo gravimetric and differen-tial scanning calorimetry.X-ray diffraction results showed that the structure of the BCT-BZT powders and ce-ramics were typical perovskite structure and the particle size was approximately 32 nm by Scherrer calculation. Moreover,the dielectric constant of ceramic was 6 134 at the room temperature by TF analyzer 2 000;the Curie temperature was about 95 ℃.Especially,the piezoelectric response loops revealed that the maximum piezoelec-tric coefficient d33 reached 263 pm/V.We successfully get BCT-BZT lead-free piezoelectric ceramics by the method,the sintering temperature was about 200 ℃ lower than the solid phase reaction method,maintaining the good piezoelectric properties and reducing the sintering costs.So,it was conducive to realizing the large-scale industrial production of ceramics.