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Lithium sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
The invention discloses a lithium-sodium niobate-based leadless piezoelectric ceramic and a preparation method thereof. The chemical general formula of the lithium-sodium niobate-based leadless piezoelectric ceramic is (1-x) Li < alpha > Na < 1-alpha > Nb < 3-x > BaTiO < 3 >; the preparation method comprises the following steps: in the preparation process, mixing Li2CO3, Na2CO3, Nb2O5, TiO2 and BaCO3, adding absolute ethanol for ball milling, drying to obtain mixed powder, and presintering the powder; carrying out secondary ball milling on the pre-sintered powder, and then carrying out cold press molding to obtain a ceramic rough blank; sintering the ceramic rough blank at high temperature in an air atmosphere to obtain a ceramic sample; and finally, carrying out polarization treatment onthe sample to obtain the lithium sodium niobate-based leadless piezoelectric ceramic. The lithium sodium niobate-based leadless piezoelectric ceramic prepared by the invention not only has the characteristics of high piezoelectric coefficient, high dielectric constant and high electromechanical coupling coefficient, but also has the advantages of easily available raw materials, simple components,no highly toxic element lead and reduced environmental burden; and the preparation process is simple and short in time consumption. The method has a wide application prospect.
本发明公布了一种铌酸锂钠基无铅压电陶瓷及其制备方法，所述铌酸锂钠基无铅压电陶瓷由下列所示的化学通式所组成(1‑x)LiαNa1‑αNbO3‑xBaTiO3；在制备过程中，将Li2CO3、Na2CO3、Nb2O5、TiO2、BaCO3混合加入无水乙醇球磨，烘干得到混合粉料，将该粉料进行预烧结；对预烧结后的粉料进行二次球磨，然后冷压成型得到陶瓷粗坯；陶瓷粗坯在空气气氛中高温烧结得到陶瓷样品，最后对样品进行极化处理得到铌酸锂钠基无铅压电陶瓷。本发明制备的铌酸锂钠基无铅压电陶瓷不仅具有高压电系数、高介电常数和高机电耦合系数的特点，同时还具有原料易于获得、成分简单不含剧毒元素铅、减少环境负担的优点；且制备工艺简单，耗时短。本发明具有广阔的应用前景。
Lithium sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
The invention discloses a lithium-sodium niobate-based leadless piezoelectric ceramic and a preparation method thereof. The chemical general formula of the lithium-sodium niobate-based leadless piezoelectric ceramic is (1-x) Li < alpha > Na < 1-alpha > Nb < 3-x > BaTiO < 3 >; the preparation method comprises the following steps: in the preparation process, mixing Li2CO3, Na2CO3, Nb2O5, TiO2 and BaCO3, adding absolute ethanol for ball milling, drying to obtain mixed powder, and presintering the powder; carrying out secondary ball milling on the pre-sintered powder, and then carrying out cold press molding to obtain a ceramic rough blank; sintering the ceramic rough blank at high temperature in an air atmosphere to obtain a ceramic sample; and finally, carrying out polarization treatment onthe sample to obtain the lithium sodium niobate-based leadless piezoelectric ceramic. The lithium sodium niobate-based leadless piezoelectric ceramic prepared by the invention not only has the characteristics of high piezoelectric coefficient, high dielectric constant and high electromechanical coupling coefficient, but also has the advantages of easily available raw materials, simple components,no highly toxic element lead and reduced environmental burden; and the preparation process is simple and short in time consumption. The method has a wide application prospect.
本发明公布了一种铌酸锂钠基无铅压电陶瓷及其制备方法，所述铌酸锂钠基无铅压电陶瓷由下列所示的化学通式所组成(1‑x)LiαNa1‑αNbO3‑xBaTiO3；在制备过程中，将Li2CO3、Na2CO3、Nb2O5、TiO2、BaCO3混合加入无水乙醇球磨，烘干得到混合粉料，将该粉料进行预烧结；对预烧结后的粉料进行二次球磨，然后冷压成型得到陶瓷粗坯；陶瓷粗坯在空气气氛中高温烧结得到陶瓷样品，最后对样品进行极化处理得到铌酸锂钠基无铅压电陶瓷。本发明制备的铌酸锂钠基无铅压电陶瓷不仅具有高压电系数、高介电常数和高机电耦合系数的特点，同时还具有原料易于获得、成分简单不含剧毒元素铅、减少环境负担的优点；且制备工艺简单，耗时短。本发明具有广阔的应用前景。
Lithium sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
一种铌酸锂钠基无铅压电陶瓷及其制备方法
WANG KE (Autor:in) / LI-CHEN BOWEN (Autor:in) / LI JINGFENG (Autor:in) / GONG WEN (Autor:in) / WU CHAOFENG (Autor:in) / YU SHENGPING (Autor:in) / GAO HONGWEI (Autor:in) / ZHANG DANYANG (Autor:in) / LI GENG (Autor:in)
13.11.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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