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Preparation method for improving strain performance of potassium sodium niobate ferroelectric ceramic by doping lanthanum oxide
The invention discloses a preparation method for improving the strain performance of lanthanum oxide doped potassium sodium niobate ferroelectric ceramic. The chemical composition of the prepared lanthanum oxide doped potassium sodium niobate ferroelectric ceramic is 0.97 (K < 0.5 > Na < 0.5 >) < 0.985 > La < 0.0050 > NbO < 3 >-0.03 SrTiO3 ferroelectric ceramic, and the internal ceramic is doped with a proper amount of titanium lanthanum oxide; the preparation method comprises the following steps: (1) mixing and drying raw materials; (2) sieving and calcining the mixture; (3) carrying out ball milling, drying and forming on the calcined material; (4) dumping and sintering the biscuit, and then testing the phase and the microstructure; and (5) carrying out grinding, silver brushing and silver firing on the ferroelectric ceramic wafer, and then carrying out ferroelectric performance and strain performance testing. The KNN-based ferroelectric ceramic has the technical characteristics that the KNN-based ferroelectric ceramic has a dispersed orthogonal-tetragonal two-phase coexisting structure, the strain (S%) reaches 0.16% under 40kV/cm, the KNN-based ferroelectric ceramic can be used in equipment when the general strain performance is higher than 0.1%, and the KNN-based ferroelectric ceramic prepared by the method has very good strain performance.
本发明公开了一种氧化镧掺杂提高铌酸钾钠铁电陶瓷应变性能的制备方法，所述制备化学组成如下：0.97(K0.5Na0.5)0.985La0.0050NbO3‑0.03SrTiO3铁电陶瓷，内部陶瓷以适量钛氧化镧掺杂；所述制备方法如以下步骤：(1)原料混合、烘干；(2)混合料过筛、煅烧；(3)煅烧料球磨、烘干、成型；(4)素坯排胶、烧结，之后进行物相、微观形貌测试；(5)铁电陶瓷片打磨、刷银、烧银，之后进行铁电性能及应变性能测试。本发明技术特点，KNN基铁电陶瓷具有弥散的正交‑四方两相共存结构，在40kV/cm下，应变(S％)达到0.16％，一般应变性能高于0.1％就可以用于设备中，本发明制备的铌酸钾钠基铁电陶瓷具有非常好的应变性能。
Preparation method for improving strain performance of potassium sodium niobate ferroelectric ceramic by doping lanthanum oxide
The invention discloses a preparation method for improving the strain performance of lanthanum oxide doped potassium sodium niobate ferroelectric ceramic. The chemical composition of the prepared lanthanum oxide doped potassium sodium niobate ferroelectric ceramic is 0.97 (K < 0.5 > Na < 0.5 >) < 0.985 > La < 0.0050 > NbO < 3 >-0.03 SrTiO3 ferroelectric ceramic, and the internal ceramic is doped with a proper amount of titanium lanthanum oxide; the preparation method comprises the following steps: (1) mixing and drying raw materials; (2) sieving and calcining the mixture; (3) carrying out ball milling, drying and forming on the calcined material; (4) dumping and sintering the biscuit, and then testing the phase and the microstructure; and (5) carrying out grinding, silver brushing and silver firing on the ferroelectric ceramic wafer, and then carrying out ferroelectric performance and strain performance testing. The KNN-based ferroelectric ceramic has the technical characteristics that the KNN-based ferroelectric ceramic has a dispersed orthogonal-tetragonal two-phase coexisting structure, the strain (S%) reaches 0.16% under 40kV/cm, the KNN-based ferroelectric ceramic can be used in equipment when the general strain performance is higher than 0.1%, and the KNN-based ferroelectric ceramic prepared by the method has very good strain performance.
本发明公开了一种氧化镧掺杂提高铌酸钾钠铁电陶瓷应变性能的制备方法，所述制备化学组成如下：0.97(K0.5Na0.5)0.985La0.0050NbO3‑0.03SrTiO3铁电陶瓷，内部陶瓷以适量钛氧化镧掺杂；所述制备方法如以下步骤：(1)原料混合、烘干；(2)混合料过筛、煅烧；(3)煅烧料球磨、烘干、成型；(4)素坯排胶、烧结，之后进行物相、微观形貌测试；(5)铁电陶瓷片打磨、刷银、烧银，之后进行铁电性能及应变性能测试。本发明技术特点，KNN基铁电陶瓷具有弥散的正交‑四方两相共存结构，在40kV/cm下，应变(S％)达到0.16％，一般应变性能高于0.1％就可以用于设备中，本发明制备的铌酸钾钠基铁电陶瓷具有非常好的应变性能。
Preparation method for improving strain performance of potassium sodium niobate ferroelectric ceramic by doping lanthanum oxide
一种氧化镧掺杂提高铌酸钾钠铁电陶瓷应变性能的制备方法
LI MIN (author) / WANG JIANGJIE (author) / CHEN JIANBING (author)
2024-09-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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