Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of leadless piezoelectric ceramic material
The invention belongs to the technical field of leadless piezoelectric ceramic materials and preparation methods thereof, and particularly relates to a preparation method of a leadless piezoelectric ceramic material. The invention aims to provide an economical, effective and lead-pollution-free method for preparing potassium-sodium niobate (KNN) piezoelectric ceramic. A KNN-xCZ ceramic is preparedby a solid-phase synthesis process, and is pre-sintered, crushed and ball-milled, so the grain size distribution becomes uniform, and the density is increased; CaZrO3 is introduced to achieve Tc andT0-T movement in the low-temperature direction, the O-T phase coexistence near the room temperature and relaxation degree increasing, and when x is equal to 0.03, the following optimal electrical properties are realized: the piezoelectric constant d33 is equal to 442 pC/N, and the Curie temperature Tc is 245 DEG C. The method mainly benefits from the fact that the components have O-T coexisting PPB, domain wall movement and electric domain turnover are easier to turn over under an external electric field, the piezoelectric property is enhanced, the piezoelectric dielectric property of the material is optimized, and the industrial preparation method of the leadless piezoelectric ceramic is optimized.
本发明属于无铅压电陶瓷材料及其制备方法技术领域，尤其涉及一种无铅压电陶瓷材料的制备方法，目的就是提供一种经济有效、无铅污染的制备铌酸钾钠(KNN)压电陶瓷的方法。通过固相合成法制备KNN‑xCZ陶瓷，经过预烧、破碎、球磨之后，晶粒尺寸尺寸分布变得均匀，致密度提高，CaZrO的引入使Tc与T低温方向移动，造成在室温附近的O‑T相共存，弛豫程度不断增加，当x=0.03时具有最佳的电学性能:压电常数d=442pC/N，居里温度Tc=245°C，这主要得益于该组分具有O‑T共存的PPB，导致在外电场下畴壁运动与电畴翻转更加容易翻转，压电性能得以增强，本发明优化了材料的压电介电性能，并且优化了无铅压电陶瓷的工业化制备方法。
Preparation method of leadless piezoelectric ceramic material
The invention belongs to the technical field of leadless piezoelectric ceramic materials and preparation methods thereof, and particularly relates to a preparation method of a leadless piezoelectric ceramic material. The invention aims to provide an economical, effective and lead-pollution-free method for preparing potassium-sodium niobate (KNN) piezoelectric ceramic. A KNN-xCZ ceramic is preparedby a solid-phase synthesis process, and is pre-sintered, crushed and ball-milled, so the grain size distribution becomes uniform, and the density is increased; CaZrO3 is introduced to achieve Tc andT0-T movement in the low-temperature direction, the O-T phase coexistence near the room temperature and relaxation degree increasing, and when x is equal to 0.03, the following optimal electrical properties are realized: the piezoelectric constant d33 is equal to 442 pC/N, and the Curie temperature Tc is 245 DEG C. The method mainly benefits from the fact that the components have O-T coexisting PPB, domain wall movement and electric domain turnover are easier to turn over under an external electric field, the piezoelectric property is enhanced, the piezoelectric dielectric property of the material is optimized, and the industrial preparation method of the leadless piezoelectric ceramic is optimized.
本发明属于无铅压电陶瓷材料及其制备方法技术领域，尤其涉及一种无铅压电陶瓷材料的制备方法，目的就是提供一种经济有效、无铅污染的制备铌酸钾钠(KNN)压电陶瓷的方法。通过固相合成法制备KNN‑xCZ陶瓷，经过预烧、破碎、球磨之后，晶粒尺寸尺寸分布变得均匀，致密度提高，CaZrO的引入使Tc与T低温方向移动，造成在室温附近的O‑T相共存，弛豫程度不断增加，当x=0.03时具有最佳的电学性能:压电常数d=442pC/N，居里温度Tc=245°C，这主要得益于该组分具有O‑T共存的PPB，导致在外电场下畴壁运动与电畴翻转更加容易翻转，压电性能得以增强，本发明优化了材料的压电介电性能，并且优化了无铅压电陶瓷的工业化制备方法。
Preparation method of leadless piezoelectric ceramic material
一种无铅压电陶瓷材料的制备方法
LIU YUNYOU (Autor:in) / ZHU KAI (Autor:in)
08.09.2020
Patent
Elektronische Ressource
Chinesisch
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