Potassium-sodium niobate-based ceramic as well as preparation method and application thereof

• Main Authors: ZHANG SHUGUANG, LIAO ZHONGXIN, LI BOSEN, GAO DAQIANG
• Format: Patent
• Language: Chinese; English
• Published: 25.04.2023
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to the technical field of ceramic preparation, in particular to potassium-sodium niobate-based ceramic as well as a preparation method and application thereof. The problems that in the prior art, cracks are prone to occurring in the preparation process of the potassium sodium niobate-based piezoelectric ceramic, and the temperature stability of the finally obtained potassium sodium niobate-based piezoelectric ceramic is poor are solved. The invention relates to a preparation method of potassium-sodium niobate-based ceramic, an orthorhombic phase and a tetragonal phase coexist in the potassium-sodium niobate-based ceramic, and the method comprises the following steps: mixing reaction raw materials according to the chemical formula ratio of the potassium-sodium niobate-based ceramic, and carrying out ball milling and sintering to prepare ceramic powder; preparing the ceramic powder into a ceramic green body; heating the ceramic green body to a first temperature at a rate of 10-20 DEG C/min