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The invention discloses lead-free piezoelectric ceramic for a medical ultrasonic transducer as well as a preparation method and application of the lead-free piezoelectric ceramic, the lead-free piezoelectric ceramic is Bi0.5Na0.5ZrO3 doped K0.5Na0.5NbO3 ceramic, and the mass fraction of Bi0.5Na0.5ZrO3 in the lead-free piezoelectric ceramic is less than or equal to 10%. The preparation method comprises the following steps: weighing the raw materials according to a stoichiometric ratio according to a design formula to obtain a mixture, adding the mixture into an organic solvent to obtain slurry,carrying out ultrasonic irradiation, performing drying and sieving on the slurry to obtain undersize, performing calcining to obtain pre-sintered powder, carrying out ball milling, granulation and compression molding on the pre-sintered powder to obtain a green body, and finally carrying out plasma sintering to obtain lead-free piezoelectric ceramic. According to the preparation method, an ultrasonic irradiation powder treatment technology is combined with a spark plasma sintering technology, and the preparation method has the advantages of being excellent in comprehensive performance, environmentally friendly, high in production efficiency, capable of easily achieving batch production and the like, can well meet commercial requirements and is very suitable for preparing lead-free KNN-based piezoelectric ceramic products.
本发明公开了一种医用超声换能器用无铅压电陶瓷及其制备方法和应用，所述无铅压电陶瓷为Bi0.5Na0.5ZrO3掺杂K0.5Na0.5NbO3陶瓷，其中Bi0.5Na0.5ZrO3在无铅压电陶瓷中的质量分数≤10％。其制备方法为：根据设计配方按化学计量比称量原料，获得混合物，将混合物加入有机溶剂中获得浆液，浆液进行超声辐照、干燥，过筛取筛下物，进行煅烧，获得预烧粉料，预烧粉料经球磨、造粒，压制成型获得坯体，最后进行等离子烧结，即得无铅压电陶瓷。本发明的制备方法采用超声辐照粉体处理技术结合放电等离子烧结技术，具有综合性能优异、绿色环保、生产效率高、易于实现批量化生产等优点，能很好的满足商用需求，很适合于制备无铅KNN基压电陶瓷制品。
The invention discloses lead-free piezoelectric ceramic for a medical ultrasonic transducer as well as a preparation method and application of the lead-free piezoelectric ceramic, the lead-free piezoelectric ceramic is Bi0.5Na0.5ZrO3 doped K0.5Na0.5NbO3 ceramic, and the mass fraction of Bi0.5Na0.5ZrO3 in the lead-free piezoelectric ceramic is less than or equal to 10%. The preparation method comprises the following steps: weighing the raw materials according to a stoichiometric ratio according to a design formula to obtain a mixture, adding the mixture into an organic solvent to obtain slurry,carrying out ultrasonic irradiation, performing drying and sieving on the slurry to obtain undersize, performing calcining to obtain pre-sintered powder, carrying out ball milling, granulation and compression molding on the pre-sintered powder to obtain a green body, and finally carrying out plasma sintering to obtain lead-free piezoelectric ceramic. According to the preparation method, an ultrasonic irradiation powder treatment technology is combined with a spark plasma sintering technology, and the preparation method has the advantages of being excellent in comprehensive performance, environmentally friendly, high in production efficiency, capable of easily achieving batch production and the like, can well meet commercial requirements and is very suitable for preparing lead-free KNN-based piezoelectric ceramic products.
本发明公开了一种医用超声换能器用无铅压电陶瓷及其制备方法和应用，所述无铅压电陶瓷为Bi0.5Na0.5ZrO3掺杂K0.5Na0.5NbO3陶瓷，其中Bi0.5Na0.5ZrO3在无铅压电陶瓷中的质量分数≤10％。其制备方法为：根据设计配方按化学计量比称量原料，获得混合物，将混合物加入有机溶剂中获得浆液，浆液进行超声辐照、干燥，过筛取筛下物，进行煅烧，获得预烧粉料，预烧粉料经球磨、造粒，压制成型获得坯体，最后进行等离子烧结，即得无铅压电陶瓷。本发明的制备方法采用超声辐照粉体处理技术结合放电等离子烧结技术，具有综合性能优异、绿色环保、生产效率高、易于实现批量化生产等优点，能很好的满足商用需求，很适合于制备无铅KNN基压电陶瓷制品。
Lead-free piezoelectric ceramic for medical ultrasonic transducer as well as preparation method and application of lead-free piezoelectric ceramic
一种医用超声换能器用无铅压电陶瓷及其制备方法和应用
2021-03-12
Patent
Electronic Resource
Chinese
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