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Potassium sodium niobate-lithium niobate piezoelectric crystal and preparation method thereof
The invention discloses a KNN-LN piezoelectric crystal and a preparation method thereof. The preparation method comprises the following steps of: S1, weighing Na2CO3, K2CO3, Nb2O5, Li2CO3, Ho2O3 and Tm2O3 according to a preset molar ratio; S2, adding absolute ethyl alcohol into the weighed raw materials for ball milling, and drying ground slurry; S3, placing the dried material powder in a high-temperature box-type furnace so as to pre-sintering the powder; S4, adding an aqueous solution of polyvinyl alcohol into the pre-sintered powder, performing grinding and sieving to obtain powder; and S5, putting the prepared powder into a mold, pressurizing to prepare a tablet, putting the tablet into a high-temperature furnace, sintering the tablet, performing cooling, and taking out the product to prepare the KNN-LN piezoelectric crystal. The piezoelectric property is greatly improved. The prepared KNN-LN piezoelectric crystal has better electrical properties than the corresponding piezo-electric crystal, and can realize lead-free development.
本发明公开了一种KNN‑LN压电晶体及其制备方法，其中，制备方法中包括：S1按照预设摩尔比称取Na2CO3、K2CO3、Nb2O5、Li2CO3、Ho2O3和Tm2O3；S2往称取的原料中加入无水乙醇进行球磨，并将研磨后的浆料干燥；S3将干燥后的料粉置于高温箱式炉中预烧；S4往预烧完成的粉末中加入聚乙烯醇的水溶液进行研磨并过筛，得到粉末；S5将制备得到的粉末置于模具中加压制成压片，并将压片放入高温炉中烧结，冷却后取出，制备得到KNN‑LN压电晶体。大大提升了压电性能。其制备得到的KNN‑LN压电晶体，各项电性能都优于对应的压电晶体，且能实现无铅化发展。
Potassium sodium niobate-lithium niobate piezoelectric crystal and preparation method thereof
The invention discloses a KNN-LN piezoelectric crystal and a preparation method thereof. The preparation method comprises the following steps of: S1, weighing Na2CO3, K2CO3, Nb2O5, Li2CO3, Ho2O3 and Tm2O3 according to a preset molar ratio; S2, adding absolute ethyl alcohol into the weighed raw materials for ball milling, and drying ground slurry; S3, placing the dried material powder in a high-temperature box-type furnace so as to pre-sintering the powder; S4, adding an aqueous solution of polyvinyl alcohol into the pre-sintered powder, performing grinding and sieving to obtain powder; and S5, putting the prepared powder into a mold, pressurizing to prepare a tablet, putting the tablet into a high-temperature furnace, sintering the tablet, performing cooling, and taking out the product to prepare the KNN-LN piezoelectric crystal. The piezoelectric property is greatly improved. The prepared KNN-LN piezoelectric crystal has better electrical properties than the corresponding piezo-electric crystal, and can realize lead-free development.
本发明公开了一种KNN‑LN压电晶体及其制备方法，其中，制备方法中包括：S1按照预设摩尔比称取Na2CO3、K2CO3、Nb2O5、Li2CO3、Ho2O3和Tm2O3；S2往称取的原料中加入无水乙醇进行球磨，并将研磨后的浆料干燥；S3将干燥后的料粉置于高温箱式炉中预烧；S4往预烧完成的粉末中加入聚乙烯醇的水溶液进行研磨并过筛，得到粉末；S5将制备得到的粉末置于模具中加压制成压片，并将压片放入高温炉中烧结，冷却后取出，制备得到KNN‑LN压电晶体。大大提升了压电性能。其制备得到的KNN‑LN压电晶体，各项电性能都优于对应的压电晶体，且能实现无铅化发展。
Potassium sodium niobate-lithium niobate piezoelectric crystal and preparation method thereof
一种铌酸钠钾-铌酸锂压电晶体及其制备方法
HUANG XIAO (author) / HUANG SHENGYANG (author) / MIAO GENXUE (author) / ZHANG SHAOHUA (author)
2021-07-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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