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Preparation and sintering method of potassium-sodium niobate-based piezoelectric ceramic
The invention discloses a preparation and sintering method of potassium sodium niobate based piezoelectric ceramics. The preparation and sintering method comprises the following steps: preparing raw materials of K2CO3, Na2CO3, Nb2O5, CaCO3, ZrO2, Bi2O3, HfO2 and Li2CO3; carrying out primary ball milling on all the raw materials to obtain ceramic powder, and drying the ceramic powder; carrying out pre-sintering on the dried ceramic powder; carrying out secondary ball milling on the pre-sintered ceramic powder, and drying to obtain pre-sintered ceramic powder; putting the granulated ceramic pre-sintered powder into a graphite mold, and tabletting; the graphite mold is placed in an SPS sintering furnace to be pressurized, heated and formed, and a ceramic block is formed; cooling the graphite mold; the obtained ceramic block is annealed, a carbonized layer generated on the surface in the SPS sintering process is eliminated, and finally the high-density potassium-sodium niobate ceramic is obtained. The invention aims to solve the problems of lead-free ceramic materials, poor compactness of potassium-sodium niobate ceramics and high sintering temperature.
本发明公开一种铌酸钾钠基压电陶瓷制备及烧结方法，包括以下步骤：准备原料K2CO3、Na2CO3、Nb2O5、CaCO3、ZrO2、Bi2O3、HfO2、Li2CO3；将全部原料进行一次球磨得到陶瓷粉体，再将陶瓷粉体烘干；将烘干后的陶瓷粉体进行预烧；将预烧后的陶瓷粉体进行二次球磨，再烘干得到陶瓷预烧粉体；将造粒后的陶瓷预烧粉体装入石墨模具中并压片；将石墨模具放置在SPS烧结炉中进行加压加热成型，形成陶瓷块体；冷却石墨模具；将得到的陶瓷块体退火，消除SPS烧结过程中表面产生的碳化层，最后得到高致密度的铌酸钾钠陶瓷。本发明的目的为针对陶瓷材料要求无铅化，铌酸钾钠陶瓷致密性差，烧结温度高的问题所提出。
Preparation and sintering method of potassium-sodium niobate-based piezoelectric ceramic
The invention discloses a preparation and sintering method of potassium sodium niobate based piezoelectric ceramics. The preparation and sintering method comprises the following steps: preparing raw materials of K2CO3, Na2CO3, Nb2O5, CaCO3, ZrO2, Bi2O3, HfO2 and Li2CO3; carrying out primary ball milling on all the raw materials to obtain ceramic powder, and drying the ceramic powder; carrying out pre-sintering on the dried ceramic powder; carrying out secondary ball milling on the pre-sintered ceramic powder, and drying to obtain pre-sintered ceramic powder; putting the granulated ceramic pre-sintered powder into a graphite mold, and tabletting; the graphite mold is placed in an SPS sintering furnace to be pressurized, heated and formed, and a ceramic block is formed; cooling the graphite mold; the obtained ceramic block is annealed, a carbonized layer generated on the surface in the SPS sintering process is eliminated, and finally the high-density potassium-sodium niobate ceramic is obtained. The invention aims to solve the problems of lead-free ceramic materials, poor compactness of potassium-sodium niobate ceramics and high sintering temperature.
本发明公开一种铌酸钾钠基压电陶瓷制备及烧结方法，包括以下步骤：准备原料K2CO3、Na2CO3、Nb2O5、CaCO3、ZrO2、Bi2O3、HfO2、Li2CO3；将全部原料进行一次球磨得到陶瓷粉体，再将陶瓷粉体烘干；将烘干后的陶瓷粉体进行预烧；将预烧后的陶瓷粉体进行二次球磨，再烘干得到陶瓷预烧粉体；将造粒后的陶瓷预烧粉体装入石墨模具中并压片；将石墨模具放置在SPS烧结炉中进行加压加热成型，形成陶瓷块体；冷却石墨模具；将得到的陶瓷块体退火，消除SPS烧结过程中表面产生的碳化层，最后得到高致密度的铌酸钾钠陶瓷。本发明的目的为针对陶瓷材料要求无铅化，铌酸钾钠陶瓷致密性差，烧结温度高的问题所提出。
Preparation and sintering method of potassium-sodium niobate-based piezoelectric ceramic
一种铌酸钾钠基压电陶瓷制备及烧结方法
ZHANG HAIBO (author) / YOU DI (author) / TAN HUA (author) / HUANG SHUAIKANG (author) / ZHOU XINYI (author) / GAO HUAYUN (author) / REN YONGFEI (author) / WANG CHUANMIN (author) / LUO JIANGMEI (author)
2023-05-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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