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Method for preparing sodium bismuth titanate piezoelectric ceramic from low-granularity powder
The invention discloses a method for preparing a sodium bismuth titanate piezoelectric ceramic from low-granularity powder. The stoichiometric equation of the sodium bismuth titanate piezoelectric ceramic isNa0.5Bi4.5Ti3.95Ta0.025W0.025O15.0375 + 0.1 wt% Sm2O3 + 0.3 wt% Co2O3. A traditional solid-phase reaction method is adopted, ball milling process parameters and a sintering schedule are adjusted, the piezoelectric ceramic with fine and uniform crystal grains is obtained, the sintering temperature is reduced to 1040 DEG C, the dielectric loss tan delta is reduced to 0.25%, the piezoelectric constant d33 is 33.2 pC/N, the Curie temperature Tc is 674 DEG C, and the high-temperature resistivity rho V at 500 DEG C reaches up to 8.95 * 10<7> omega.cm. The piezoelectric ceramic prepared by the invention is mainly applied to vibration state monitoring of high-temperature objects at 500 DEG C and below. The piezoelectric ceramic prepared by adopting a solid-phase reaction method is simple in process, and the cost can be effectively reduced.
本发明公开了一种采用低粒度粉体制备钛酸铋钠压电陶瓷的方法，钛酸铋钠压电陶瓷化学计量式为Na0.5Bi4.5Ti3.95Ta0.025W0.025O15.0375+0.1wt%Sm2O3+0.3wt%Co2O3。采用传统的固相反应法，通过调整球磨工艺参数和烧结制度，获得晶粒细小均匀的压电陶瓷，烧结温度降低到1040℃，介电损耗tanδ降低到0.25%，压电常数d33为33.2pC/N，居里温度Tc为674℃,500℃时高温电阻率ρV高达8.95×107Ω·cm。本发明制备的压电陶瓷主要应用于500℃及以下高温物体的振动状态监测。采用固相反应法制得的压电陶瓷工艺简单，能够有效降低成本。
Method for preparing sodium bismuth titanate piezoelectric ceramic from low-granularity powder
The invention discloses a method for preparing a sodium bismuth titanate piezoelectric ceramic from low-granularity powder. The stoichiometric equation of the sodium bismuth titanate piezoelectric ceramic isNa0.5Bi4.5Ti3.95Ta0.025W0.025O15.0375 + 0.1 wt% Sm2O3 + 0.3 wt% Co2O3. A traditional solid-phase reaction method is adopted, ball milling process parameters and a sintering schedule are adjusted, the piezoelectric ceramic with fine and uniform crystal grains is obtained, the sintering temperature is reduced to 1040 DEG C, the dielectric loss tan delta is reduced to 0.25%, the piezoelectric constant d33 is 33.2 pC/N, the Curie temperature Tc is 674 DEG C, and the high-temperature resistivity rho V at 500 DEG C reaches up to 8.95 * 10<7> omega.cm. The piezoelectric ceramic prepared by the invention is mainly applied to vibration state monitoring of high-temperature objects at 500 DEG C and below. The piezoelectric ceramic prepared by adopting a solid-phase reaction method is simple in process, and the cost can be effectively reduced.
本发明公开了一种采用低粒度粉体制备钛酸铋钠压电陶瓷的方法，钛酸铋钠压电陶瓷化学计量式为Na0.5Bi4.5Ti3.95Ta0.025W0.025O15.0375+0.1wt%Sm2O3+0.3wt%Co2O3。采用传统的固相反应法，通过调整球磨工艺参数和烧结制度，获得晶粒细小均匀的压电陶瓷，烧结温度降低到1040℃，介电损耗tanδ降低到0.25%，压电常数d33为33.2pC/N，居里温度Tc为674℃,500℃时高温电阻率ρV高达8.95×107Ω·cm。本发明制备的压电陶瓷主要应用于500℃及以下高温物体的振动状态监测。采用固相反应法制得的压电陶瓷工艺简单，能够有效降低成本。
Method for preparing sodium bismuth titanate piezoelectric ceramic from low-granularity powder
一种采用低粒度粉体制备钛酸铋钠压电陶瓷的方法
ZHANG FEIYANG (Autor:in) / YAN FENG (Autor:in) / YANG SHENGSHUAI (Autor:in) / ZHANG NAN (Autor:in) / ZHAO BIN (Autor:in) / LOU YUE (Autor:in) / ZHAO CHEN (Autor:in)
21.01.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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