Method for fast preparing PZT piezoceramics through low-temperature fast sintering and piezoceramic
A piezoelectric ceramic, rapid sintering technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of PZT piezoelectric ceramic performance degradation, etc., and achieve the effect of simple preparation process
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Embodiment 1
[0037] First, the PZT ceramic powder (commercially available) was pressed into a green body by dry pressing technology, the pressure was 60MPa, and the holding time was 120s. Put the PZT ceramic green body into the sintering furnace, and connect the green body with the DC high-voltage power supply through platinum wires, such as figure 1 shown. Set the electric field strength to 300-600V / cm, and the limiting current to 100mA, then raise the temperature of the sintering furnace from room temperature to 800°C, and the sintering rate is 10°C / min. and high voltage power supply. After about 2 to 5 hours, the sintered green body was cooled to room temperature with the furnace, and the samples were taken out.
[0038] figure 2 For the SEM photos of the PZT piezoelectric ceramics prepared under the electric field strength of (a) 300V / cm, (b) 400V / cm, (c) 500V / cm, (d) 600V / cm, and the limiting current of 100mA respectively, you can It is evident that the resulting ceramic is fully...
Embodiment 2
[0040] First, the PZT ceramic powder (commercially available) was pressed into a green body by dry pressing technology, the pressure was 60MPa, and the holding time was 120s. Put the PZT ceramic green body into the sintering furnace, and connect the green body with the DC high-voltage power supply through platinum wires, such as figure 1 shown. Set the electric field strength to 500V / cm, and the limiting current to 10mA, 20mA, 30mA, 50mA, then raise the temperature of the sintering furnace from room temperature to 590°C, and the sintering rate is 10°C / min. When the temperature of the sintering furnace reaches 590°C, keep it for 30 minutes , and then turn off the sintering furnace and high voltage power supply. After about 2 to 5 hours, the sintered green body was cooled to room temperature with the furnace, and the samples were taken out.
[0041] image 3 It is the SEM photo of the PZT piezoelectric ceramics prepared under the electric field strength of 500V / cm and the lim...
Embodiment 3
[0043] First, the PZT ceramic powder (commercially available) was pressed into a green body by dry pressing technology, the pressure was 60MPa, and the holding time was 120s. Put the PZT ceramic green body into the sintering furnace, and connect the green body with the DC high-voltage power supply through platinum wires, such as figure 1 shown. Set the electric field strength to 1500V / cm, the limiting current to 100mA, then raise the temperature of the sintering furnace from room temperature to 300°C, and the sintering rate is 10°C / min. power supply. After about 2 to 5 hours, the sintered green body was cooled to room temperature with the furnace, and the samples were taken out.
[0044] Figure 4 It is an SEM photo of the prepared PZT piezoelectric ceramics. It can be clearly seen that the obtained ceramics are almost completely dense, and the average grain size is 450nm.
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