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Preparation method of textured high-curie-point Pr2Ti2O7 ceramic
The invention relates to a preparation method of textured high-curie-point Pr2Ti2O7 ceramic. According to the technical scheme, the two-time plasma activation heat treatment technology is adopted. The method specifically includes the first step of primary plasma activation heat treatment and the second step of secondary plasma activation heat treatment. In the first step, a graphene die is filled with Pr2Ti2O7 raw materials and then moved into a plasma activated sintering furnace to be activated for 10-30 s, then the temperature is increased to 1100-1250 DEG C at the temperature rise speed of 50-100 DEG C/min, the temperature is kept for 1-3 min, pressure of 20-50 MPa is exerted, and a Pr2Ti2O7 ceramic block is obtained after dense sintering; in the second step, the Pr2Ti2O7 ceramic block is put into the center of a graphene die of a larger size and then moved into the plasma activated sintering furnace to be activated for 10-30 s, then the temperature is increased to 1200-1350 DEG C at the temperature rise speed of 50-100 DEG C/min, the temperature is kept for 3-5 min, pressure of 40-80 MPa is exerted, and the textured Pr2Ti2O7 ceramic is obtained after texturing. The defects that the existing texturing technology of hot forging, hot pressing and the like is long in thermal processing cycle, high in sintering temperature, low in production efficiency and the like are effectively overcome; the application requirement of the high-temperature piezoelectric field can be met through the prepared Pr2Ti2O7 ceramic.
Preparation method of textured high-curie-point Pr2Ti2O7 ceramic
The invention relates to a preparation method of textured high-curie-point Pr2Ti2O7 ceramic. According to the technical scheme, the two-time plasma activation heat treatment technology is adopted. The method specifically includes the first step of primary plasma activation heat treatment and the second step of secondary plasma activation heat treatment. In the first step, a graphene die is filled with Pr2Ti2O7 raw materials and then moved into a plasma activated sintering furnace to be activated for 10-30 s, then the temperature is increased to 1100-1250 DEG C at the temperature rise speed of 50-100 DEG C/min, the temperature is kept for 1-3 min, pressure of 20-50 MPa is exerted, and a Pr2Ti2O7 ceramic block is obtained after dense sintering; in the second step, the Pr2Ti2O7 ceramic block is put into the center of a graphene die of a larger size and then moved into the plasma activated sintering furnace to be activated for 10-30 s, then the temperature is increased to 1200-1350 DEG C at the temperature rise speed of 50-100 DEG C/min, the temperature is kept for 3-5 min, pressure of 40-80 MPa is exerted, and the textured Pr2Ti2O7 ceramic is obtained after texturing. The defects that the existing texturing technology of hot forging, hot pressing and the like is long in thermal processing cycle, high in sintering temperature, low in production efficiency and the like are effectively overcome; the application requirement of the high-temperature piezoelectric field can be met through the prepared Pr2Ti2O7 ceramic.
Preparation method of textured high-curie-point Pr2Ti2O7 ceramic
WANG CHUANBIN (author) / GAO XIAOYI (author) / SHEN QIANG (author) / ZHANG LIANMENG (author)
2016-01-06
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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