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Preparation method of PHT-PNN piezoceramic material

A technology of piezoelectric ceramics and dry powder materials, applied in the field of preparation of PHT-PNN piezoelectric ceramic materials, can solve problems such as difficult breakthroughs, high requirements for sintering conditions, and complicated preparation processes, and achieve great economic and social benefits.

Active Publication Date: 2017-09-29
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Representative materials include ternary systems PMN-PZT, PZN-PZT, PZN-PNN and PNN-PST, and quaternary systems PSN-PZN-PZT and PZN-PNN-PZT; High, and the piezoelectric constant d 33 Difficult to break through 850pC / N

Method used

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  • Preparation method of PHT-PNN piezoceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Weigh the basic nickel carbonate powder NiCO according to the molar ratio of 1:2.5 3 -2Ni(OH) 2 -4H 2 O and niobium oxide powder Nb 2 o 5 , among them, basic nickel carbonate powder NiCO 3 -2Ni(OH) 2 -4H 2 The purity of O is 99.9%, niobium oxide powder Nb 2 o 5 The purity is 99.9%; the basic nickel carbonate powder NiCO 3 -2Ni(OH) 2 -4H 2 O and niobium oxide powder Nb 2 o 5 Mix them together, then pour them into a planetary ball mill, then add absolute ethanol and balls to the planetary ball mill, and after ball milling, a uniformly mixed powder is obtained. During the ball milling process, the ball milling medium absolute ethanol The dosage is to add 0.6ml of absolute ethanol per gram of the powder to be milled, the grinding balls are zirconia balls with a diameter of 3mm to 5mm, and the mass ratio of balls to materials is 1.5:1, and the milling time is 10h; The mixed powder is placed in an oven with a temperature of 80°C for drying treatment to obtain a m...

Embodiment 2

[0095] Weigh the basic nickel carbonate powder NiCO according to the molar ratio of 1:2.8 3 -2Ni(OH) 2 -4H 2 O and niobium oxide powder Nb 2 o 5 , among them, basic nickel carbonate powder NiCO 3 -2Ni(OH) 2 -4H 2 The purity of O is 99.9%, niobium oxide powder Nb 2 o 5 The purity is 99.9%; the basic nickel carbonate powder NiCO 3 -2Ni(OH) 2 -4H 2 O and niobium oxide powder Nb 2 o 5 Mix them together, then pour them into a planetary ball mill, then add absolute ethanol and balls to the planetary ball mill, and after ball milling, a uniformly mixed powder is obtained. During the ball milling process, the ball milling medium absolute ethanol The dosage is to add 0.8ml of absolute ethanol per gram of powder to be milled; the grinding balls are zirconia balls with a diameter of 3mm to 5mm, and the mass ratio of balls to materials is 2:1; the milling time is 11h; The mixed powder is placed in an oven at a temperature of 85°C for drying treatment to obtain a mixed dry pow...

Embodiment 3

[0102] Weigh the basic nickel carbonate powder NiCO according to the molar ratio of 1:3 3 -2Ni(OH) 2 -4H 2 O and niobium oxide powder Nb 2 o 5 , among them, basic nickel carbonate powder NiCO 3 -2Ni(OH) 2 -4H 2 The purity of O is 99.9%, niobium oxide powder Nb 2 o 5 The purity is 99.9%; the basic nickel carbonate powder NiCO 3 -2Ni(OH) 2 -4H 2 O and niobium oxide powder Nb 2 o 5 Mix them together, then pour them into a planetary ball mill, then add absolute ethanol and balls to the planetary ball mill, and after ball milling, a uniformly mixed powder is obtained. During the ball milling process, the ball milling medium absolute ethanol The dosage is: 1.0ml of absolute ethanol should be added to each gram of powder to be milled; the grinding balls are zirconia balls with a diameter of 3mm to 5mm, and the mass ratio of balls to materials is 2.5:1; the milling time is 12h; The obtained mixed powder is dried in an oven at a temperature of 90°C to obtain a mixed dry po...

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Abstract

The invention discloses a preparation method of a PHT-PNN piezoceramic material. The method comprises the steps of mixing basic nickel carbonate powder and niobium oxide powder, carrying out ball-milling, drying and burning to obtain nickel niobate precursor powder; weighing lead oxide powder, titanium dioxide powder, hafnium oxide powder and nickel niobate powder separately and carrying out ball-milling treatment after mixing all materials to obtain matrix mixed powder; drying, burning and cooling the matrix mixed powder in sequence to obtain hafnium lead titanate-lead nickel niobate powder; mixing the hafnium lead titanate-lead nickel niobate powder and lithium fluoride powder, carrying out ball-milling and drying to obtain pre-synthetic dry powder; adding a PVA solution to the pre-synthetic dry powder, granulating and pressing the obtained granules into a blank body; and carrying out dumping, furnace cooling and high-temperature sintering on the blank body to obtain a PHT-PNN piezoceramic material. According to the preparation method, the lithium fluoride-doped hafnium lead titanate-lead nickel niobate piezoceramic material can be obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of functional ceramic materials, and in particular relates to a preparation method of PHT-PNN piezoelectric ceramic materials. Background technique [0002] Piezoelectric ceramics is a functional material that can convert mechanical energy to electrical energy. Relying on its good mechanical properties and stable piezoelectric properties, it has been widely used in high-tech fields such as aviation, medical treatment, communication and detection. . According to the working principle, the application range of piezoelectric ceramics can be roughly divided into two aspects: piezoelectric vibrator and transducer. Applications in piezoelectric vibrators mainly include oscillators, resonators, filters, piezoelectric transformers, and delay devices, etc.; applications in transducers mainly include underwater acoustic transducers, high-power ultrasonic transducers, and medical transducers. t...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/634C04B35/626
CPCC04B35/01C04B35/6261C04B35/63416C04B2235/3232C04B2235/3244C04B2235/3251C04B2235/3279C04B2235/3296C04B2235/445C04B2235/6562
Inventor 李智敏刘治宏闫养希张东岩张茂林李培咸
Owner XIDIAN UNIV