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Preparation method of Fe2O3 doped with PHT-PNN piezoelectric ceramic

A piezoelectric ceramic and fe2o3 technology, which is applied in the field of preparation of Fe2O3 doped PHT-PNN piezoelectric ceramics, can solve the problems that the piezoelectric coefficient is difficult to exceed 850pC/N, the sintering conditions are high, and the research on piezoelectric ceramics is still scarce.

Inactive Publication Date: 2017-08-18
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, their preparation process is complicated, the sintering conditions are relatively high, and the piezoelectric coefficient d 33 Difficult to break through 850pC / N
However, studies in recent years have shown that PHT-PNN piezoelectric ceramics have excellent piezoelectric properties, and the piezoelectric coefficient is expected to exceed 900pC / N, but there is still little further research on the piezoelectric ceramics of this system.

Method used

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  • Preparation method of Fe2O3 doped with PHT-PNN piezoelectric ceramic

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Experimental program
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Effect test

Embodiment 1

[0105] According to the molar ratio of 1:2 NiCO 3 -2Ni(OH) 2 -4H 2 O powder and Nb 2 o 5 The powder is mixed to form a mixed powder; the mixed powder and the ball are added to the ball milling tank, and absolute ethanol is added to the ball milling tank as the ball milling medium for ball milling to obtain a uniform mixed powder. Middle: The amount of ball milling medium-absolute ethanol is: 0.6ml of anhydrous ethanol should be added to each gram of the mixed powder to be ball 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. The ball milling time is 10 hours; put the mixed powder in an oven at 80°C for drying treatment to obtain the mixed dry powder; pour the mixed dry powder into the crucible, and compact the mixed dry powder in the crucible, and then Put a lid on the crucible to form a closed space in the crucible, place the crucible in a muffle furnace, and calcinate the mixed dry powder in ...

Embodiment 2

[0112] According to the molar ratio of 1:2.5 NiCO 3 -2Ni(OH) 2 -4H 2 O powder and Nb 2 o 5 The powder is mixed to form a mixed powder; the mixed powder and the ball are added to the ball milling tank, and absolute ethanol is added to the ball milling tank as the ball milling medium for ball milling to obtain a uniform mixed powder. Middle: The amount of ball milling medium-absolute ethanol is: 0.8ml of anhydrous ethanol should be added to each gram of the mixed powder to be ball 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 ball milling time is 11 hours; put the mixed powder in an oven at 85°C for drying treatment to obtain the mixed dry powder; pour the mixed dry powder into the crucible, and compact the mixed dry powder in the crucible, and then Put a lid on the crucible to form a closed space in the crucible, place the crucible in a muffle furnace, and calcinate the mixed dry powder in ...

Embodiment 3

[0119] According to the molar ratio of 1:3 NiCO 3 -2Ni(OH) 2 -4H 2 O powder and Nb 2 o 5 The powder is mixed to form a mixed powder; the mixed powder and the ball are added to the ball milling tank, and absolute ethanol is added to the ball milling tank as the ball milling medium for ball milling to obtain a uniform mixed powder. Middle: The amount of ball milling medium-absolute ethanol is: 0.9ml of anhydrous ethanol should be added to each gram of the mixed powder to be ball 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 ball milling time is 12 hours; put the mixed powder in an oven at 90°C for drying treatment to obtain the mixed dry powder; pour the mixed dry powder into the crucible, and compact the mixed dry powder in the crucible, and then Cover the crucible to form a closed space in the crucible, place the crucible in a muffle furnace, and calcinate the mixed dry powder in the cru...

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Abstract

The invention discloses a preparation method of Fe2O3 doped with PHT-PNN piezoelectric ceramic. The preparation method comprises the following steps: (1) synthetizing prefabricated precursor nickel niobate powder; (2) proportioning according to 0.51Pb (Ti0.7Hf0.3) O3-0.49Pb (Ni1 / 3Nb1 / 3) O3 stoichiometry and doping with 0.4%-1.2% mol of Fe2O3; (3) preparing pre-synthetic powder; (4) granulating and forming embryo; (5) obtaining Fe2O3 doped with PHT-PNN piezoelectric ceramic primary products; (6) polishing, silvering and treating in a polarized mode to obtain the Fe2O3 doped with the PHT-PNN piezoelectric ceramic. The preparation method is simple and can obtain high performance piezoelectric ceramic materials with the piezoelectric coefficient greater than 900 pC / N.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of piezoelectric ceramic materials, and in particular relates to a Fe 2 o 3 A method for preparing doped PHT-PNN piezoelectric ceramics. Background technique [0002] Piezoelectric ceramics is a functional ceramic material that realizes mutual conversion of mechanical energy and electrical energy. It has excellent dielectric, piezoelectric, and ferroelectric properties, and has the advantages of easy preparation, high stability, and long service life. It has been widely used. It is used in high-tech fields such as aviation, aerospace, ships, communications, weapons, and electronics. [0003] The application range of piezoelectric ceramics can be roughly divided into two aspects: piezoelectric vibrator and transducer. The applications of piezoelectric oscillators are mainly oscillators, resonators, filters, mechanical filters, piezoelectric transformers, and delay devices. The appli...

Claims

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Application Information

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IPC IPC(8): C04B35/49C04B35/622C04B35/63
CPCC04B35/49C04B35/622C04B35/6303C04B2235/3232C04B2235/3251C04B2235/3272C04B2235/3279C04B2235/3296C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/94
Inventor 闫养希李智敏刘治宏黄云霞张茂林孙鹏王媛
Owner XIDIAN UNIV
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