Electrostriction material and preparation method thereof

A technology of electrostrictive materials and raw materials, applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of poor pressure resistance, high manufacturing cost, high loss, etc., and achieve voltage resistance The effect of high performance, low cost and low loss

Inactive Publication Date: 2009-06-10
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of poor voltage resistance, high loss and high manufacturing cost of existing electrostrictive materials, provide an electrostrictive material with good voltage

Method used

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  • Electrostriction material and preparation method thereof
  • Electrostriction material and preparation method thereof
  • Electrostriction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) With chemically pure PbO, TiO 2 , Mg(OH) 2 , Nb 2 o 5 , SrCO 3 、Sc 2 o 3 、Cr 2 o 3 As raw material, according to the composition formula Pb 0.95 Sr 0.05 (Mg 1 / 3 Nb 2 / 3 ) 0.1 Ti 0.9 o 3 +0.01mol%Sc 2 o 3 +0.02mol% Cr 2 o 3 The stoichiometric ratio is accurately weighed;

[0030] 2) First with Mg(OH) 2 and Nb 2 o 5 As a raw material, MgNb is first synthesized by incubating at 800-1000°C for 2.5 hours 2 o 6 , and then with PbO, TiO 2 , SrCO 3 、Sc 2 o 3 、Cr 2 o 3 Carry out mixing and ball milling according to the corresponding proportion, and heat preservation at 800-1000°C for 2.5 hours to synthesize lead magnesium niobate powder for the second time;

[0031] 3) After the secondary synthetic lead magnesium niobate powder obtained in step 2) is ball-milled into micron again, 0.5wt% polyvinyl alcohol is added as a binder to granulate and shape, and then keep warm at 1100-1250°C for 2 hours. Sintering to obtain electrostrictive materials.

[...

Embodiment 2

[0037] 1) With chemically pure PbO, TiO 2 , Mg(OH) 2 , Nb 2 o 5 , La 2 o 3 、Sc 2 o 3 、 Bi 2 o 3 As raw material, according to the composition formula Pb 0.98 La 0.02 (Mg 1 / 3 Nb2 / 3 ) 0.05 Ti 0.95 o 3 +0.3mol%Sc 2 o 3 +0.1mol% Bi 2 o 3 The stoichiometric ratio weighing;

[0038] 2) First with Mg(OH) 2 and Nb 2 o 5 As a raw material, MgNb was first synthesized by incubating at 850°C for 1.5 hours 2 o 6 , and then with PbO, TiO 2 , La 2 o 3 、Sc 2 o 3 、 Bi 2 o 3 Carry out mixing ball milling according to the corresponding proportion, and heat preservation at 850°C for 1.5 hours to synthesize lead magnesium niobate powder for the second time;

[0039] 3) After the secondary synthetic lead magnesium niobate powder obtained in step 2) is ball-milled into micron again, 0.5wt% polyvinyl alcohol is added as a binder to granulate, and then sintered at 1200° C. for 2 hours. Thus an electrostrictive material is obtained.

[0040] Then, the same processing tec...

Embodiment 3

[0042] 1) With chemically pure PbO, TiO 2 , Mg(OH) 2 , Nb 2 o 5 、Sc 2 o 3 、Cr 2 o 3 As raw material, according to the composition formula Pb(Mg 1 / 3 Nb 2 / 3 ) 0.15 Ti 0.85 o 3 +0.02mol% Sc 2 o 3 +0.48mol%Cr 2 o 3 The stoichiometric ratio weighing;

[0043] 2) First with Mg(OH) 2 and Nb 2 o 5 As a raw material, MgNb was first synthesized by incubating at 1000°C for 1 hour 2 o 6 , and then with PbO, TiO 2 、Sc 2 o 3 、Cr 2 o 3 Carry out mixing ball milling according to the corresponding proportion, and heat preservation at 1000°C for 1 hour to synthesize lead magnesium niobate powder for the second time;

[0044] 3) After the secondary synthetic lead magnesium niobate powder obtained in step 2) is ball-milled into micron again, 0.5wt% polyvinyl alcohol is added as a binder to granulate, and then sintered at 1250°C for 1 hour. Thus an electrostrictive material is obtained.

[0045] Then, the same processing technology as in Example 1 was adopted for the pre...

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Abstract

The invention provides an electrostriction material and a preparation method thereof. The invention provides the electrostriction material having the advantages of good pressure resistant performance, large deformation and low consumption by using Sr element or La element to partially replace Pb in PMN and simultaneously doping Sc2O3 and adding Cr2O3 or Bi2O3, and using a low-cost production line and optimized technological conditions. The electrostriction material can be widely applied in the fields of aerospace, precision optics, precision finishing and so on with large-deformation driving and positioning.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to an electrostrictive material and a preparation method thereof. Background technique [0002] Electrostrictive material is a kind of ferroelectric material with electromechanical coupling effect, which will produce certain deformation under the induction of external electric field. Because the mechanism of the deformation is to generate the required motion through the electrical input signal rather than the mechanical input, it can achieve mechanical isolation, and because of its small driving power and no need for high-voltage prepolarization, there is no polarization and depolarization. Aging problems, so electrostrictive materials become ideal materials for micro-displacement devices, and are highly valued by national defense, microelectronics industry and cutting-edge technology. Optical systems and other aspects have a wide range of applications. [0003] The deformation...

Claims

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Application Information

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IPC IPC(8): C04B35/472C04B35/622H01L41/187
Inventor 温建强蔡海荣
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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