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Sodium bismuth titanate-based lead-containing ferroelectric ceramic material with wide temperature stabilized electrostrictive strain, preparation method and applications thereof

A sodium bismuth titanate-based, electro-straining technology is applied in the field of electronic ceramic materials, which can solve the problems of electric field-induced polarization drop, limiting the strain performance of sodium bismuth titanate-based ferroelectric ceramics, and disruption, and achieves good repeatability. , easy to operate, the effect of great economic value

Inactive Publication Date: 2019-10-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such a solid solution, because the long-range order of the polarization is disrupted, the electric field-induced polarization of the solid solution decreases rapidly, which greatly limits the strain performance of bismuth sodium titanate-based ferroelectric ceramics.

Method used

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  • Sodium bismuth titanate-based lead-containing ferroelectric ceramic material with wide temperature stabilized electrostrictive strain, preparation method and applications thereof
  • Sodium bismuth titanate-based lead-containing ferroelectric ceramic material with wide temperature stabilized electrostrictive strain, preparation method and applications thereof
  • Sodium bismuth titanate-based lead-containing ferroelectric ceramic material with wide temperature stabilized electrostrictive strain, preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0027] A bismuth sodium titanate ferroelectric ceramic material with stable electric strain over a wide temperature range has the following chemical composition:

[0028] 0.68Bi 1 / 2 Na 1 / 2 TiO 3 -0.32PbMg 1 / 3 Nb 2 / 3 o 3 , abbreviated as BNT-0.32PMN, the sintering temperature is 1150°C, recorded as sample 1, marked as #1.

[0029] Sample 1 was prepared as follows:

[0030] 1) According to the chemical expression 0.68Bi 1 / 2 Na 1 / 2 TiO 3 -0.32PbMg 1 / 3 Nb 2 / 3 o 3 Weigh Bi 2 o 3 , Na 2 CO 3 ,TiO 2 , PbO and MgNb 2 o 6 . Mix the weighed raw materials and put them into a ball mill jar, add the ball milling solvent isopropanol and zirconia balls, mill for 12 hours, and the ball milling speed is 250 rpm, then put the mixture in an oven for drying at 80°C, put Grind in a mortar and pass through an 80-mesh sieve; pre-fire in a muffle furnace at 800 ° C for 2 hours, cool to room temperature naturally, and take out the furnace; ball mill again to synthesize BNT-xPMN.

...

Embodiment 2

[0036] A bismuth sodium titanate ferroelectric ceramic material with stable electric strain over a wide temperature range has the following chemical composition:

[0037] 0.64 Bi 1 / 2 Na 1 / 2 TiO 3 -0.36PbMg 1 / 3 Nb 2 / 3 o 3 , abbreviated as BNT-0.36SBT, the sintering temperature is 1150°C, recorded as sample 2, marked as #2.

[0038] Sample 2 was prepared as follows:

[0039] 1) According to the chemical expression 0.64Bi 1 / 2 Na 1 / 2 TiO 3 -0.36PbMg 1 / 3 Nb 2 / 3 o 3 Weigh Bi 2 o 3 , Na 2 CO 3 ,TiO 2 , PbO and MgNb 2 o 6 . Mix the weighed raw materials and put them into a ball mill jar, add the ball milling solvent isopropanol and zirconia balls, mill for 12 hours, and the ball milling speed is 250 rpm, then put the mixture in an oven for drying at 80°C, put Grind in a mortar and pass through an 80-mesh sieve; pre-fire in a muffle furnace at 800 ° C for 2 hours, cool to room temperature naturally, and take out the furnace; ball mill again to synthesize BNT-xPMN.

...

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Abstract

The invention discloses a sodium bismuth titanate-based lead-containing ferroelectric ceramic material with wide temperature stabilized electrostrictive strain, a preparation method and applications thereof, and belongs to the technical field of electronic ceramic materials, wherein the chemical composition of the ceramic material is (1-x)Bi1 / 2Na1 / 2TiO3-xPbMg1 / 3Nb2 / 3O3, and x is 0.32-0.36. According to the present invention, the material system can be synthesized at a low temperature by using a solid phase reaction method to obtain electrostrictive strain with high density and wide temperaturestability; at a temperature of 30-120 DEG C, under the action of an electric field of 60 kV / cm, the maximum value of the low-hysteresis electrostrictive strain is 0.06-0.08%, and the change rate is less than 30%; the method has characteristics of simple components, simple process steps, easy operation and good repeatability; and the product can be used in high precision drivers with high temperature stability requirements, and has great economic value.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramic materials, and in particular relates to a bismuth sodium titanate-based lead-containing ferroelectric ceramic material with stable electric strain over a wide temperature range and a preparation method and application thereof. Background technique [0002] In high-precision micro-area drivers, the electric strain with small hysteresis is often obtained by applying an electric field to the ferroelectric material. The strain accuracy can be controlled in tens to hundreds of nanometers, which is of great value in high-precision instruments. . However, conventional ferroelectric ceramics will produce a large hysteresis under the action of a large-signal driving electric field, and this hysteresis will have a great impact on the driver of ferroelectric ceramic materials. Therefore, how to minimize the influence of hysteresis on strain characteristics is a key point in the research of electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622
CPCC04B35/475C04B35/622C04B2235/3201C04B2235/3206C04B2235/3234C04B2235/3255C04B2235/3296C04B2235/656C04B2235/6567C04B2235/96
Inventor 靳立庞静徐卓魏晓勇
Owner XI AN JIAOTONG UNIV
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