Leadless piezoelectric ceramic material with low conductivity and large strain and preparation method thereof
A ceramic material and lead-free piezoelectric technology, applied in the field of tungsten-doped bismuth ferrite barium titanate ceramic material and its preparation, lead-free piezoelectric ceramic material and its preparation field, can solve the problems of ferroelectricity disappearance and electro-induced strain Value reduction and other issues, to achieve the effect of large conductance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0040] The preparation composition is (Bi 0.67 Ba 0.33 )(Fe 0.67-x W x Ti 0.33 )O 3+δ , wherein, the lead-free piezoelectric ceramic material with low conductance and large strain of x=0.005, the preparation method is as follows:
[0041] To analyze pure Bi 2 o 3 、BaCO 3 , Fe 2 o 3 、TiO 2 , and WO 3 As a raw material, according to the chemical formula (Bi 0.67 Ba 0.33 )(Fe 0.665 W 0.005 Ti 0.33 )O 3+δ Raw materials are weighed in the proportion of each element. Deionized water and agate balls are used as the medium, mixed according to the ratio of raw materials: agate balls: deionized water = 1:1.5:1.2, and wet ball milled for 12 hours. After drying, the raw material powder is compacted, heated to 800°C at a rate of 2°C / min and held for 5 hours to synthesize, and then cooled to room temperature with the furnace; the synthesized green body is crushed, and dried after 24 hours of ball milling , add 5.5wt% polyvinyl alcohol (PVA) to granulate, mix evenly and pa...
Embodiment 2
[0044] The preparation composition is (Bi 0.67 Ba 0.33 )(Fe 0.67-x W x Ti 0.33 )O 3+δ , wherein, x=0.01 lead-free piezoelectric ceramic material with low conductance and large strain, its preparation method is the same as that of Example 1.
[0045] The hysteresis loop of the lead-free piezoelectric ceramics prepared in Example 2 is as follows figure 1 As shown, the remanent polarization strength of ceramics after quenching is changed from 4.6μC / cm 2 Increased to 22.0μC / cm 2 , the ferroelectric performance is significantly improved. The unipolar strain curve of the lead-free piezoelectric ceramics prepared in Example 2 is as follows figure 2 As shown, the ceramic unipolar strain after quenching treatment is increased from 0.065% to 0.250%, and the unipolar strain is increased by 47%. The graph of conductance versus temperature and the value of unipolar electro-induced strain are shown as image 3 with 4 shown. The prepared piezoelectric ceramics have a conductance...
Embodiment 3
[0047] The preparation composition is (Bi 0.67 Ba 0.33 )(Fe 0.67-x W x Ti 0.33 )O 3+δ , wherein, x=0.02 lead-free piezoelectric ceramic material with low conductance and large strain, its preparation method is the same as that in Example 1.
[0048] The conductance of the prepared lead-free piezoelectric ceramics varies with temperature and the value of unipolar electric strain is as follows: image 3 with 4 shown. The prepared piezoelectric ceramics have a conductance of 1.3×10 at 300°C -6 Scm -1 , the unipolar strain is 0.19%, and undoped and unquenched (Bi 0.67 Ba 0.33 )(Fe 0.67 Ti 0.33 )O 3 Compared with piezoelectric ceramic materials, the conductance is reduced by more than one order of magnitude, the unipolar strain is increased by 12%, and the comprehensive performance is significantly improved.
PUM
| Property | Measurement | Unit |
|---|---|---|
| Curie point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More