Lead-free piezoelectric ceramic with perovskite structure
A perovskite structure, lead-free piezoelectric technology, applied in the field of piezoelectric ceramic materials, can solve problems such as no piezoelectric ceramic reports, and achieve the effects of high density, excellent piezoelectric performance, and low dielectric loss coefficient
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Embodiment 1
[0022] Preparation composition is: 0.02(K 1 / 4 Bi 3 / 4 ) (Zn 1 / 4 Ti 3 / 4 )O 3 -0.82 (Na 1 / 2 Bi 1 / 2 )TiO 3 -0.03BaTiO 3 - 0.08(Bi 1 / 2 K 1 / 2 ) TiO 3 -0.05 (Bi 1 / 2 Li 1 / 2 )TiO 3 +0.01La 2 o 3 Perovskite-structure lead-free piezoelectric ceramics.
[0023] The preparation method comprises the following steps:
[0024] 1. With analytically pure Li 2 CO 3 、Na 2 CO 3 、BaCO 3 、K 2 CO 3 , ZnO, Bi 2 o 3 , La 2 o 3 and TiO 2 As raw material, carry out batching according to above-mentioned chemical formula;
[0025] 2. Ball mill with absolute ethanol as the medium for 24 hours, and dry at 80°C; the dried powder is pressed into a large body, put into a high-alumina crucible and covered, and keep warm at 900°C for 4 hours to synthesize a solid solution ;
[0026] 3. After crushing, the synthesized solid solution was ball-milled for 24 hours with absolute ethanol as the medium, dried, and granulated by adding 5% PVA solution
[0027]4. Compressed in a rigid mold ...
Embodiment 2
[0034] Preparation composition is: 0.03(K 1 / 4 Bi 3 / 4 ) (Zn 1 / 4 Ti 3 / 4 )O 3 -0.75 (Na 1 / 2 Bi 1 / 2 )TiO 3 -0.05BaTiO 3 - 0.12(Bi 1 / 2 K 1 / 2 ) TiO 3 -0.05 (Bi 1 / 2 Li 1 / 2 )TiO 3 +0.01Yb 2 o 3 Perovskite-structure lead-free piezoelectric ceramics.
[0035] The preparation method is the same as in Example 1.
[0036] The performance measurements are as follows:
[0037] d 33 (pC / N) Q m k p ε r ρ re (%) tanδ(%) k t 195 92 0.32 1450 96.8 3.21 0.432
Embodiment 3
[0039] Preparation composition is: 0.01(K 1 / 4 Bi 3 / 4 ) (Zn 1 / 4 Ti 3 / 4 )O 3 -0.73 (Na 1 / 2 Bi 1 / 2 )TiO 3 -0.05BaTiO 3 - 0.15(Bi 1 / 2 K 1 / 2 ) TiO 3 -0.06 (Bi 1 / 2 Li 1 / 2 )TiO 3 +0.01 In 2 o 3 Perovskite structure lead-free piezoelectric ceramics.
[0040] The preparation method is the same as in Example 1.
[0041] The performance measurements are as follows:
[0042] d 33 (pC / N) Q m k p ε r ρ re (%) tanδ(%) k t 191 65 0.323 1312 96.2 2.97 0.429
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