Preparation method of PZT aerogel/organic polymer multilayer piezoelectric composite coating
An organic polymer, piezoelectric composite technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, material selection for piezoelectric devices or electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices It can solve the problems of difficult processing and molding, high brittleness of PZT piezoelectric gel, poor comprehensive performance, etc., and achieve the effect of cheap and low-cost application.
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Embodiment 1
[0041] Example 1: Preparation of a three-layer PP1|PP2|PP1 coating with a sandwich structure
[0042] Specific steps are as follows:
[0043] Step 1: Anneal the PZT airgel at 700°C for 2 hours in vacuum to crystallize it, and mix 0.140g of the crystallized PZT airgel with 0.070g of PVDF powder under the condition of an air humidity of 23% Perform uniform dry grinding for 40 minutes, and then add 0.18 mL of DMF to wet grind for 10 minutes to obtain PP1 slurry; then apply the PP1 slurry uniformly on a quartz substrate with a side length of 5 cm and activated at 100 ° C for 5 minutes by casting method, Then dry at 80°C to obtain PP1 coating;
[0044]Step 2: Anneal the PZT airgel at 800°C in vacuum to crystallize it. Under the condition of air humidity of 23%, put 0.187g of crystallized PZT airgel and 0.023g of PEO powder in the research After dry grinding in a bowl for 10 minutes, add 0.2 mL of deionized water and wet grind for 30 minutes to obtain PP2 slurry; then apply the PP...
Embodiment 2
[0050] Example 2: Preparation of five layers of PP1|PP2|PP1|PP2|PP1 coatings
[0051] The preparation steps of this example are basically the same as those of Example 1, except that after Step 4 is completed in Example 1, the PP2 slurry is coated on PP1|PP2|PP1 in the same way as Step 2, and then the same as described in Step 2. After drying under the same conditions as described in Step 3 and Step 4 of Example 1, 5 layers of PP1|PP2|PP1|PP2|PP1 coatings were prepared. Its cross-sectional SEM image is as follows image 3 shown.
Embodiment 3
[0052] Example 3: Preparation of seven layers of PP1|PP2|PP1|PP2|PP1|PP2|PP1 coatings
[0053] The preparation steps of this example are basically the same as those of Example 2, except that after 5 layers of film are produced, the sixth and seventh layers of coatings are prepared with the same conditions and methods as described in Example 2. Cross-section SEM picture as Figure 4 shown.
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