Method for preparing cement-based piezoelectric composite material surface nickel electrode

A piezoelectric composite material and cement-based technology, applied in the field of non-metallic electroless plating, can solve the problems of strong particle catalytic activity, unsuitable nickel plating, high price, etc., and achieve good corrosion resistance of the coating, fast nickel plating speed, and environmental protection good sex effect

Active Publication Date: 2016-07-27
UNIV OF JINAN
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional electroless nickel plating process for non-metallic materials uses PdCl 2 Acid roughening-acid sensitization-acid activation-nickel plating process, the process is relatively complicated, PdCl 2 Palladium particles are expensive and toxic, and the particles have strong catalytic activity. During the electroless plating process, it is inevitable that palladium particles will fall into the plating solution, which will affect the stability of the plating solution.
In addition, the palladium salt activation method needs to be carried out under acidic conditions, and the acid has a strong corrosive effect on cement, so the palladium salt activation method is not suitable for cement-based piezoelectric composite materials.
[0005] At present, there is no literature report on the method of palladium-salt-free activated electroless nickel plating on the surface of cement-based piezoelectric composite materials. The electroless nickel plating process of sensitization and activation to avoid the erosion of cement-based piezoelectric composites by acidic media is of great significance for the application and development of cement-based piezoelectric composites and the improvement of the electroless nickel plating process

Method used

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  • Method for preparing cement-based piezoelectric composite material surface nickel electrode
  • Method for preparing cement-based piezoelectric composite material surface nickel electrode
  • Method for preparing cement-based piezoelectric composite material surface nickel electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] For above 8×8mm 2 , the surface of the cement-based piezoelectric composite material with a thickness of 2mm is nickel-plated, and the steps are as follows:

[0047] Step 1: Grinding and degreasing the surface of the cement-based piezoelectric composite material to be plated:

[0048] Grind the cement-based piezoelectric composite material to be plated with 600# and 1000# sandpaper in sequence, and then finely polish it with metallographic sandpaper. After ultrasonic cleaning for 10 minutes, immerse it in a degreasing solution containing acetone and ultrasonically clean it for 20 minutes.

[0049] Step 2: Surface roughening of the cement-based piezoelectric composite material to be plated:

[0050] Put the degreased cement-based piezoelectric composite material in the roughening solution for roughening, treat it at 30°C for 30 minutes, and then rinse it with water to remove the roughening solution. The preparation method of the coarsening solution is: mix sodium hydro...

Embodiment 2

[0065] For above 8×8mm 2 , the surface of the cement-based piezoelectric composite material with a thickness of 2mm is nickel-plated, and the steps are as follows:

[0066] Step 1: Same as Example 1.

[0067] Step 2: Same as Example 1.

[0068] Step 3: Reduction treatment of the cement-based piezoelectric composite material substrate to be plated:

[0069] Put the roughened cement-based piezoelectric composite into the reducing solution and soak for 10 min at room temperature.

[0070] Step 4: Activation treatment of the cement-based piezoelectric composite material substrate to be plated:

[0071] The reduced cement-based piezoelectric composite material was taken out and immersed in the activation solution, soaked at 35°C for 10 minutes, so that nickel ions could be reduced to simple nickel and adsorbed on the surface of the substrate, and rinsed with water. The activation solution is an aqueous solution of nickel acetate, and the content of nickel acetate is 25g / L.

[...

Embodiment 3

[0079] For above 8×8mm 2 , the surface of the cement-based piezoelectric composite material with a thickness of 2mm is nickel-plated, and the steps are as follows:

[0080] Step 1: Same as Example 1.

[0081] Step 2: Same as Example 1.

[0082] Step 3: Same as Example 1.

[0083] Step 4: Activation treatment of the cement-based piezoelectric composite material substrate to be plated:

[0084] Take out the reduced cement-based piezoelectric composite material and immerse it in the activation solution, and soak it at 35°C for 10 minutes, so that nickel ions can be reduced to simple nickel and adsorbed on the surface of the substrate, and rinsed with water after activation.

[0085] Step 5: Same as Example 1.

[0086] In the above step 4, the activation solution is an aqueous solution of nickel acetate or nickel sulfate, and the content of nickel acetate or nickel sulfate is 25g / L.

[0087] The coatings obtained by nickel acetate and nickel sulfate have bright and smooth sur...

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Abstract

The invention discloses a method for preparing a cement-based piezoelectric composite material surface nickel electrode. The method comprises the following steps: roughening, reducing, activating, and plating nickel, wherein the step of roughening is implemented in an alkali roughening liquid; a used reduction solution is a methanol or ethanol solution of sodium borohydride; a used activating liquid is an aqueous solution of nickel acetate or nickel sulfate; a nickel plating liquid consists of 18-22g/L of nickel sulfate, 8-16g/L of trisodium citrate, 26-32g/L of sodium hypophosphite, 8-14g/L of sodium acetate and 6-10g/L of borax, and the pH value is 6.5-7.5. The method is applicable to various cement-based piezoelectric composite materials which take piezoelectric ceramic as a functional body and cement and epoxy resin as substrates, the materials are relatively low in cost and relatively good in environmental friendliness, and an obtained plated layer is smooth in surface, uniform and accordant, good in corrosion resistance, good in conductivity and good in weldability, can be solidly combined with the cement-based piezoelectric composite material, and is not easy to drop, good in binding force and very good in application prospect.

Description

technical field [0001] The invention relates to a method for preparing a nickel electrode on the surface of a cement-based piezoelectric composite material, and belongs to the technical field of non-metallic electroless plating. Background technique [0002] Piezoelectric materials are widely used in health monitoring of large-scale civil engineering because of their special electromechanical conversion characteristics. Piezoelectric materials mainly include piezoelectric ceramics and piezoelectric composite materials. The electromechanical coupling effect of piezoelectric ceramics is strong, and the piezoelectric strain constant is high, but the dielectric constant is high, so the piezoelectric voltage constant is generally low. Moreover, they have poor toughness and are prone to brittle cracking, resulting in low reliability and poor durability of devices made from them. Piezoelectric composite material is a new type of piezoelectric material that began to be studied in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/69
CPCC04B41/5144C04B41/69
Inventor 张颖黄世峰徐丽雯渠娇徐东宇程新
Owner UNIV OF JINAN
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