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A method for chemically plating amorphous Ni-Fe-P on the surface of hollow microbeads

A technology of hollow microspheres and surface chemistry, which is applied in the field of chemical plating on the surface of hollow microspheres, can solve the problem that electroless plating of ternary alloys is difficult to obtain, and achieve the effect of high requirements, high magnetic permeability, and not easy to deposit

Active Publication Date: 2016-04-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents CN102311233A, CN1792928, CN102010136A, etc. have reported that metals such as Cu, Ni-P, and Ag are coated on the surface of hollow microspheres, but it is still difficult to obtain electroless ternary alloys on the surface of hollow microspheres.

Method used

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  • A method for chemically plating amorphous Ni-Fe-P on the surface of hollow microbeads
  • A method for chemically plating amorphous Ni-Fe-P on the surface of hollow microbeads
  • A method for chemically plating amorphous Ni-Fe-P on the surface of hollow microbeads

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specific Embodiment approach 1

[0020] Specific embodiment one: the method for electroless plating amorphous Ni-Fe-P on the surface of a kind of hollow microsphere of the present embodiment is carried out according to the following steps:

[0021] 1. Cleaning: with NaOH and Na 2 CO 3 Prepare alkaline cleaning solution for raw materials, the concentration of NaOH in the prepared alkaline cleaning solution is 10-30g / L, NaOH 2 CO 3 The concentration is 15-40g / L, the hollow microspheres with a particle size of 1-100μm are added to the above alkaline cleaning solution, and the temperature is 20-40°C for magnetic stirring or mechanical stirring for 20-50min, and the Floating glass beads on the upper layer, and then wash with deionized water or distilled water for 1 to 3 times until the solution is neutral, and finally dry in a drying oven at a temperature of 40 to 70°C for 30 to 70 minutes to obtain hollow microspheres with a clean and rough surface. beads;

[0022] 2. Sensitization: use concentrated HCl with ...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the concentration of NaOH in the alkaline cleaning solution after preparing in the step one is 20g / L, NaOH 2 CO 3 The concentration is 30g / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step one, the temperature is 25°C and the magnetic stirring is cleaned for 30 minutes, and the upper layer of floating glass beads is taken after standing still, and then washed 3 times with distilled water until the solution is obtained. It is neutral, and finally dried in a drying oven at a temperature of 60°C for 40 minutes. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a method for chemically plating a hollow microsphere surface with amorphous Ni-Fe-P, relating to a method for chemically plating the hollow microsphere surface. The method comprises the following steps: I. washing; II sensitizing with SnCl2; III. activating with PdCl2; IV. chemical plating. The hollow microsphere surface can be successfully and completely coated with Ni-Fe-P by adopting the special formula of a plating solution for chemical plating with Ni-Fe-P and a proper pretreatment process, thus obtaining a uniform and continuous coating. The coating comprises nickel, phosphorus and the balance of iron and belongs to low-phosphorus chemical plating, wherein the mass percent of nickel is controllable between 80% and 88%, and the mass percent of phosphorus is controllable between 3% and 6%. The method is applied in the field of hollow microsphere surface chemical plating.

Description

technical field [0001] The invention relates to a method for chemical plating on the surface of hollow microspheres. Background technique [0002] Electromagnetic waves are harmful to human health, cause electromagnetic interference to electronic systems of precision electronic instruments, avionics products, navigation equipment, scientific measurement, medical care and important projects, and are likely to cause leakage of confidential information in military, political and economic aspects. Electromagnetic waves take corresponding shielding and protection measures. [0003] Conductive coatings are an important branch of electromagnetic shielding materials, which can be divided into intrinsic conductive coatings and blended conductive coatings. Among them, the blended conductive coating is currently widely used. It is mainly composed of film-forming substances (resins), solvents, additives, conductive fillers, etc., that is, conductive fillers are mixed into non-conductiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/50C23C18/18
Inventor 张强张孟孟武高辉
Owner HARBIN INST OF TECH