CN1156605C - Method for making light tye composite hollow metal microball - Google Patents
Method for making light tye composite hollow metal microball Download PDFInfo
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- CN1156605C CN1156605C CNB011270748A CN01127074A CN1156605C CN 1156605 C CN1156605 C CN 1156605C CN B011270748 A CNB011270748 A CN B011270748A CN 01127074 A CN01127074 A CN 01127074A CN 1156605 C CN1156605 C CN 1156605C
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Abstract
The present invention relates to a method for preparing light tye composite hollow metal microspheres, which is a preparation method for novel functional materials. The present invention belongs to the technical field of manufacturing electromagnetic-wave absorbing materials. The preparation method comprises the following steps: (1) screening out hollow ceramic microspheres with required grain diameters; (2) carrying out series surface treatment for screened hollow ceramic microspheres so as to reach the purpose of favorable metal binding sites; (3) firstly carrying out sensitizing treatment, and then, carrying out activating treatment so as to an activated initiation layer of which the distribution is uniform on surfaces of the ceramic microspheres; (4) unformly dispersing activated hollow ceramic microspheres in chemical plating liquor by electromagnetic mixing, and carrying out chemical plating coating so as to obtain light weight composite hollow metal microspheres using the hollow ceramic microspheres as a core template.
Description
One, technical field
The present invention is a kind of preparation method of new-type functional material, belongs to the technical field that electromagnetic wave absorbent material is made.
Two, background technology
Along with the fast development of telecommunications industry, unprecedented growth has all appearred in the electromagnetic equipment that is applied to national defence and individual, industry and commercial purpose on value volume and range of product.Electromagnetic radiation becomes current very important big source of pollution.Electromagnetic radiation influences metabolism and brain current in nerve system of human body, and people's the behavior organ that changes and be correlated with is changed, and and then influence the recycle system, immunity and reproduction and the metabolic function of human body, serious even can bring out cancer.Electromagnetic radiation causes interruption, computer and the electronic system malfunction that electric wave transmits to the interference of equipment.
Therefore, the research and development novel wave-absorbing material is the domestic and international focus of research always, no matter is militarily to improve stealthy technique and national defence defence capability, and still reducing hazards of Electromagnetic Radiation aspect civilian all has very positive meaning.
The application type absorbing material is the important research direction of stealth material always, and the direction that forward obtains the microwave absorbing coating of " thin, light, wide, strong " develops.Magnetic metallic powder as iron, cobalt, nickel and powdered alloy thereof, has absorption, sees through and multiple function such as polarization hertzian wave, be develop the earliest, one of most widely used application type absorbing material.But the ratio of metal fine powder is great, and iron is easily oxidized in air, and cobalt, nickel are then more valuable; Although still there are many practical problemss in recently popular nano metal powder excellent performance in a large amount of preparations, preservation, aspect stable.
Three, summary of the invention
But purpose of the present invention just provide a kind of size, composition, with the light tye composite hollow metal microball and the preparation method of electromagnetic property modulation.
The preparation method of light tye composite hollow metal microball of the present invention is:
1. filter out the hollow ceramic microballoon of required particle diameter;
2. the hollow ceramic microballoon that filters out is carried out serial surface treatment, the good metal binding site is arranged to reach;
3. carry out sensitization earlier and handle, carry out activation treatment again, make the ceramic microsphere surface obtain the active trigger layer that one deck is evenly distributed;
4. the hollow ceramic microballoon after the activated processing is dispersed in the chemical plating fluid under induction stirring, and carries out the electroless plating coating, obtaining with the hollow ceramic microballoon is the lightweight tye composite hollow metal microball of kernel templates.
Sensitization is handled and is adopted the tin protochloride colloid, and activation treatment adopts colloidal pd activation solution.Carry out metal that electroless plating coats and be one or more the mixed solution in gold and silver, copper, nickel, the cobalt.In coating, electroless plating, prepares the hollow metal sphere of the function match of multilayer metal compound by repeatedly containing the processing of different metal plating bath.
The invention has the advantages that:
Metallic microspheres is a kernel templates with the hollow ceramic microballoon, adopt wet chemistry to deposit chemical plating method skim metal on the hollow ball surface-coated, prepare novel size, the controlled serial hollow metal complex microsphere (internal aperture and metal layer thickness are all adjustable) of composition, not only reduce the proportion of material greatly, and can carry out modulation to the electromagnetic property of metal, realize function match.
Four, embodiment
The example that is prepared as with hollow nickel metallic microspheres: (1) filters out the hollow ceramic ball of required particle diameter as required; (2) hollow ceramic ball with same particle diameter carries out serial surface treatment, for next step provides the good metal binding site; (3) carry out sensitization with the tin protochloride colloid again and handle, put activation treatment in people's colloidal pd activation solution then, obtain the active trigger layer of the palladium that one deck is evenly distributed on the Ceramic Balls surface; (4) hollow ceramic ball with activated processing passes through the induction stirring dissemination, is dispersed in the chemical nickel-plating solution, and carries out the electroless plating coating under corresponding processing condition, and obtaining with the hollow ceramic ball is the lightweight nickel metallic microspheres of kernel templates; (5) add-on of concrete processing parameter by regulating electroless plating such as plating time, bath concentration, hollow ceramic ball etc., the thickness of metal carbonyl coat is also different, so the metallic microspheres that varies in size of controllability preparation; (6) change the hollow ceramic ball of different-grain diameter, do above-mentioned processing, then can obtain all adjustable hollow nickel Metal Ball of internal orifice dimension and nickel metal layer thickness; (7) composition (reductive agent kind and metal-salt composition) and the processing condition of change solution, obtain the component and the different serial polynary compound hollow metal sphere of content thereof of metal level: a) change the reductive agent kind (as formaldehyde or inferior sodium phosphate or sodium borohydride etc.) in the nickel-plating liquid, can obtain the outer cover metal layer that pure nickel, Ni-P alloy, Ni-B alloy etc. contain different Ni contents; B) composition of main salt metal ion in the change plating bath, as add mantoquita, molysite, cobalt salt etc., can obtain binary (Ni-Cu, Ni-Fe, Ni-Co etc.), multi-element metal (Ni-Cu-Fe, Ni-Fe-Co, Ni-Cu-Co, Ni-Cu-Fe-Co etc.) compound outer shell, each component content can be regulated easily by the adding proportion of each metal ion; C) be under the reductive agent with the inferior sodium phosphate, changing concrete plating technology condition, can make the metal level that contains different Ni-P ratio; (8) will put into another metal plating liquid (as copper, cobalt, silver, gold etc.) through being coated with layer of metal (nickel) compound hollow ball, make with double-level-metal compound hollow ball; So repeatedly, can make the hollow ball of multilayer metal compound, function match; (9) by the test and the simulative optimization of electromagnetic property, the coupling that filters out performance the best is formed.
Claims (4)
1. the preparation method of a light tye composite hollow metal microball is characterized in that the step for preparing is:
1. filter out the hollow ceramic microballoon of required particle diameter;
2. the hollow ceramic microballoon that filters out is carried out serial surface treatment, the good metal binding site is arranged to reach;
3. carry out sensitization earlier and handle, carry out activation treatment again, make the ceramic microsphere surface obtain the active trigger layer that one deck is evenly distributed;
4. the hollow ceramic microballoon after the activated processing is dispersed in the chemical plating fluid under induction stirring, and carries out the electroless plating coating, obtaining with the hollow ceramic microballoon is the lightweight tye composite hollow metal microball of kernel templates.
2. the preparation method of light tye composite hollow metal microball according to claim 1 is characterized in that sensitization processing employing tin protochloride colloid, and activation treatment adopts colloidal pd activation solution.
3. the preparation method of light tye composite hollow metal microball according to claim 1 and 2 is characterized in that carrying out metal that electroless plating coats and is one or more the mixed solution in gold and silver, copper, nickel, the cobalt.
4. the preparation method of light tye composite hollow metal microball according to claim 3 is characterized in that in electroless plating coats preparing the hollow metal sphere of the function match of multilayer metal compound by repeatedly containing the processing of different metal plating bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011270748A CN1156605C (en) | 2001-08-07 | 2001-08-07 | Method for making light tye composite hollow metal microball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011270748A CN1156605C (en) | 2001-08-07 | 2001-08-07 | Method for making light tye composite hollow metal microball |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1333387A CN1333387A (en) | 2002-01-30 |
| CN1156605C true CN1156605C (en) | 2004-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011270748A Expired - Fee Related CN1156605C (en) | 2001-08-07 | 2001-08-07 | Method for making light tye composite hollow metal microball |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716483B (en) * | 2009-11-30 | 2012-07-25 | 中国科学院长春应用化学研究所 | Method for preparing metal-phosphorus alloy hollow microsphere |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012220700A1 (en) * | 2012-11-13 | 2014-05-15 | Wacker Chemie Ag | Filler-containing silicone compositions |
| CN105880633B (en) * | 2016-06-29 | 2018-06-29 | 南京宜洛辞电子科技有限公司 | Silver-nickel packet ball many body system raw powder's production technology |
| CN110205610B (en) * | 2019-07-08 | 2021-02-23 | 中国石油大学(华东) | Method for coating copper-nickel protective layer on surface of hollow microsphere |
| CN113004057A (en) * | 2021-02-09 | 2021-06-22 | 中国科学院福建物质结构研究所 | Core-shell structure conductive microsphere with adjustable specific gravity and preparation method and application thereof |
| CN114535570B (en) * | 2022-02-13 | 2024-03-12 | 西南大学 | Preparation method of hollow bimetallic microsphere and electromagnetic protection composite material |
| CN114307886B (en) * | 2022-02-13 | 2024-03-12 | 西南大学 | Electromagnetic protection composite material based on hollow bimetallic microspheres and preparation method thereof |
| CN116060622A (en) * | 2023-02-09 | 2023-05-05 | 哈尔滨工程大学 | Heat insulation material with hollow shell structure and preparation method thereof |
-
2001
- 2001-08-07 CN CNB011270748A patent/CN1156605C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716483B (en) * | 2009-11-30 | 2012-07-25 | 中国科学院长春应用化学研究所 | Method for preparing metal-phosphorus alloy hollow microsphere |
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| Publication number | Publication date |
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| CN1333387A (en) | 2002-01-30 |
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