CN102690468A - Thin radio noise suppression material and preparation method thereof - Google Patents
Thin radio noise suppression material and preparation method thereof Download PDFInfo
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- CN102690468A CN102690468A CN2012101605712A CN201210160571A CN102690468A CN 102690468 A CN102690468 A CN 102690468A CN 2012101605712 A CN2012101605712 A CN 2012101605712A CN 201210160571 A CN201210160571 A CN 201210160571A CN 102690468 A CN102690468 A CN 102690468A
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Abstract
The invention discloses a thin radio noise suppression material and a preparation method thereof, and relates to the field of wave absorbing materials for electromagnetic wave radiation protection. The preparation method includes the steps: using iron, silicon, chromium and aluminum as raw materials according to the mass ratio of (85-90): (5-10): (0-9): (0-9) to form an iron-base alloy material, and subjecting the iron-base alloy material to ball milling sheeting treatment; and mixing the iron-base alloy material subjected to ball milling sheeting treatment and butyl rubber according to the mass ratio of (8-9): (2-1), and subjecting the mixture to plastic mixing and rolling forming to obtain the thin radio noise suppression material sheets. The reflection loss of the thin radio noise suppression material in a frequency range of 0.8GHz-10GHz is larger than -5db, electromagnetic radiation interference can be effectively suppressed; the thin radio noise suppression material has high impedance and can be applied to highly-integrated electronic PCB (printed circuit board) systems to meet the current electronic product development requirement; and the thin radio noise suppression material is easy to cut, applicable to complex surface radio noise suppression and wide in application range.
Description
Technical field
The present invention relates to the absorbing material field of electromagenetic wave radiation protection, particularly relate to a kind of slim radio noise and suppress material and preparation method thereof.
Background technology
Along with the employed band limits of computer, communication, information technoloy equipment and digital product constantly enlarges, and the developing direction of electronic product trend high band, electronic product ubiquity Electromagnetic Interference.Along with the raising of environmental requirement, many ordinary electronic products have also proposed new requirement to the EMI of product simultaneously.EMI can occur in any position of electronic product, and consequently the quality factor of electronic product descends, even influences its normal serviceability, and can not exceed the time limit.
Present popular EMI (Electromagnetic interference; EMI) solution is to use the conductive shield material to solve the RFI problem of electronic product; Yet the conductive shield material can bring electromagnetic self-reflection interference problem, and the coupling that perhaps produces because of reflection interference causes its adjacent susceptible device susceptor to be disturbed.Particularly, can produce complicated cross-talk problem, only depend on shielding and grounding technology to be difficult to be solved because work long hours in EMI at highly integrated electronics PCB (Printed Circuit Board, printed substrate) board level system.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of above-mentioned background technology; Provide a kind of slim radio noise to suppress material and preparation method thereof; Reflection loss in 0.8GHz～10GHz frequency range can effectively suppress the electromagnetic interference that the ultra-thin development of present electronic product brings greater than-5db; Have high resistance, can be applied to the system of highly integrated electronics pcb board level, satisfied the demand for development of current electronic product; Be easy to cut, can be applicable to that the radio noise of complex surface suppresses, have wide range of applications.
Slim radio noise provided by the invention suppresses preparation methods; May further comprise the steps: A, with mass ratio for (85～90): (5～10): (0～9): the iron of (0～9), silicon, chromium, aluminium are raw material; Be combined to form ferrous alloy material, and carry out the processing of ball milling sheet; B, with the ferrous alloy material after the processing of ball milling sheet and butyl rubber by mass ratio (8～9): mix (2～1), after moulding mixing and calendering formation, forms slim radio frequency and suppress material sheet.
In technique scheme, the mass ratio of iron described in the steps A, silicon, aluminium is 88.5: 7.5: 4.5.
In technique scheme, the mass ratio of iron described in the steps A, silicon, chromium is 85: 10: 5.
In technique scheme, the mass ratio of iron described in the steps A, silicon, chromium, aluminium is 88: 5: 4: 3.
In technique scheme, in the steps A with zirconia ball and ferrous alloy material by 12: 1 ball-to-powder weight ratio ball milling 20 hours, carry out the processing of ball milling sheet.
In technique scheme, it is following to mould mixing process among the step B: behind ferrous alloy material and elastomeric material proportional mixing after the processing of ball milling sheet, in mill, roll 1 hour after, be prepared into the thick sheet material of 1mm.
In technique scheme, saidly mould that the mass ratio of ferrous alloy material and butyl rubber is 8.5: 1.5 in the mixing process.
In technique scheme, the process of calendering formation is following among the step B: the sheet material that said 1mm is thick imports accurate tri-roll press machine, and when roller temperature control during at 60 ℃, the sheet material slice of rolling into the following thickness of 0.3mm is through rolling after cooling.
Slim radio noise provided by the invention suppresses material, adopts method for preparing to form.
In technique scheme, said slim radio noise suppresses the thickness of material less than 0.3mm, and the reflection loss in 0.8GHz～10GHz frequency range is greater than-5db.
Compared with prior art, advantage of the present invention is following:
When (1) slim radio noise inhibition material of the present invention uses in narrow space; Hertzian wave to 0.8GHz～10GHz microwave low-frequency range has good squelch performance; It is absorbing material with higher magnetic permcability loss; When electromagenetic wave radiation is to this material; With arc method measurement the reflection loss greater than-5db (decibel) is arranged, can be used for mobile phone, computer, digital camera, pick up camera, TV etc., can effectively suppress the electromagnetic interference that the ultra-thin development of present electronic product brings.
(2) slim radio noise inhibition material of the present invention has high resistance, can be applied to the system of highly integrated electronics pcb board level, has satisfied the demand for development of current electronic product.
(3) slim radio noise inhibition material of the present invention is easy to cut, and can be applicable to that the radio noise of complex surface suppresses, and has wide range of applications.
(4) radio noise inhibition material of the present invention is the slim continuous sheet of a kind of thickness less than 0.3mm; Be to have the ferrous alloy material of high magnetic permeability loss and the compsn that the polymer rubber base material mixes; Need not pass through sulfidation, and have splendid snappiness.
Embodiment
Below in conjunction with specific embodiment the present invention is made further detailed description.
The slim radio noise that the embodiment of the invention provides suppresses the method for manufacture of material; May further comprise the steps: be (85～90) with mass ratio: (5～10): (0～9): the iron of (0～9), silicon, chromium, aluminium are raw material; Be combined to form ferrous alloy material; Zirconia ball and ferrous alloy material by 12: 1 ball-to-powder weight ratio ball milling 20 hours, are carried out the processing of ball milling sheet; With the ferrous alloy material after the processing of ball milling sheet and butyl rubber by mass ratio (8～9): mix (2～1); Mould mixing processing: behind ferrous alloy material and elastomeric material proportional mixing after the processing of ball milling sheet; After in mill, rolling 1 hour, be prepared into the thick sheet material of 1mm; Carrying out calendering formation again handles: the sheet material that 1mm is thick imports accurate tri-roll press machine, and when roller temperature control during at 60 ℃, the sheet material slice of rolling into following the thickness of 0.3mm through rolling after cooling, forms slim radio frequency inhibition material sheet.
Describe through 6 specific embodiments below.
Embodiment 1: select alloy material Fe
88Si
7.5Al
4.5Prepare the thick flexible sheet material of 0.3mm according to above-mentioned method of manufacture.
With mass ratio is that 88: 7.5: 4.5 iron, silicon, aluminium is raw material, is combined to form ferrous alloy material, and zirconia ball and ferrous alloy material by 12: 1 ball-to-powder weight ratio ball milling 20 hours, are carried out the processing of ball milling sheet; Ferrous alloy material after the processing of ball milling sheet and butyl rubber are pressed mass ratio mixing in 9: 1; Wherein the ferrous alloy material massfraction is 90%; The massfraction of butyl rubber and Synergist S-421 95 is 10%; Mould mixing processing: behind ferrous alloy material and elastomeric material proportional mixing after the processing of ball milling sheet, in mill, roll 1 hour after, be prepared into the thick sheet material of 1mm; Carrying out calendering formation again handles: the sheet material that 1mm is thick imports accurate tri-roll press machine, and when roller temperature control during at 60 ℃, the sheet material slice of rolling into following the thickness of 0.3mm through rolling after cooling, forms slim radio frequency inhibition material sheet.
Embodiment 2: select alloy material Fe
85Si
10Cr
5Prepare the thick flexible sheet material of 0.3mm according to the method described above.
With mass ratio is that 85: 10: 5 iron, silicon, chromium is raw material, is combined to form ferrous alloy material, and zirconia ball and ferrous alloy material by 12: 1 ball-to-powder weight ratio ball milling 20 hours, are carried out the processing of ball milling sheet; Ferrous alloy material after the processing of ball milling sheet and butyl rubber are pressed mass ratio mixing in 8: 2; Wherein the ferrous alloy material massfraction is 80%; The massfraction of butyl rubber and Synergist S-421 95 is 20%; Mould mixing processing: behind ferrous alloy material and elastomeric material proportional mixing after the processing of ball milling sheet, in mill, roll 1 hour after, be prepared into the thick sheet material of 1mm; Carrying out calendering formation again handles: the sheet material that 1mm is thick imports accurate tri-roll press machine, and when roller temperature control during at 60 ℃, the sheet material slice of rolling into following the thickness of 0.3mm through rolling after cooling, forms slim radio frequency inhibition material sheet.
Embodiment 3: select alloy material Fe
88Si
5Al
3Cr
4Prepare the thick flexible sheet material of 0.3mm according to the method described above.
With mass ratio is 88: 5: 4: 3 iron, silicon, chromium, aluminium are raw material, are combined to form ferrous alloy material, and zirconia ball and ferrous alloy material by 12: 1 ball-to-powder weight ratio ball milling 20 hours, are carried out the processing of ball milling sheet; Ferrous alloy material after the processing of ball milling sheet and butyl rubber are pressed mass ratio mixing in 8.5: 1.5; Wherein the ferrous alloy material massfraction is 85%; The massfraction of butyl rubber and Synergist S-421 95 is 15%; Mould mixing processing: behind ferrous alloy material and elastomeric material proportional mixing after the processing of ball milling sheet, in mill, roll 1 hour after, be prepared into the thick sheet material of 1mm; Carrying out calendering formation again handles: the sheet material that 1mm is thick imports accurate tri-roll press machine, and when roller temperature control during at 60 ℃, the sheet material slice of rolling into following the thickness of 0.3mm through rolling after cooling, forms slim radio frequency inhibition material sheet.
Embodiment 4: select alloy material Fe
85Si
6Cr
9Prepare the thick flexible sheet material of 0.3mm according to the method described above.Be that 85: 6: 9 iron, silicon, chromium is that material combination forms beyond the ferrous alloy material divided by mass ratio among the embodiment 4, all the other contents are identical with embodiment 3.
Embodiment 5: select alloy material Fe
85Si
6Al
9Prepare the thick flexible sheet material of 0.3mm according to the method described above.Be that 85: 6: 9 iron, silicon, aluminium is that material combination forms beyond the ferrous alloy material divided by mass ratio among the embodiment 5, all the other contents are identical with embodiment 3.
Embodiment 6: select alloy material Fe
90Si
5Al
3Prepare the thick flexible sheet material of 0.3mm according to the method described above.Be that 90: 5: 3 iron, silicon, aluminium is that material combination forms beyond the ferrous alloy material divided by mass ratio among the embodiment 6, all the other contents are identical with embodiment 3.
The slim radio noise that the embodiment of the invention provides suppresses material; The employing method for preparing forms; The slim radio noise of preparing suppresses the thickness of material less than 0.3mm, and electromagenetic wave radiation is to this material the time, and the reflectivity factor that records with arc method is referring to table 1; Can know: the reflection loss in 0.8GHz～10GHz frequency range is greater than-5db, and promptly the hertzian wave to 0.8GHz-10GHz has good squelch performance.
The squelch material of table 1, the embodiment of the invention is formed and the reflectivity performance
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.The content of not doing in this specification sheets to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (10)
1. a slim radio noise suppresses preparation methods, it is characterized in that may further comprise the steps:
A, be (85～90) with mass ratio: (5～10): (0～9): the iron of (0～9), silicon, chromium, aluminium are raw material, are combined to form ferrous alloy material, and carry out the processing of ball milling sheet;
B, with the ferrous alloy material after the processing of ball milling sheet and butyl rubber by mass ratio (8～9): mix (2～1), after moulding mixing and calendering formation, forms slim radio frequency and suppress material sheet.
2. slim radio noise as claimed in claim 1 suppresses preparation methods, and it is characterized in that: the mass ratio of iron described in the steps A, silicon, aluminium is 88.5: 7.5: 4.5.
3. slim radio noise as claimed in claim 1 suppresses preparation methods, and it is characterized in that: the mass ratio of iron described in the steps A, silicon, chromium is 85: 10: 5.
4. slim radio noise as claimed in claim 1 suppresses preparation methods, and it is characterized in that: the mass ratio of iron described in the steps A, silicon, chromium, aluminium is 88: 5: 4: 3.
5. suppress preparation methods like each described slim radio noise in the claim 1 to 4, it is characterized in that: in the steps A zirconia ball and ferrous alloy material pressed 12: 1 ball-to-powder weight ratio ball milling 20 hours, carry out the processing of ball milling sheet.
6. slim radio noise as claimed in claim 5 suppresses preparation methods; It is characterized in that: it is following to mould mixing process among the step B: behind ferrous alloy material and elastomeric material proportional mixing after the processing of ball milling sheet; After in mill, rolling 1 hour, be prepared into the thick sheet material of 1mm.
7. slim radio noise as claimed in claim 6 suppresses preparation methods, it is characterized in that: saidly mould that the mass ratio of ferrous alloy material and butyl rubber is 8.5: 1.5 in the mixing process.
8. slim radio noise as claimed in claim 6 suppresses preparation methods; It is characterized in that: the process of calendering formation is following among the step B: the sheet material that said 1mm is thick imports accurate tri-roll press machine; When roller temperature control during at 60 ℃; Roll into the sheet material slice of the following thickness of 0.3mm, through rolling after cooling.
9. a slim radio noise suppresses material, it is characterized in that: each described method is prepared from the employing claim 1 to 8.
10. slim radio noise as claimed in claim 9 suppresses material, it is characterized in that: the thickness that said slim radio noise suppresses material is less than 0.3mm, and the reflection loss in 0.8GHz～10GHz frequency range is greater than-5db.
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| CN 201210160571 CN102690468B (en) | 2012-05-23 | 2012-05-23 | Thin radio noise suppression material and preparation method thereof |
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| CN 201210160571 CN102690468B (en) | 2012-05-23 | 2012-05-23 | Thin radio noise suppression material and preparation method thereof |
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| CN102690468B CN102690468B (en) | 2013-08-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102977480A (en) * | 2012-12-07 | 2013-03-20 | 航天科工武汉磁电有限责任公司 | Method for preparing rubber base material flexible absorbing material |
| CN103881245A (en) * | 2014-04-11 | 2014-06-25 | 重庆市鸿富诚电子新材料有限公司 | Wave-absorbing material and preparation method thereof |
| CN104292526A (en) * | 2014-11-03 | 2015-01-21 | 济南中正新材料有限公司 | Ultra-thin continuous winding wave-absorbing material |
| CN104761835A (en) * | 2015-03-04 | 2015-07-08 | 浙江万佳热电器科技有限公司 | Preparation technology for electrothermal film heating pipe composite noise reduction material |
Citations (3)
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|---|---|---|---|---|
| US4474676A (en) * | 1983-02-28 | 1984-10-02 | Tdk Corporation | Electromagnetic interference shielding material |
| CN1536006A (en) * | 2003-04-03 | 2004-10-13 | �й�ʯ�ͻ����ɷ�����˾ | Composite powder, its preparation method and application |
| CN1646000A (en) * | 2004-11-30 | 2005-07-27 | 横店集团东磁有限公司 | Electromagnetic wave interference preventive material and production thereof |
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2012
- 2012-05-23 CN CN 201210160571 patent/CN102690468B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4474676A (en) * | 1983-02-28 | 1984-10-02 | Tdk Corporation | Electromagnetic interference shielding material |
| CN1536006A (en) * | 2003-04-03 | 2004-10-13 | �й�ʯ�ͻ����ɷ�����˾ | Composite powder, its preparation method and application |
| CN1646000A (en) * | 2004-11-30 | 2005-07-27 | 横店集团东磁有限公司 | Electromagnetic wave interference preventive material and production thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102977480A (en) * | 2012-12-07 | 2013-03-20 | 航天科工武汉磁电有限责任公司 | Method for preparing rubber base material flexible absorbing material |
| CN102977480B (en) * | 2012-12-07 | 2014-10-15 | 航天科工武汉磁电有限责任公司 | Method for preparing rubber base material flexible absorbing material |
| CN103881245A (en) * | 2014-04-11 | 2014-06-25 | 重庆市鸿富诚电子新材料有限公司 | Wave-absorbing material and preparation method thereof |
| CN103881245B (en) * | 2014-04-11 | 2016-02-10 | 重庆市鸿富诚电子新材料有限公司 | A kind of absorbing material and preparation method thereof |
| CN104292526A (en) * | 2014-11-03 | 2015-01-21 | 济南中正新材料有限公司 | Ultra-thin continuous winding wave-absorbing material |
| CN104761835A (en) * | 2015-03-04 | 2015-07-08 | 浙江万佳热电器科技有限公司 | Preparation technology for electrothermal film heating pipe composite noise reduction material |
| CN104761835B (en) * | 2015-03-04 | 2017-01-11 | 浙江万佳热电器科技有限公司 | Preparation technology for electrothermal film heating pipe composite noise reduction material |
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| CN102690468B (en) | 2013-08-21 |
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