CN102690468B - 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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- CN102690468B CN102690468B CN 201210160571 CN201210160571A CN102690468B CN 102690468 B CN102690468 B CN 102690468B CN 201210160571 CN201210160571 CN 201210160571 CN 201210160571 A CN201210160571 A CN 201210160571A CN 102690468 B CN102690468 B CN 102690468B
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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 electromagnetic interference of product simultaneously.Electromagnetic interference 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, electromagnetic interference) solution is to use the conductive shield material to solve the Radio frequency interference problem of electronic product, yet the conductive shield material can bring electromagnetic self-reflection interference problem, and perhaps the coupling that produces because of reflection interference causes its adjacent susceptible device susceptor disturbed.Particularly at highly integrated electronics PCB (Printed Circuit Board, printed circuit board (PCB)) board level system, can produce complicated cross-talk problem because work long hours in electromagnetic interference, only depend on shielding and grounding technology to be difficult to be solved.
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 isoprene-isobutylene rubber by mass ratio (8～9): mix (2～1), through mould mixing and calendering formation after, form 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 ratio of grinding media to material ball milling 20 hours, carry out the processing of ball milling sheet.
In technique scheme, it is as follows to mould mixing process among the step B: after the ferrous alloy material after the processing of ball milling sheet and elastomeric material are mixed in proportion, in mill, roll 1 hour after, be prepared into the thick sheet material of 1mm.
In technique scheme, describedly mould that the mass ratio of ferrous alloy material and isoprene-isobutylene rubber is 8.5: 1.5 in the mixing process.
In technique scheme, the process of calendering formation is as follows among the step B: the sheet material that described 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, described 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 as follows:
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 the absorbing material with higher magnetic permcability loss, when electromagenetic wave radiation is to this material, with arc method measurement reflection loss greater than-5db (decibel) is arranged, mobile phone, computer, digital camera, pick up camera, TV etc. can be used for, the electromagnetic interference that the ultra-thin development of present electronic product brings can be effectively suppressed.
(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 that a kind of thickness is less than the slim continuous sheet of 0.3mm, be to have the ferrous alloy material of high magnetic permeability loss and the composition that the polymer rubber base material mixes, do not need through sulfidation, and have splendid snappiness.
Embodiment
The present invention is described in further detail below in conjunction with specific embodiment.
The slim radio noise that the embodiment of the invention provides suppresses the manufacture method 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 ratio of grinding media to material 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 isoprene-isobutylene rubber by mass ratio (8～9): mix (2～1), mould mixing processing: after the ferrous alloy material after the processing of ball milling sheet and elastomeric material are mixed in proportion, 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 the following thickness of 0.3mm through rolling after cooling, forms slim radio frequency inhibition material sheet.
Describe below by 6 specific embodiments.
Embodiment 1: select alloy material Fe
88Si
7.5Al
4.5Prepare the thick flexible sheet material of 0.3mm according to above-mentioned manufacture method.
Be that 88: 7.5: 4.5 iron, silicon, aluminium is raw material with mass ratio, be combined to form ferrous alloy material, zirconia ball and ferrous alloy material by 12: 1 ratio of grinding media to material ball milling 20 hours, are carried out the processing of ball milling sheet; Ferrous alloy material after the processing of ball milling sheet and isoprene-isobutylene rubber are pressed mass ratio mixing in 9: 1, wherein the ferrous alloy material massfraction is 90%, the massfraction of isoprene-isobutylene rubber and Synergist S-421 95 is 10%, mould mixing processing: after the ferrous alloy material after the processing of ball milling sheet and elastomeric material are mixed in proportion, 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 the following 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.
Be that 85: 10: 5 iron, silicon, chromium is raw material with mass ratio, be combined to form ferrous alloy material, zirconia ball and ferrous alloy material by 12: 1 ratio of grinding media to material ball milling 20 hours, are carried out the processing of ball milling sheet; Ferrous alloy material after the processing of ball milling sheet and isoprene-isobutylene rubber are pressed mass ratio mixing in 8: 2, wherein the ferrous alloy material massfraction is 80%, the massfraction of isoprene-isobutylene rubber and Synergist S-421 95 is 20%, mould mixing processing: after the ferrous alloy material after the processing of ball milling sheet and elastomeric material are mixed in proportion, 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 the following 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.
Be 88: 5: 4 with mass ratio: 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 ratio of grinding media to material ball milling 20 hours, are carried out the processing of ball milling sheet; Ferrous alloy material after the processing of ball milling sheet and isoprene-isobutylene rubber are pressed mass ratio mixing in 8.5: 1.5, wherein the ferrous alloy material massfraction is 85%, the massfraction of isoprene-isobutylene rubber and Synergist S-421 95 is 15%, mould mixing processing: after the ferrous alloy material after the processing of ball milling sheet and elastomeric material are mixed in proportion, 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 the following 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, electromagenetic wave radiation is to this material the time, the reflectivity factor that records with arc method is referring to table 1, as can be known: the reflection loss in 0.8GHz～10GHz frequency range is greater than-5db, and namely 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, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.The content that is not described in detail in this specification sheets 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 isoprene-isobutylene rubber by mass ratio (8～9): mix (2～1), through mould mixing and calendering formation after, form 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 as 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 ratio of grinding media to material 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 as follows to mould mixing process among the step B: after the ferrous alloy material after the processing of ball milling sheet and elastomeric material are mixed in proportion, 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: describedly mould that the mass ratio of ferrous alloy material and isoprene-isobutylene 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 as follows among the step B: the sheet material that described 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 described 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 true CN102690468B (en) | 2013-08-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
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 |
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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 |
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