CN109133716A - A kind of preparation method of electronic element radiating silica gel piece - Google Patents
A kind of preparation method of electronic element radiating silica gel piece Download PDFInfo
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- CN109133716A CN109133716A CN201810973149.6A CN201810973149A CN109133716A CN 109133716 A CN109133716 A CN 109133716A CN 201810973149 A CN201810973149 A CN 201810973149A CN 109133716 A CN109133716 A CN 109133716A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/022—Agglomerated materials, e.g. artificial aggregates agglomerated by an organic binder
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00422—Magnetic properties
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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- C—CHEMISTRY; METALLURGY
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a kind of preparation methods of electronic element radiating silica gel piece, specific preparation step are as follows: (1) be in mass ratio that 7:1:3 is mixed by iron oxide, zinc oxide, mangano-manganic oxide, obtain abrasive material, the poly-vinyl alcohol solution 1:1 in mass ratio that abrasive material and mass fraction are 20% is mixed to get suspension, suspension is put into ball mill, ball milling 20h, ball milling partial size are 0.15-0.3mm, obtain MnZn soft magnet oxygen powdery pulp.The present invention is using Mn-Zn soft magnetic ferrite powder as heat-conducting silica gel sheet conductive powder, the magnetic flux of Mn-Zn soft magnetic ferrite powder first is big, it is larger for the magnetic attracting force of certain metallic elements, so that heat-conducting silica gel sheet is not needed adhesive just can be carried out assembling, hand will not be glued, in addition Mn-Zn soft magnetic ferrite powder high temperature when electronic component is powered can be such that its magnetism weakens, and avoid heat-conducting silica gel sheet Nian Jie with heat dissipation element too closely, make assembly element, detachable maintaining is more convenient.
Description
Technical field
The invention belongs to silica gel pieces for technical field, and in particular to a kind of preparation side of electronic element radiating silica gel piece
Method.
Background technique
Electronic product use scope is very wide at present, indivisible in people's lives.And generating heat is that electronics produces
Product play the barrier of its superperformance, and thus high performance heat dissipation Heat Conduction Material comes into being.High thermal coefficient will add non-
The conduction powder of normal high number, thus will lead to and expect that the mobility before vulcanization is very poor, it is difficult to glass is infiltrated, to be realized thus
High thermal coefficient may not.Therefore, inventing a kind of magnetic heat-conducting silica gel sheet has product to silica gel piece preparation technical field
Pole meaning.
Summary of the invention
One, technical problems to be solved
The technical problem to be solved in the present invention is to provide a kind of preparation methods of electronic element radiating silica gel piece, to solve
The technical problem.
Two, technical solution
To solve the technical problem, the technical scheme adopted by the invention is that: a kind of electronic element radiating silica gel piece
Preparation method, specific preparation step are as follows:
(1) in mass ratio it is that 7:1:3 is mixed by iron oxide, zinc oxide, mangano-manganic oxide, abrasive material is obtained, by abrasive material and matter
The poly-vinyl alcohol solution 1:1 in mass ratio that amount score is 20% is mixed to get suspension, suspension is put into ball mill, ball milling
20h, ball milling partial size are 0.15-0.3mm, obtain MnZn soft magnet oxygen powdery pulp；
(2) MnZn soft magnet oxygen powdery pulp is poured into mold, mold is put into the press machine that pressure is 10-11MPa
After middle compacting 6-8min, mold is put into resistance furnace, demoulding obtains Mn-Zn soft magnetic ferrite powder after cooled to room temperature；
(3) according to parts by weight, 50-58 is added into the four-hole boiling flask with blender, reflux condensing tube, dropping funel
Part distilled water, 11-15 parts of dodecyl sodium sulfates, 4-5 parts of sodium bicarbonates, starting blender with speed of agitator is 200-215r/
Min stirring, warming-in-water is to 72-80 DEG C, after four-hole boiling flask is added in 40-44 parts of acrylic acid, 22-30 parts of methacrylic acids, after
Continuous reaction 10-14min, obtains seed emulsion；
(4) according to parts by weight, into above-mentioned four-hole boiling flask be added 22-30 parts of epoxidized soybean oils, then with dropping funel with
Drop rate is that 1-3 parts of potassium peroxydisulfates are added dropwise into four-hole boiling flask by 3-5mL/min, after being added dropwise, insulation reaction 30-38min,
Continue to be heated to 92-100 DEG C, insulation reaction 45-52min is cooled to 57-60 DEG C, the ammonium hydroxide for being 20% with mass fraction
PH to 6.0-7.0 is adjusted, discharging obtains acrylate latex；
(5) according to parts by weight, 20-28 parts of ethylene-vinyl acetate copolymers, 42-50 parts of glass fibres, 10- are weighed
14 parts of expanded graphite powder, 9-10 parts of vinyl ester resins are put into reaction kettle, are heated to 230-245 DEG C, are kneaded 3.5-5h,
Fiberglass resin is obtained after being cooled to room temperature；
(6) in mass ratio it is that 2:1:5 is mixed by Mn-Zn soft magnetic ferrite powder, acrylate latex, fiberglass resin, is put into temperature
Degree is stainless steel mould to be placed on vulcanizing press after preheating 31-35min, heat temperature raising in 100-145 DEG C of stainless steel mould
To 200-215 DEG C, moulding pressure 16-20MPa, heat-insulation pressure keeping 4-4.5h, mold is taken out, is cooled to room temperature, obtains after die sinking
Vulcanize silica gel piece, it is the 10-15min that magnetizes in 1.3-1.8Tesla capacitor magnet charger that vulcanization silica gel piece, which is placed in magnetic field strength, is obtained
To magnetic heat-conducting silica gel sheet.
Die size described in step (2) is 40mm × 40mm × 100mm, and mold is put into sintering process in resistance furnace are as follows:
It is warming up to 1055-1100 DEG C, heat preservation sintering 2-2.5h with the rate of 2-3 DEG C/min, continuation is risen to same heating rate
After 1210-1250 DEG C, it is naturally cooling to 1055-1100 DEG C immediately, heat preservation sintering 1-1.5h.
Three, beneficial effect
The present invention is compared to the prior art, has the following beneficial effects:
One, the present invention is using Mn-Zn soft magnetic ferrite powder as heat-conducting silica gel sheet conductive powder, Mn-Zn soft magnetic ferrite powder first
Magnetic flux it is big, larger for the magnetic attracting force of certain metallic elements, so that heat-conducting silica gel sheet is not needed adhesive just can be carried out
Assembling, will not glue hand, and in addition Mn-Zn soft magnetic ferrite powder high temperature when electronic component is powered can be such that its magnetism weakens, and avoid thermally conductive
Silica gel piece is Nian Jie with heat dissipation element too closely, makes assembly element, and detachable maintaining is more convenient.
Two, interfacial adhesion material of the acrylic latex in heat-conducting silica gel sheet as fiberglass resin and conductive powder in the present invention
Expect, hydroxyl condensation dehydration occurs for epoxidized soybean oil and acrylate to form network in the preparation process of acrylic latex
Interpenetrating cross-linked structure contains epoxy group, ehter bond, hydroxyl isopolarity group and activity group in epoxidized soybean oil, makes propylene
Acid esters latex shows excellent adhesive strength, electrical insulation capability and high temperature resistance, and phenyl ring assigns latex heat resistance and rigidity,
Epoxy group and hydroxyl make material have reactivity adhesion strength, and the dehydrating condensation of multiple hydroxyls rises crosslink density, in circuit
Under hot conditions when plate works, latex is because of high crosslink density viscosity meeting minor change, and in addition vinyl ester resin passes through idol
Connection effect can improve the compatibility of Mn-Zn soft magnetic ferrite powder and glass fibre, and expanded graphite powder can be in thermal conductive silicon when high temperature
Expansion connect to form heat conduction network with thermally conductive Mn-Zn soft magnetic ferrite powder in film, to improve the thermal conductivity of heat-conducting silica gel sheet
Energy.
Specific embodiment
Below with reference to embodiment, a specific embodiment of the invention is described in detail.
Embodiment 1
In mass ratio it is that 7 ︰, 1 ︰ 3 is mixed by iron oxide, zinc oxide, mangano-manganic oxide, obtains abrasive material, by abrasive material and quality point
Number is that 1 ︰ 1 is mixed to get suspension for 20% poly-vinyl alcohol solution in mass ratio, and suspension is put into ball mill, controls ball
Abrasive grain diameter is 0.15mm, ball milling 20h, obtains MnZn soft magnet oxygen powdery pulp；MnZn soft magnet oxygen powdery pulp is poured into ruler
Very little is to be put into mold after suppressing 6min in press machine with the pressure of 10MPa, in 40mm × 40mm × 100mm mold by mold
It is put into resistance furnace, is warming up to 1055 DEG C, heat preservation sintering 2h with the rate of 2 DEG C/min, continuation is risen to same heating rate
After 1210 DEG C, it is naturally cooling to 1055 DEG C, heat preservation sintering 1h immediately, demoulding obtains MnZn soft magnet oxygen after cooled to room temperature
Body powder；According to parts by weight, to blender, reflux condensing tube, dropping funel four-hole boiling flask in be added 50 parts of distilled water,
11 parts of dodecyl sodium sulfates, 4 parts of sodium bicarbonates are started blender and are stirred with the revolving speed of 200r/min, warming-in-water to 72 DEG C,
After four-hole boiling flasks are added in 40 parts of acrylic acid, 22 parts of methacrylic acids, the reaction was continued 10min obtains seed emulsion；By weight
Number meter, 22 parts of epoxidized soybean oils is added into above-mentioned four-hole boiling flask, then be added dropwise into four-hole boiling flask with 3mL/min with dropping funel
1 part of potassium peroxydisulfate is added dropwise in rate, and after being added dropwise, insulation reaction 30min continues to be heated to 92 DEG C, insulation reaction
45min is cooled to 57 DEG C, and adjusting pH with the ammonium hydroxide of mass fraction 20% is 6.0, and discharging obtains acrylate latex；By weight
Number meter weighs 20 parts of ethylene-vinyl acetate copolymers, 42 parts of glass fibres, 10 parts of expanded graphite powder, 9 parts of vinyl esters
Resin is put into reaction kettle, is heated to 230 DEG C, is kneaded 3.5h, is obtained fiberglass resin after being cooled to room temperature；It is in mass ratio
Mn-Zn soft magnetic ferrite powder, acrylate latex, fiberglass resin are mixed, are put into and are preheated to 100 DEG C of stainless steel mold by 2 ︰, 1 ︰ 5
In tool, stainless steel mould is placed on vulcanizing press after preheating 31min, 200 DEG C is heated to, is forced into 16MPa, kept the temperature
Pressure maintaining 4h takes out mold, is cooled to room temperature after die sinking, obtains vulcanization silica gel piece, and vulcanization silica gel piece is placed in capacitor magnet charger
Magnetize 10min, and control magnetizes magnetic field strength as 1.3Tesla, obtains magnetic heat-conducting silica gel sheet.
Embodiment 2
In mass ratio it is that 7 ︰, 1 ︰ 3 is mixed by iron oxide, zinc oxide, mangano-manganic oxide, obtains abrasive material, by abrasive material and quality point
Number is that 1 ︰ 1 is mixed to get suspension for 20% poly-vinyl alcohol solution in mass ratio, and suspension is put into ball mill, controls ball
Abrasive grain diameter is 0.2mm, and ball milling 20 obtains MnZn soft magnet oxygen powdery pulp；MnZn soft magnet oxygen powdery pulp is poured into size
Mold to be put into after suppressing 7min in press machine with the pressure of 11MPa, mold being put in 40mm × 40mm × 100mm mold
Enter in resistance furnace, is warming up to 1070 DEG C, heat preservation sintering 2.5h with the rate of 2 DEG C/min, continuation is risen to same heating rate
After 1225 DEG C, it is naturally cooling to 1070 DEG C, heat preservation sintering 1.5h immediately, demoulding obtains MnZn soft magnet after cooled to room temperature
Oxysome powder；According to parts by weight, 54 parts of distillations are added into the four-hole boiling flask with blender, reflux condensing tube, dropping funel
Water, 13 parts of dodecyl sodium sulfates, 4 parts of sodium bicarbonates are started blender and are stirred with the revolving speed of 210r/min, warming-in-water to 76
DEG C, after four-hole boiling flasks are added in 42 parts of acrylic acid, 26 parts of methacrylic acids, the reaction was continued 12min obtains seed emulsion；By weight
Measure number meter, into above-mentioned four-hole boiling flask be added 26 parts of epoxidized soybean oils, then with dropping funel into four-hole boiling flask with 4mL/min
2 parts of potassium peroxydisulfates are added dropwise in drop rate, and after being added dropwise, insulation reaction 34min continues to be heated to 96 DEG C, insulation reaction
48min is cooled to 57 DEG C, and adjusting pH with the ammonium hydroxide of mass fraction 20% is 6.5, and discharging obtains acrylate latex；By weight
Number meter weighs 24 parts of ethylene-vinyl acetate copolymers, 46 parts of glass fibres, 12 parts of expanded graphite powder, 9 parts of vinyl esters
Resin is put into reaction kettle, is heated to 240 DEG C, is kneaded 4h, is obtained fiberglass resin after being cooled to room temperature；It is in mass ratio 2 ︰
Mn-Zn soft magnetic ferrite powder, acrylate latex, fiberglass resin are mixed, are put into and are preheated to 120 DEG C of stainless steel mould by 1 ︰ 5
In, stainless steel mould is placed on vulcanizing press after preheating 33min, is heated to 210 DEG C, is forced into 18MPa, heat preservation is protected
4.5h is pressed, mold is taken out, is cooled to room temperature after die sinking, obtains vulcanization silica gel piece, vulcanization silica gel piece is placed in capacitor magnet charger
Magnetize 12min, and control magnetizes magnetic field strength as 1.5Tesla, obtains magnetic heat-conducting silica gel sheet.
Embodiment 3
In mass ratio it is that 7 ︰, 1 ︰ 3 is mixed by iron oxide, zinc oxide, mangano-manganic oxide, obtains abrasive material, by abrasive material and quality point
Number is that 1 ︰ 1 is mixed to get suspension for 20% poly-vinyl alcohol solution in mass ratio, and suspension is put into ball mill, controls ball
Abrasive grain diameter is 0.3mm, ball milling 20h, obtains MnZn soft magnet oxygen powdery pulp；MnZn soft magnet oxygen powdery pulp is poured into size
Mold to be put into after suppressing 8min in press machine with the pressure of 11MPa, mold being put in 40mm × 40mm × 100mm mold
Enter in resistance furnace, is warming up to 1100 DEG C, heat preservation sintering 2.5h with the rate of 3 DEG C/min, continuation is risen to same heating rate
After 1250 DEG C, it is naturally cooling to 1100 DEG C, heat preservation sintering 1.5h immediately, demoulding obtains MnZn soft magnet after cooled to room temperature
Oxysome powder；According to parts by weight, 58 parts of distillations are added into the four-hole boiling flask with blender, reflux condensing tube, dropping funel
Water, 15 parts of dodecyl sodium sulfates, 5 parts of sodium bicarbonates are started blender and are stirred with the revolving speed of 215r/min, warming-in-water to 80
DEG C, after four-hole boiling flasks are added in 44 parts of acrylic acid, 30 parts of methacrylic acids, the reaction was continued 14min obtains seed emulsion；By weight
Measure number meter, into above-mentioned four-hole boiling flask be added 30 parts of epoxidized soybean oils, then with dropping funel into four-hole boiling flask with 5mL/min
3 parts of potassium peroxydisulfates are added dropwise in drop rate, and after being added dropwise, insulation reaction 38min continues to be heated to 100 DEG C, insulation reaction
52min is cooled to 60 DEG C, and adjusting pH with the ammonium hydroxide of mass fraction 20% is 7.0, and discharging obtains acrylate latex；By weight
Number meter weighs 28 parts of ethylene-vinyl acetate copolymers, 50 parts of glass fibres, 14 parts of expanded graphite powder, 10 parts of vinyl esters
Resin is put into reaction kettle, is heated to 245 DEG C, is kneaded 5h, is obtained fiberglass resin after being cooled to room temperature；It is in mass ratio 2 ︰
Mn-Zn soft magnetic ferrite powder, acrylate latex, fiberglass resin are mixed, are put into and are preheated to 145 DEG C of stainless steel mould by 1 ︰ 5
In, stainless steel mould is placed on vulcanizing press after preheating 35min, is heated to 215 DEG C, is forced into 20MPa, heat preservation is protected
4.5h is pressed, mold is taken out, is cooled to room temperature after die sinking, obtains vulcanization silica gel piece, vulcanization silica gel piece is placed in capacitor magnet charger
Magnetize 15min, and control magnetizes magnetic field strength as 1.8Tesla, obtains magnetic heat-conducting silica gel sheet.
Comparative example
With the magnetic heat-conducting silica gel sheet of Henan company production as a comparison case to magnetic heat conductive silica gel produced by the present invention
Magnetic heat-conducting silica gel sheet in piece and comparative example carries out performance detection, and testing result is as shown in table 1:
1, test method:
Determination of conductive coefficients is detected by GBT 5990-2006 standard；
Gluing strength test is stretched to be detected by JC/T547-2005 standard；
High temperature resistant type test: by thermally conductive sheet after molding, thermally conductive sheet is the aluminium sheet of surfacing up and down, and it is dry to be put into constant temperature
In dry case, its hardness of partial test and thermal resistance variation are taken out in 250 DEG C of agings in 200h respectively.
The test method of hardness is referring to " ASTM D2240-2005 rubber hardness testing standard "
The test method of thermal resistance is referring to " ASTM D5470-2006 heat transfer solid electrical insulation thin material heat-conductive characteristic is surveyed
Method for testing (10.02) "
1 silica gel piece performance measurement result of table
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example |
| Thermal coefficient (W/mK) | 3.1 | 3.2 | 3.3 | 1.5 |
| It stretches gluing intensity (MPa) | 5.5 | 5.4 | 5.3 | 3.5 |
| Thermal resistance (m before aging2k/W) | 2.020 | 2.022 | 2.025 | 1.055 |
| Hardness (HR) before aging | 31 | 30 | 27 | 45 |
| Thermal resistance (m2k/W) after 200h aging | 1.986 | 1.995 | 1.993 | 0.983 |
| Hardness (HR) after 200h aging | 42 | 41 | 33 | 55 |
High according to the magnetic heat-conducting silica gel sheet thermal coefficient produced by the present invention of data among the above, good heat conductivity is glued
Knotting strength is high, and high temperature resistance is good, has broad application prospects.
The above is only specific application examples of the invention, are not limited in any way to protection scope of the present invention.
Claims (2)
1. a kind of preparation method of electronic element radiating silica gel piece, which is characterized in that specific preparation step are as follows:
(1) in mass ratio it is that 7:1:3 is mixed by iron oxide, zinc oxide, mangano-manganic oxide, abrasive material is obtained, by abrasive material and quality point
Number is mixed to get suspension for 20% poly-vinyl alcohol solution 1:1 in mass ratio, suspension is put into ball mill, ball milling 20h,
Ball milling partial size is 0.15-0.3mm, obtains MnZn soft magnet oxygen powdery pulp；
(2) MnZn soft magnet oxygen powdery pulp is poured into mold, mold is put into the press machine that pressure is 10-11MPa and is pressed
After 6-8min processed, mold is put into resistance furnace, demoulding obtains Mn-Zn soft magnetic ferrite powder after cooled to room temperature；
(3) according to parts by weight, 50-58 parts of steamings are added into the four-hole boiling flask with blender, reflux condensing tube, dropping funel
Distilled water, 11-15 part dodecyl sodium sulfate, 4-5 parts of sodium bicarbonates, starting blender are stirred with speed of agitator for 200-215r/min
It mixes, warming-in-water is to 72-80 DEG C, and after four-hole boiling flask is added in 40-44 parts of acrylic acid, 22-30 parts of methacrylic acids, the reaction was continued
10-14min obtains seed emulsion；
(4) according to parts by weight, 22-30 parts of epoxidized soybean oils are added into above-mentioned four-hole boiling flask, then with dropping funel to be added dropwise
Rate is that 1-3 parts of potassium peroxydisulfates are added dropwise into four-hole boiling flask by 3-5mL/min, and after being added dropwise, insulation reaction 30-38min continues
It is heated to 92-100 DEG C, insulation reaction 45-52min is cooled to 57-60 DEG C, is adjusted with the ammonium hydroxide that mass fraction is 20%
PH to 6.0-7.0, discharging, obtains acrylate latex；
(5) according to parts by weight, 20-28 parts of ethylene-vinyl acetate copolymers, 42-50 parts of glass fibres, 10-14 parts are weighed
Expanded graphite powder, 9-10 parts of vinyl ester resins are put into reaction kettle, are heated to 230-245 DEG C, are kneaded 3.5-5h, cooling
Fiberglass resin is obtained after to room temperature；
It (6) is in mass ratio that 2:1:5 is mixed by Mn-Zn soft magnetic ferrite powder, acrylate latex, fiberglass resin, being put into temperature is
In 100-145 DEG C of stainless steel mould, stainless steel mould is placed on vulcanizing press after preheating 31-35min, is heated to
200-215 DEG C, moulding pressure 16-20MPa, heat-insulation pressure keeping 4-4.5h, mold is taken out, is cooled to room temperature after die sinking, obtains sulphur
SiClx film, it is the 10-15min that magnetizes in 1.3-1.8Tesla capacitor magnet charger that vulcanization silica gel piece, which is placed in magnetic field strength, is obtained
Magnetic heat-conducting silica gel sheet.
2. silica gel piece according to claim 1, it is characterised in that: die size described in step (2) is 40mm × 40mm
× 100mm, mold are put into sintering process in resistance furnace are as follows: are warming up to 1055-1100 DEG C with the rate of 2-3 DEG C/min, heat preservation is burnt
2-2.5h is tied, after continuation rises to 1210-1250 DEG C with same heating rate, is naturally cooling to 1055-1100 DEG C immediately, heat preservation
It is sintered 1-1.5h.
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| CN201810973149.6A CN109133716A (en) | 2018-08-24 | 2018-08-24 | A kind of preparation method of electronic element radiating silica gel piece |
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| CN201810973149.6A CN109133716A (en) | 2018-08-24 | 2018-08-24 | A kind of preparation method of electronic element radiating silica gel piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231882A (en) * | 2018-10-12 | 2019-01-18 | 屠国存 | A kind of preparation method of environmental protection magnetostriction materials |
| US20240096530A1 (en) * | 2022-09-20 | 2024-03-21 | Peking University | Flexible permanent magnetic material, preparation method and application thereof in magnetic biological effect products |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1960130A (en) * | 2005-11-02 | 2007-05-09 | 四川大学 | Magnetoconductivity material in use for slot wedge of motor of possessing structure of interpenetrating networks, and preparation method |
| CN107603505A (en) * | 2017-10-17 | 2018-01-19 | 陈合华 | A kind of preparation method of thermostable heat-conductive foam rubber |
-
2018
- 2018-08-24 CN CN201810973149.6A patent/CN109133716A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1960130A (en) * | 2005-11-02 | 2007-05-09 | 四川大学 | Magnetoconductivity material in use for slot wedge of motor of possessing structure of interpenetrating networks, and preparation method |
| CN107603505A (en) * | 2017-10-17 | 2018-01-19 | 陈合华 | A kind of preparation method of thermostable heat-conductive foam rubber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231882A (en) * | 2018-10-12 | 2019-01-18 | 屠国存 | A kind of preparation method of environmental protection magnetostriction materials |
| US20240096530A1 (en) * | 2022-09-20 | 2024-03-21 | Peking University | Flexible permanent magnetic material, preparation method and application thereof in magnetic biological effect products |
| US12087482B2 (en) * | 2022-09-20 | 2024-09-10 | Peking University | Flexible permanent magnetic material, preparation method and application thereof in magnetic biological effect products |
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Application publication date: 20190104 |
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| WW01 | Invention patent application withdrawn after publication |