CN1327025A - Insulating heat conductive silicon grease material - Google Patents
Insulating heat conductive silicon grease material Download PDFInfo
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- CN1327025A CN1327025A CN01120501A CN01120501A CN1327025A CN 1327025 A CN1327025 A CN 1327025A CN 01120501 A CN01120501 A CN 01120501A CN 01120501 A CN01120501 A CN 01120501A CN 1327025 A CN1327025 A CN 1327025A
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- heat
- heat conductive
- grease
- conductive silicon
- insulating heat
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- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The electrically insulating and heat conducting material for electronic manufacture, especially electronic parts, is one kind of fatty heat dispersing and conducting material. It consists of methyl silicone oil 30-55 wt%, glycerine 1-6 wt% and aluminium nitride powder 40-65 wt%. Compared with available technology, the electrically insulating the heat conducting silicone grease has higher heat dispersing effect, and thus can raise the service life and working stability of electronic devices.
Description
The invention belongs to electronics manufacturing and use the insulating heat-conduction material field.Being specially adapted to electronic unit adopts a kind of ointment shape insulating heat-conduction material of non-drying type as the heat radiation conducting band.
Along with developing rapidly of electronics integrated technology and package technique, products such as vacuum electronic components and parts, electric ballast, large-scale integrated circuit and electronic application complete machine are more and more higher to the requirement of insulating radiation.As heat conductive insulating assembling between heat conductive insulating, unicircuit and the radiator element of sealing, rectifier and the thermistor of the protection of being connected of ceramic substrate in the transistor and copper seat, die and shell etc.In these devices, owing to contact between the interface not exclusively produces bigger thermal contact resistance, make the hot-fluid transmission be subjected to very big obstruction, cause the very big temperature difference in interface.After coating insulating heat conductive silicon grease at these interfaces, can effectively fill up the clearance of contact surface, thereby reduce thermal contact resistance greatly, reduce the working temperature of electronic devices and components, improve reliability and prolongs life.Insulating heat conductive silicon grease is mainly mixed by grease and pressed powder heat conductive filler, and grease commonly used has mineral oil, silicone oil, fluorocarbon oil etc., and heat conductive filler is powder such as aluminum oxide, zinc oxide.Main drawback is that the thermal conductivity of heat conductive filler is low, so just causes dissipation from electronic devices slow, and work-ing life is short, phenomenons such as easy ablation.
The objective of the invention is to propose the insulating heat conductive silicon grease material of a kind of thermal conductivity height, good insulation preformance.
According to the object of the invention, the concrete composition of insulating heat conductive silicon grease that we propose is (weight %): methyl-silicone oil 30-55%, glycerine 1-6%, aluminum nitride powder 40-65%.Wherein, methyl-silicone oil forms ointment shape material as main carrier with heat conductive filler, can not separate admittedly by oil after shelving for a long time; Glycerine is stablizer and dispersion agent, is convenient to pressed powder and is scattered in and forms steady suspension in the silicone oil; Aluminum nitride powder is the insulating heat-conductive filler.Used methyl-silicone oil and glycerine are commercially available chemically pure reagent; Aluminum nitride powder is a kind of canescence powder, and density is 3.26g/cm
3, fusing point is 2450 ℃, and theoretical thermal conductivity is 320W/mk, and resistivity is 3 * 10
14Ω cm.The mean particle size of used aluminum nitride powder is 0.1-2.0 μ m.
Heat conductive filler plays decisive role to the heat conductivility of heat-conducting silicone grease.The present invention adopts aluminium nitride as heat conductive filler, its objective is under the preceding topic that keeps former good combination property, improve the use temperature of electron device as much as possible, therefore the selected heat conductive filler of the present invention has higher thermal conductivity, and aluminium nitride that the present invention adopts sees Table 1 as the performance comparison of heat conductive filler and prior art heat conductive filler.The performance comparison of table 1 aluminium nitride and other filler
| Title material | Thermal conductivity (W/mk) | Resistivity (25 ℃, Ω cm) | Density (g/cm 3) |
| Aluminium nitride | ??????320 | ?????3×10 14 | ?????3.26 |
| Aluminum oxide | ??????25 | ?????1×10 16 | ?????3.97 |
| Zinc oxide | ??????28 | ?????2×10 15 | ?????5.6 |
The preparation method of heat-conducting silicone grease of the present invention is: take by weighing the methyl-silicone oil and the glycerine of corresponding weight respectively by designed composition range, put into container for stirring evenly after, again the aluminum nitride powder that weighs up is put into mixed solvent, can pack standby after stirring.
Insulating heat conductive silicon grease of the present invention has been owing to adopted the filler of high thermal conductivity coefficient, thus compared with prior art have higher thermal conductivity, and other performance is close.Can improve the working temperature of electron tube in use, improve the job stability and the work-ing life of electron device.
Explanation of tables:
The performance comparison of table 1 aluminium nitride and other filler
The concrete composition (weight %) and the thermal conductivity of table 2 heat-conducting silicone grease of the present invention
Table 3 insulating heat conductive silicon grease of the present invention and existing silicone grease salient features are relatively
The result of use of table 4 the present invention and commercially available prior art heat-conducting silicone grease relatively
Embodiment
Composition scope designed according to this invention, we prepare the insulating heat conductive silicon grease of three kinds of different proportionings, and its content sees Table 2.The preparation method spares equal stirring and evenly mixing after weighing by set amount in molten device, and then, be applied on the transistor of different model, in order to contrast conveniently, we have also exemplified three kinds of commercially available heat-conducting silicone greases, and they adopt aluminum oxide or zinc oxide as heat conductive filler, its salient features relatively sees Table 3, and table 4 is that the effect of the embodiment of the invention and commercially available heat-conducting silicone grease compares.
The concrete composition (weight %) and the thermal conductivity of table 2 heat-conducting silicone grease of the present invention
| Code | Methyl-silicone oil | Glycerine | Aluminum nitride powder (granularity) | Thermal conductivity (W/mk) |
| Heat-conducting silicone grease A | ????38％ | ??3 | ????59 | ?????2.0 |
| Heat-conducting silicone grease B | ????45 | ??4 | ????51 | ?????1.9 |
| Heat-conducting silicone grease C | ????53 | ??5 | ????42 | ?????1.7 |
Table 3 insulating heat conductive silicon grease of the present invention and existing silicone grease salient features are relatively
Annotate: the performance perameter of above three kinds of commercially available heat-conducting silicone greases is all selected from its product description or product brief introduction.
| Heat conductive filler | Thermal conductivity (W/mk) | Resistivity (25 ℃, Ω cm) | Breaking down field strength (kv/mm) | Penetration degree (25 ℃/24hr) | Use temperature (℃) | |
| The present invention | Aluminium nitride | ????＞1.5 | ???＞10 13 | ????＞5 | ???72 | ??-60 -??+150 |
| The KDZ-2 thermal grease conduction | Aluminum oxide | ????0.65 | ???＞10 15 | ????＞10 | ???76 | ??-60 -??+100 |
| The SZ high efficacy heat conduction grease | Zinc oxide | ????0.96 | ???＞10 13 | ????＞6 | ???72 | ??-60 -??+150 |
| The T-50 heat-conducting silicone grease | Zinc oxide | ????＞0.913 | ???＞10 13 | ????＞4 | ??-60- ??+200 |
The result of use of table 4 the present invention and commercially available prior art heat-conducting silicone grease relatively
| Case temperature (℃) | Heat-conducting silicone grease A | Heat-conducting silicone grease B | Heat-conducting silicone grease C | The KDZ-2 thermal grease conduction | The SZ high efficacy heat conduction grease | The T-50 heat-conducting silicone grease |
| 3DD8 transistor npn npn (100W) | ??50℃ | ??51℃ | ??52℃ | ??59℃ | ??58℃ | ?60℃ |
| DD20, G4 transistor (45W) | ??61℃ | ??63℃ | ??64℃ | ??68℃ | ?67.5℃ | ?69℃ |
| 3DF5B, F4 transistor (72W) | ??70℃ | ??72℃ | ??74℃ | ??80℃ | ?79.5℃ | ?79℃ |
According to embodiment as seen, heat-conducting silicone grease of the present invention has better heat-transfer effect than prior art heat-conducting silicone grease, effectively reduce the temperature of package, improve electronic devices and components such as transistor stability, prolong device lifetime (generally speaking, 8 ℃ of the every reductions of case temperature, tube life-span prolongs one times).
Claims (2)
1, a kind of insulating heat conductive silicon grease, the concrete composition that it is characterized in that this insulating heat conductive silicon grease is (weight %): methyl-silicone oil 30-55%, glycerine 1-6%, aluminum nitride powder 40-65%.
2,, it is characterized in that the aluminum nitride powder mean particle size is at 0.1-2.0 μ m according to the described insulating heat conductive silicon grease of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01120501A CN1327025A (en) | 2001-07-17 | 2001-07-17 | Insulating heat conductive silicon grease material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01120501A CN1327025A (en) | 2001-07-17 | 2001-07-17 | Insulating heat conductive silicon grease material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1327025A true CN1327025A (en) | 2001-12-19 |
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ID=4664184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01120501A Pending CN1327025A (en) | 2001-07-17 | 2001-07-17 | Insulating heat conductive silicon grease material |
Country Status (1)
| Country | Link |
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| CN (1) | CN1327025A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100572490C (en) * | 2005-10-20 | 2009-12-23 | 鸿富锦精密工业（深圳）有限公司 | A kind of method of synthetic thermal grease |
| CN1986643B (en) * | 2005-12-23 | 2010-05-12 | 富准精密工业(深圳)有限公司 | Silicone grease composition |
| CN107274983A (en) * | 2017-07-21 | 2017-10-20 | 国网山东省电力公司临沂供电公司 | High pressure flexible direct current cable |
-
2001
- 2001-07-17 CN CN01120501A patent/CN1327025A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100572490C (en) * | 2005-10-20 | 2009-12-23 | 鸿富锦精密工业（深圳）有限公司 | A kind of method of synthetic thermal grease |
| CN1986643B (en) * | 2005-12-23 | 2010-05-12 | 富准精密工业(深圳)有限公司 | Silicone grease composition |
| CN107274983A (en) * | 2017-07-21 | 2017-10-20 | 国网山东省电力公司临沂供电公司 | High pressure flexible direct current cable |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |