CN105088020A - Efficient composite heat dissipation material for LEDs - Google Patents
Efficient composite heat dissipation material for LEDs Download PDFInfo
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- CN105088020A CN105088020A CN201510478124.5A CN201510478124A CN105088020A CN 105088020 A CN105088020 A CN 105088020A CN 201510478124 A CN201510478124 A CN 201510478124A CN 105088020 A CN105088020 A CN 105088020A
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Abstract
The invention relates to an efficient composite heat dissipation material for LEDs. The efficient composite heat dissipation material comprises, by weight, 100 parts of aluminum, 10-12 parts of zinc oxide, 6-7 parts of beryllium and 2-3 parts of cobalt. The formula of the material of a traditional heat dissipation fin for heat dissipation in the field of LEDs is improved and optimized, so that the efficient composite heat dissipation material for LEDs has a low heat conduction coefficient which is closer to the heat conduction coefficient of common heat conduction silicone grease, and accordingly the efficient composite heat dissipation material for LEDs can cooperate with the heat conduction silicone grease conveniently to achieve higher heat conduction efficiency.
Description
Technical field
The present invention relates to heat sink material, be specifically related to a kind of LED high efficiency composition heat sink material.
Background technology
In the manufacture field of photodiode (LED), due to the restriction of technology, the photoelectric transformation efficiency of LED need to improve, especially large-power LED light bead, because its power is higher, the electric energy of nearly more than 60% will become heat energy release, and this just has higher requirement to the thermal diffusivity of large-power light-emitting diodes.In the prior art, normally heat-conducting silicone grease is coated on aluminum fin or copper heat spreader, but we know, the thermal conductivity of aluminium is about 200W/mK, and the thermal conductivity of general heat-conducting silicone grease only has 1 ~ 2W/mK, which results in some cases, silicone grease has become to hinder one of factor of heat transfer, from theory, both thermal conductivitys are more close, then heat transfer efficiency is higher, but according to the restriction of prior art, the thermal conductivity of heat-conducting silicone grease is difficult to break through 4W/mK, and this also have impact on the heat dispersion of LED virtually.And when developing the silicone grease with more high thermal conductivity coefficient and running into bottleneck, we should look for another way, attempt to go to attempt the new efficient compound heat sink material of exploitation from the angle of radiator element.
Summary of the invention
For the deficiencies in the prior art part, the object of the present invention is to provide a kind of LED high efficiency composition heat sink material, it is relative to existing radiator element, there is lower thermal conductivity, to make the heat transfer efficiency of itself and typical thermal-conductive silicone grease more close, thus itself and heat-conducting silicone grease can be contributed to work in coordination with and given play to higher heat transfer efficiency.
Technical scheme of the present invention is summarized as follows:
A kind of LED high efficiency composition heat sink material, it comprises the material of following weight part:
Preferably, described LED high efficiency composition heat sink material, wherein, also comprises the vanadium of 6 ~ 7 weight parts.
Preferably, described LED high efficiency composition heat sink material, wherein, also comprises the hafnium of 6 ~ 7 weight parts.
Preferably, described LED high efficiency composition heat sink material, wherein, also comprises the silicon oxide of 2 ~ 3 weight parts.
Preferably, described LED high efficiency composition heat sink material, wherein, also comprises the boron oxide of 2 ~ 3 weight parts.
Preferably, described LED high efficiency composition heat sink material, wherein, also comprises the arsenic oxide arsenoxide of 2 ~ 3 weight parts.
Preferably, described LED high efficiency composition heat sink material, wherein, also comprises the Neodymium trioxide of 2 ~ 3 weight parts.
The invention has the beneficial effects as follows: this case is by improving the traditional heat-dissipating sheet material formula of LED field heat transmission and optimize, it is made to be provided with lower thermal conductivity, to make the thermal conductivity of itself and typical thermal-conductive silicone grease more close, thus can be contributed to it and heat-conducting silicone grease coordinated has given play to higher heat transfer efficiency.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
This case proposes the LED high efficiency composition heat sink material of an embodiment, and it comprises the material of following weight part:
Generally believe in prior art that the thermal conductivity of fin material its heat dispersion larger is better, and only from radiator element itself, this viewpoint is right, but when radiator element is applied in electronic devices and components, especially time in great power LED, the heat dispersion of himself is often subject to the limitation of many factors, that is, the heat dispersion of fin material is high also useless, because the thermal conductivity contacting the medium-heat-conducting silicone grease for conducting heat with it is lower, it constrains the heat conduction of heat sink material, that is, the heat dispersion of heat sink material is greatly wasted, heat sink material not needs so high thermal conductivity, the thermal conductivity of suitable size is only had to match with heat-conducting silicone grease better, work in coordination with and given play to better heat transfer efficiency.But, the thermal conductivity only reducing heat sink material neither terms of settlement, because although the thermal conductivity of thermal conductivity and silicone grease is near, but the heat that great power LED produces is not conducted fast and effectively, therefore, while reduction heat sink material thermal conductivity, also should increase " heat accumulation " ability of heat sink material self, although can not be shed soon to make heat, but at least can temporarily be stored in heat sink material body, with avoid LED heating element because of gathering of heat temperature too high, cause the minimizing in work-ing life.
Research finds, to reduce the thermal conductivity of heat sink material, have more than is that the content correspondingly reducing heat radiating metal just can realize, because the relation of the content of heat radiating metal and thermal conductivity is nonlinear, even in a certain interval range, not be correlated with in forward, if the thermal storage performance of heat sink material will be taken into account again, then more there is uncertainty to the selection of heat sink material formula.It is main body that aluminium is chosen in this case, aluminium is also one of more common heat radiating metal, by being mixed into its oxide form in aluminium, reach dilution effect, the reduction of heat sink conducts heat coefficient can be caused, but only with a kind of thinner of zinc oxide, that very finite sum is faint to the reduction of thermal conductivity, and, the reduction of thermal conductivity has uncertainty, in other words, can not be reached the effect reducing thermal conductivity further by the amount increasing zinc oxide, zinc oxide is also nonlinear on the impact of thermal conductivity.But after adding a small amount of beryllium, this nonlinear relationship can be made to obtain minor betterment, meanwhile, more amazing, the combination of beryllium and zinc oxide makes heat sink material be provided with certain heat storage capacity, but this heat storage capacity is still more limited.Certainly, it should be noted that, the effect of beryllium is here not the thermal conductivity increasing radiator element, although beryllium also has faint heat conductivility, thus, the addition of beryllium should be defined, otherwise will cause the out of control of heat sink material thermal conductivity.The effect of cobalt has 2 points: the thermal storage performance 1) increasing heat sink material further, but this is only limitted to the situation that there is zinc oxide and beryllium in formula; 2) reduce the thermal conductivity of heat sink material further, but the fluctuation of the usage quantity of cobalt can't cause the significantly change of thermal conductivity, therefore, cobalt can stablize the thermal conductivity of firmly heat sink material in the interval range of local.But the usage quantity of cobalt is not linear with thermal storage performance, therefore, in general, the addition of each material in above-mentioned formula should be limited.
On the basis of above-described embodiment, also can preferably include the vanadium of 6 ~ 7 weight parts.The heat storage capacity of above-described embodiment is still relatively general, if desired increases its thermal storage performance further, also needs to carry out modification.Vanadium is a kind of proper metallic substance, it is obvious to the lifting of heat sink material thermal storage performance, fortunately, the interpolation of vanadium is not broken above-mentioned formula and is balanced the suppression of thermal conductivity, and thermal conductivity still can be maintained at a lower level simultaneously; Composition during vanadium is not found to fill a prescription with other produces synergistic effect, and this also makes the interpolation of vanadium relatively free.
On the basis of above-described embodiment, also can preferably include the hafnium of 6 ~ 7 weight parts.On the basis of above-mentioned formula, hafnium can reduce the thermal conductivity of heat sink material further, but its addition is only limitted to this interval range of 6 ~ 7 weight parts, and meanwhile, hafnium also finds to produce synergistic effect with vanadium, for increasing the thermal storage performance of heat sink material.
On the basis of above-described embodiment, also can preferably include the silicon oxide of 2 ~ 3 weight parts.The effect of silicon oxide is the heat accumulation time increasing heat sink material, also do not have enough time to prevent heat to be conducted, just return to LED components and parts, in other words, silicon oxide can increase the time of heat sink material store heat, and the length of this time is very important for the effect of heat accumulation, this will directly affect the radiating effect of LED heating element.
On the basis of above-described embodiment, also can preferably include the boron oxide of 2 ~ 3 weight parts.The effect of boron oxide produces with silicon oxide to act synergistically, the common heat accumulation time of improving heat sink material.
On the basis of above-described embodiment, also can preferably include the arsenic oxide arsenoxide of 2 ~ 3 weight parts.Although the thermal conductivity of heat sink material reduces, but in fact its thermal conductivity is still far above the thermal conductivity of heat-conducting silicone grease, therefore, when conducting heat between both heat conductors that difference is larger, there is the energy level barrier that conducts heat, this barrier can extend the time of heat transfer to a certain extent, and the effect of arsenic oxide arsenoxide is exactly reduce this barrier, to improve the rate of heat transfer between heat sink material and heat-conducting silicone grease.
On the basis of above-described embodiment, also can preferably include the Neodymium trioxide of 2 ~ 3 weight parts.The effect of Neodymium trioxide is combined with arsenic oxide arsenoxide to produce synergistic effect, improve the rate of heat transfer between heat sink material and heat-conducting silicone grease further, but under the prerequisite not having arsenic oxide arsenoxide, Neodymium trioxide do not have castering action to rate of heat transfer.Therefore, the addition of Neodymium trioxide should be defined.
Table one lists concrete composition and the performance perameter thereof of the composite heat dissipation material containing different ingredients of embodiment 1-8:
Table one
Table two lists concrete composition and the performance perameter thereof of the composite heat dissipation material containing different ingredients of embodiment 9-14:
Table two
Table three lists concrete composition and the performance perameter thereof of the composite heat dissipation material containing different ingredients of comparative example 1-8:
Table three
Table four lists concrete composition and the performance perameter thereof of the composite heat dissipation material containing different ingredients of comparative example 9-14:
Table four
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and shown here embodiment.
Claims (7)
1. a LED high efficiency composition heat sink material, it comprises the material of following weight part:
2. LED high efficiency composition heat sink material according to claim 1, is characterized in that, also comprise the vanadium of 6 ~ 7 weight parts.
3. LED high efficiency composition heat sink material according to claim 2, is characterized in that, also comprise the hafnium of 6 ~ 7 weight parts.
4. LED high efficiency composition heat sink material according to claim 3, is characterized in that, also comprise the silicon oxide of 2 ~ 3 weight parts.
5. LED high efficiency composition heat sink material according to claim 4, is characterized in that, also comprise the boron oxide of 2 ~ 3 weight parts.
6. LED high efficiency composition heat sink material according to claim 5, is characterized in that, also comprise the arsenic oxide arsenoxide of 2 ~ 3 weight parts.
7. LED high efficiency composition heat sink material according to claim 6, is characterized in that, also comprise the Neodymium trioxide of 2 ~ 3 weight parts.
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| CN201510478124.5A CN105088020A (en) | 2015-08-07 | 2015-08-07 | Efficient composite heat dissipation material for LEDs |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1572460A (en) * | 1976-09-01 | 1980-07-30 | Watanabe H | Light metal matrix composite materials reinforced silicon carbide fibres and a method for prducing said composite materials |
| CN102260810A (en) * | 2010-05-24 | 2011-11-30 | 薛洪春 | Novel light emitting diode (LED) radiator base material |
| CN102586659A (en) * | 2011-01-06 | 2012-07-18 | 盐城生态之光照明科技有限公司 | High-efficient radiator material for high-power LED (light-emitting diode) lighting lamp |
| CN103898373A (en) * | 2014-02-28 | 2014-07-02 | 昆山东大智汇技术咨询有限公司 | Preparation method of base material for heat sink of LED (light-emitting diode) component |
-
2015
- 2015-08-07 CN CN201510478124.5A patent/CN105088020A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1572460A (en) * | 1976-09-01 | 1980-07-30 | Watanabe H | Light metal matrix composite materials reinforced silicon carbide fibres and a method for prducing said composite materials |
| CN102260810A (en) * | 2010-05-24 | 2011-11-30 | 薛洪春 | Novel light emitting diode (LED) radiator base material |
| CN102586659A (en) * | 2011-01-06 | 2012-07-18 | 盐城生态之光照明科技有限公司 | High-efficient radiator material for high-power LED (light-emitting diode) lighting lamp |
| CN103898373A (en) * | 2014-02-28 | 2014-07-02 | 昆山东大智汇技术咨询有限公司 | Preparation method of base material for heat sink of LED (light-emitting diode) component |
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Application publication date: 20151125 |
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