CN104923794A - Production process of high-temperature resistant insulation mirror plate - Google Patents
Production process of high-temperature resistant insulation mirror plate Download PDFInfo
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- CN104923794A CN104923794A CN201510267183.8A CN201510267183A CN104923794A CN 104923794 A CN104923794 A CN 104923794A CN 201510267183 A CN201510267183 A CN 201510267183A CN 104923794 A CN104923794 A CN 104923794A
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Abstract
The invention discloses a production process of a high-temperature resistant insulation mirror plate. The production process comprises the steps of: (S1) performing the sand blasting treatment for a steel plate; (S2) dipping the steel plate in activated liquid, and drying; (S3) brushing paint on the surface of the steel plate; (S4) putting the steel plate coated with the paint under an ultraviolet lamp for irradiating 3-5 min; (S5) sintering; and (S6) polishing; the paint comprises 40-42 parts of silicon oxide, 25-27 parts of aluminum oxide, 20-22 parts of zinc oxide, 14-16 parts of neodymium oxide, 2-4 parts of nickel oxide, 2-4 parts of strontium oxide and 200 parts of water; and the activated liquid comprises 14-16 parts of citric acid, 10-12 parts of tartaric acid, 6-8 parts of oxalic acid, 2-4 parts of chlorogenic acid, 2-4 parts of acetic acid, 2-4 parts of phosphorus acid, 0.2-0.4 part of nitric acid, 0.3-0.5 part of amido propylamine dioleate, and 100 parts of water. The mirror plate produced by the process can realize high-frequency use in hot pressing, no dilatation and no sinking.
Description
Technical field
The present invention relates to a kind of production technology of insulation board, be specifically related to the production technology that a kind of Surface coating has the high-temperature insulation runner plate of modified coating.
Background technology
When the main body base material on manufacturing line road plate (PCB), need to use electric press that materials different for multilayer is carried out pressing, the operation principle of this electric press is by the processed tacky resin material of Copper Foil (or aluminium foil) conductive heater, and by applying certain pressure, multilayer material is pressure bonded to not a half hour, thus obtained board substrate, and in use electric press bonding processes, for cost consideration, single stitching operation often needs the multi-disc of pressing simultaneously board substrate, and in order to make multi-disc board substrate when pressing, be not affected each other, need them superimposed, and insert a kind of special insulation board between which, it has insulation, heat transfer, the effect supporting and be separated, this special insulation board with superelevation flatness is called runner plate.
Runner plate and the maximum difference of common insulation board are exactly that its surface has a kind of special coating, the performance of this coating on runner plate has great impact, in process for pressing, very high to the performance requirement of runner plate, electric press is when operating, both heat of high temperature (being greater than 300 DEG C) had been produced, there is again very strong pressure (being greater than 50MPa), this just needs runner plate to possess outstanding resistance to hot press performance, namely runner plate needs to have very high limit tolerable temperature and limit tolerance pressure, and, more weight is, the surface of runner plate still must can keep flat smooth very after repeatedly hot pressing, surface is depression not, there is not breathing, and also cannot realize this requirement in the prior art at present, after the runner plate of prior art generally about can use about 150 times at normal temperatures, its surface just starts to occur depression, runner plate is caused to lose efficacy, and at high temperature also only can use and just lost efficacy for about 60 times.And be that its technique of preparation does not also carry out depth optimization in another reason that prior art cannot realize this requirement, comprise: undesirable to the pre-treatment of base material, stronger stress and lower surface smoothness can be produced, have a strong impact on breathing rate and the result of use of runner plate; Ideal effect is not obtained to the improvement of formulation for coating material yet; The sintering process of coating is not effectively improved.
Summary of the invention
For the deficiencies in the prior art part, the object of the present invention is to provide a kind of production technology of high-temperature insulation runner plate, the runner plate gone out by this explained hereafter can realize the use ensureing high frequency time when the hot pressing of HTHP power, not breathing, surfacing is wear-resisting, does not cave in.
Technical scheme of the present invention is summarized as follows:
A production technology for high-temperature insulation runner plate, comprising:
S1: using steel plate as base material, carries out blasting treatment to steel plate;
S2: described steel plate is immersed activating solution 10 ~ 15min, with post-drying;
S3: paint brush is applied to described surface of steel plate;
S4: irradiate 3 ~ 5min under the steel plate scribbling coating being placed in the uviol lamp of 25W;
S5: sinter under steel plate being placed in high temperature;
S6: polishing;
Wherein, in S3, described coating comprises following material:
In S2, described activating solution comprises:
Preferably, the production technology of described high-temperature insulation runner plate, wherein, described coating also comprises the lanthana of 2 ~ 4 weight portions.
Preferably, the production technology of described high-temperature insulation runner plate, wherein, described coating also comprises the tantalum oxide of 2 ~ 4 weight portions.
Preferably, the production technology of described high-temperature insulation runner plate, wherein, described coating also comprises the hafnium boride of 2 ~ 4 weight portions.
Preferably, the production technology of described high-temperature insulation runner plate, wherein, in S5, sintering condition is: in atmosphere of inert gases, from 0 ~ 1h, is at the uniform velocity warming up to 200 DEG C; 1h ~ 1.5h, constant temperature is at 200 DEG C; 1.5h ~ 3h, is at the uniform velocity warming up to 700 DEG C from 200 DEG C; 3h ~ 5h, constant temperature is at 700 DEG C; After 5h, naturally cool to 25 DEG C.
Preferably, the production technology of described high-temperature insulation runner plate, wherein, when described steel plate is by ultra violet lamp, the relative humidity of environment residing for steel plate is 75 ± 2%.
Preferably, the production technology of described high-temperature insulation runner plate, wherein, the thermal linear expansion coefficient of described steel plate is 12 ~ 16ppm/ DEG C.
Preferably, the production technology of described high-temperature insulation runner plate, wherein, between S3 and S4, also comprises freezing 5 ~ 6min at the steel plate scribbling coating is placed in-2 ~ 0 DEG C.
Preferably, the production technology of described high-temperature insulation runner plate, wherein, the abrasive material of sandblasting is the blend of the epoxy resin comprising the Brown Alundum of 35 ~ 45wt%, the diamond of 40 ~ 50wt% and 5 ~ 25wt%, the granularity of described abrasive material is 350 ~ 400 orders, and blasting pressure is 1.3 ~ 1.5MPa.
Preferably, the production technology of described high-temperature insulation runner plate, wherein, described abrasive material is the blend of the epoxy resin comprising the Brown Alundum of 40wt%, the diamond of 45wt% and 15wt%; The number-average molecular weight of described epoxy resin is 60000 ~ 65000g/mol.
The invention has the beneficial effects as follows: 1) adopt blasting craft and pickling activation as pre-treatment, broken away from prior art and suppressed undesirable to steel plate stress, surface roughness and flatness control the negative effects such as improper; 2) improved coating with silica, aluminium oxide, zinc oxide and neodymia for core, by introducing the multiple oxide with synergistic effect, effectively improve the bulk strength of runner plate coating when hot pressing, surface smoothness, resistance to hot pressing and wear resistance, thus the baneful influence that the breathing that effectively can overcome runner plate entirety brings himself result of use and service life; 3) drawn by great many of experiments, adopt segmented ladder-elevating temperature, effectively can suppress the internal stress of coating, obtain optimal coating performance; 4) before sintering freezing pretreatment is carried out to coating, effectively in the distribution of surface of steel plate, to reduce coating stress, the adhesion of coating and steel plate can be increased by adjusting coating; 5) before sintering coating is carried out slightly aging, the distribution of coating can be made more smooth, stronger with the adhesion of steel plate, can significantly promote the weather-proof of coating and resistance to elevated temperatures again simultaneously.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, can implement according to this with reference to description word to make those skilled in the art.
This case proposes the production technology of the high-temperature insulation runner plate of an embodiment, comprising:
S1: using steel plate as base material, carries out blasting treatment to steel plate;
S2: steel plate is immersed activating solution 10 ~ 15min, with post-drying;
S3: paint brush is applied to surface of steel plate;
S4: irradiate 3 ~ 5min under the steel plate scribbling coating being placed in the uviol lamp of 25W;
S5: sinter under steel plate being placed in high temperature;
S6: polishing;
Wherein, in S3, coating comprises following material:
In S2, activating solution comprises:
In coating, material therefor can preferably select nano level powder or micron powder.
Experimental data shows, after adopting the uviol lamp of low wattage to carry out preaging to coating, the distribution of coating can be made more smooth, stronger with the adhesion of steel plate, significantly can promote the intensity of coating, resistance to hot pressing and weather resistance again simultaneously, improve the service life of coating.But the irradiation time of uviol lamp should be defined, if the time is less than 3min, then cannot produces a desired effect, coating performance is not promoted; If the time is greater than 5min, can cause overaging phenomenon again, when the later stage calcines, surface is easy to crack.
After sandblasting, steel plate is immersed activating solution, activating solution is the acidic liquid of Compositional type, and its formula kind and addition should be restricted, because the requirement of activating solution is higher, not metal impurities such as divided burr when it had both needed to remove sandblasting, can not corrode steel plate body again, meanwhile, it can not change the surface energy of steel plate, namely additionally do not increase the surface stress of steel plate, thus can ensure that the runner plate obtained has low breathing rate.The amino propylamine dioleate added in activating solution is a kind of surfactant, abundant experimental results finds, conventional surfactant or dispersant cannot be applicable to this activating solution system, they all easily produce the phenomenons such as cohesion or sedimentation, and only find that amino propylamine dioleate can realize the effect of homogeneous phase dispersion.
As another embodiment of this case, wherein, the lanthana of 2 ~ 4 weight portions is also comprised in coating.Lanthana can improve case hardness and the resistance to elevated temperatures of coating, but it should be noted that the addition of lanthana should be limited, if the addition of lanthana is less than 2 weight portions, then its synergistic effect be cannot activate, hardness and the resistance to elevated temperatures of coating effectively cannot be improved; If the addition of lanthana is greater than 4 weight portions, then lanthana can accelerate again the bleed rate of moisture when calcining, and increases the surface stress of coating, thus coating is become fragile, and weatherability reduces, and easy to crack or depression, has had a strong impact on the service life of coating.
As the another embodiment of this case, wherein, the tantalum oxide of 2 ~ 4 weight portions is also comprised in coating.Experiment finds, tantalum oxide can reduce runner plate coating to the susceptibility of the temperature difference and pressure reduction and expansion amplitude, thus the breathing rate of runner plate can be reduced, but it is same, the addition of tantalum oxide also must be limited, if the addition of tantalum oxide is less than 2 weight portions, then cannot activate its synergistic effect, effectively cannot suppress the breathing rate of runner plate, thus make runner plate just occur that coating surface is wrinkling, have cut or depression for 50 times afterwards in hot pressing; If the addition of tantalum oxide is greater than 4 weight portions, then tantalum oxide easily aggravates the shrinkage factor of coating when calcining, thus forms crackle at coating surface, have impact on structural stability and the yields of runner plate.
As the another embodiment of this case, wherein, the hafnium boride of 2 ~ 4 weight portions is also comprised in coating, it can control the bleed rate of fine paint powders moisture when calcining, thus the excessive stress of coat inside can be improved, improve resistance to compression and the resistance to elevated temperatures of coating, moreover, hafnium boride also can suppress coat inside to the responsive amplitude of the breathing of the temperature difference, pressure reduction, thus makes coating surface more stable more durable.But experimental data shows too, the addition of hafnium boride should be limited, and inappropriate addition can form negative effect on the contrary.
As the another embodiment of this case, wherein, in S5, sintering condition is: in atmosphere of inert gases, from 0 ~ 1h, is at the uniform velocity warming up to 200 DEG C; 1h ~ 1.5h, constant temperature is at 200 DEG C; 1.5h ~ 3h, is at the uniform velocity warming up to 700 DEG C from 200 DEG C; 3h ~ 5h, constant temperature is at 700 DEG C; After 5h, naturally cool to 25 DEG C.Research finds, sintering temperature of the prior art and time cannot coordinate with the coating of this case and make the coating of this case play optimum efficiency, and therefore this case adopts the way of ladder-elevating temperature, overcomes coating this technological deficiency of unstable properties after sintering.When just sintering, from this time period of 0 ~ 1h, be at the uniform velocity warming up to 200 DEG C, this is the activation temperature of coating, and can be used for increases coating to the bonding stability of steel plate; Subsequently in this time period of 1h ~ 1.5h, constant temperature is at 200 DEG C, and this is the stress for eliminating coating inside when starting to condense, to ensure that the coating after sintering does not have obvious breathing phenomenon; Subsequently in this time period of 1.5h ~ 3h, 700 DEG C are at the uniform velocity warming up to from 200 DEG C, this is dehydration and the sinter molding stage of coating, the slow advantage heating up sintering is that molding rate is moderate, both effectively have adjusted the surface rigidity of coating, can ensure that again the function of each additive can be not suppressed each other, thus the coating of optimum performance can be obtained; Subsequently in this time period of 3h ~ 5h, constant temperature is at 700 DEG C, and continue heat preservation sintering at these elevated temperatures, the volatile impurity in coating will thoroughly be eliminated, and coating will by complete sizing, the effective guarantee due character of coating; Stop heating after 5h, naturally cool to 25 DEG C, being the fracture toughness in order to regulate coating, bursting to prevent coating from answering quenching.But it is emphasized that the time of above-mentioned intensification, temperature control, the size of temperature all should be limited, and departs from these preferred number ranges, and the final performance of coating will be affected.
In addition, the material category of adding in formulation for coating material and addition also should be limited, after departing from above-mentioned preferred scope and kind, the performance of runner plate will be had a strong impact on, further, the technique of above-mentioned sintering is also no longer applicable to the formulation for coating material after changing, therefore, formulation for coating material and sintering process are organic wholes, and both complement each other.
As the another embodiment of this case, wherein, when steel plate is by ultra violet lamp, residing for steel plate, the relative humidity of environment is preferably 75 ± 2%.Found by research, when preaging, restriction is carried out to the relative humidity in the environment residing for coating and can obtain more preferably effect.The relative humidity of 75 ± 2% effectively can suppress the shrinkage amplitude of coating surface when preaging, thus can obtain in addition to the above-described advantages, also has higher surface smoothness.
As the another embodiment of this case, wherein, the thermal linear expansion coefficient of steel plate is 12 ~ 16ppm/ DEG C.Because runner plate is mainly for the manufacture of pcb board, and an important main material in pcb board is exactly copper coin, the thermal linear expansion coefficient of copper is 16.7ppm/ DEG C, therefore in order to prevent copper coin from the wrinkling or fracture of extruding occurring when hot pressing, the thermal linear expansion coefficient of runner plate should as far as possible close to the thermal linear expansion coefficient of copper in theory, but unexpected discovery by experiment, true really not so, when hot pressing, high temperature realizes heating function by energising, when high temperature is energized, the thermal linear expansion coefficient generation deviation of different metals, different metal materials, its degree departed from is also different, therefore for the technical scheme of this case, select linear thermal coefficient of expansion is the steel plate of 16.1 ~ 17ppm/ DEG C is not optimal selection, the thermal linear expansion coefficient of steel plate should be preferably 12 ~ 16ppm/ DEG C, more preferably 13 ~ 15ppm/ DEG C, most preferably 14ppm/ DEG C.The material composition of invar is very complicated, and market has different models, different concrete compositions has different thermal linear expansion coefficients, and this case, without the need to making restriction to the concrete composition of steel plate, only need limit its thermal linear expansion coefficient.If the thermal linear expansion coefficient of steel plate is less than 12ppm/ DEG C, then can cause the surface wrinkling of the pcb board contacted with runner plate; If the thermal linear expansion coefficient of steel plate is greater than 16ppm/ DEG C, then when hot pressing, the surface of the pcb board contacted with runner plate there will be crackle.
As the another embodiment of this case, wherein, between S3 and S4, also comprise freezing 5 ~ 6min at the steel plate scribbling coating is placed in-2 ~ 0 DEG C.This case finds breakthroughly, after coating is brushed, before preaging, the freezing a bit of time under being placed on low temperature environment, can contribute to improving coating wear resistance after sintering and surface strength, the breathing phenomenon of runner plate can be suppressed to a certain extent, but freezing temperature range and cooling time should be strictly limited simultaneously, if temperature is lower than-2 DEG C, then the coating surface after sintering is easy to crack; If temperature is higher than 0 DEG C, both cannot forming obvious lifting to coating performance, again because adding an invalid link in process, indirectly adding production cost.If cooling time is long, then easily causing coating at initial stage of sintering, just there is fracture in its surface; If cooling time is too short, also cannot produces coating performance and effectively promote.
As the another embodiment of this case, wherein, the abrasive material of sandblasting is the blend of Brown Alundum, diamond and epoxy resin, and the granularity of abrasive material is 350 ~ 400 orders, and blasting pressure is 1.3 ~ 1.5MPa.In the present case, the object of sandblasting reduces the sex change of steel plate, reduces steel plate stress, therefore, the abrasive material of single kind cannot meet this requirement, needs to adopt compound abrasive material, experiment finds, adopt compound abrasive material compared with after the blasting by abrasives of employing single type, the breathing rate of obtained runner plate reduces at least 5%, and, the granularity of abrasive material also should be limited, if the granularity of abrasive material is less than 350 orders, then cause the roughness after sandblasting excessive, thus have impact on coating be sintered after surface smoothness; If the granularity of abrasive material is greater than 400 orders, then effectively cannot remove stress, and the combination stability of coating and steel plate can be affected.In addition, the pressure of sandblasting also should be limited, if pressure is less than 1.3MPa, then effectively cannot carry out unstressed sandblasting to surface of steel plate, causes the breathing amplitude of steel plate to raise; If pressure is greater than 1.5MPa, then too high pressure can make the surface texture of abrasive material to steel plate damage, and have impact on the adhesion of coating and steel plate.
More preferably, in above-described embodiment, abrasive material preferably can comprise the blend of the epoxy resin of the Brown Alundum of 35 ~ 45wt%, the diamond of 40 ~ 50wt% and 5 ~ 25wt%, most preferably comprises the blend of the epoxy resin of the Brown Alundum of 40wt%, the diamond of 45wt% and 15wt%.Further, the number-average molecular weight of epoxy resin also should be defined, and is preferably 60000 ~ 65000g/mol.
Table one is listed the main technologic parameters of different embodiment and is adopted this technique to obtain the performance parameter of runner plate:
Table one
Table two lists the main technologic parameters of different comparative example and the performance parameter of obtained runner plate thereof:
Table two
Table three is listed with the main technique formula of embodiment 1 for standard, the main technologic parameters of comparative example formed in conjunction with different sintering conditions and the performance parameter of obtained runner plate thereof:
Table three
Although embodiment of the present invention are open as above, but it is not restricted to listed in description 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.
Claims (10)
1. a production technology for high-temperature insulation runner plate, comprising:
S1: using steel plate as base material, carries out blasting treatment to steel plate;
S2: described steel plate is immersed activating solution 10 ~ 15min, with post-drying;
S3: paint brush is applied to described surface of steel plate;
S4: irradiate 3 ~ 5min under the steel plate scribbling coating being placed in the uviol lamp of 25W;
S5: sinter under steel plate being placed in high temperature;
S6: polishing;
Wherein, in S3, described coating comprises following material:
In S2, described activating solution comprises:
2. the production technology of high-temperature insulation runner plate according to claim 1, is characterized in that, described coating also comprises the lanthana of 2 ~ 4 weight portions.
3. the production technology of high-temperature insulation runner plate according to claim 1, is characterized in that, described coating also comprises the tantalum oxide of 2 ~ 4 weight portions.
4. the production technology of high-temperature insulation runner plate according to claim 1, is characterized in that, described coating also comprises the hafnium boride of 2 ~ 4 weight portions.
5. the production technology of high-temperature insulation runner plate according to claim 1, is characterized in that, in S5, sintering condition is: in atmosphere of inert gases, from 0 ~ 1h, is at the uniform velocity warming up to 200 DEG C; 1h ~ 1.5h, constant temperature is at 200 DEG C; 1.5h ~ 3h, is at the uniform velocity warming up to 700 DEG C from 200 DEG C; 3h ~ 5h, constant temperature is at 700 DEG C; After 5h, naturally cool to 25 DEG C.
6. the production technology of high-temperature insulation runner plate according to claim 1, is characterized in that, when described steel plate is by ultra violet lamp, the relative humidity of environment residing for steel plate is 75 ± 2%.
7. the production technology of high-temperature insulation runner plate according to claim 1, is characterized in that, the thermal linear expansion coefficient of described steel plate is 12 ~ 16ppm/ DEG C.
8. the production technology of high-temperature insulation runner plate according to claim 1, is characterized in that, between S3 and S4, also comprises freezing 5 ~ 6min at the steel plate scribbling coating is placed in-2 ~ 0 DEG C.
9. the production technology of high-temperature insulation runner plate according to claim 1, it is characterized in that, the abrasive material of sandblasting is the blend of the epoxy resin comprising the Brown Alundum of 35 ~ 45wt%, the diamond of 40 ~ 50wt% and 5 ~ 25wt%, the granularity of described abrasive material is 350 ~ 400 orders, and blasting pressure is 1.3 ~ 1.5MPa.
10. the production technology of high-temperature insulation runner plate according to claim 9, is characterized in that, described abrasive material is the blend of the epoxy resin comprising the Brown Alundum of 40wt%, the diamond of 45wt% and 15wt%; The number-average molecular weight of described epoxy resin is 60000 ~ 65000g/mol.
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| CN105555026A (en) * | 2015-12-10 | 2016-05-04 | 苏州市嘉明机械制造有限公司 | Wear-resistant insulating mirror plate manufacturing technique based on technology of impregnation |
| CN106833260A (en) * | 2016-12-26 | 2017-06-13 | 安徽宝恒新材料科技有限公司 | A kind of insulated metal product surface processing method |
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