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Topic: Advise a material

All greetings. At all I do not know that it. Epoxy tar, most likely. It is necessary with certain characteristics. I know, here many physicists live, and generally clever people (joking apart). It is required that: - that it was possible to flood in the form without preliminary heating; - at hardening, the temperature of mass did not exceed a water boiling point; - the stiffened mass possessed high heat conductivity, the above, the better (in an ideal - copper); - at all enumerated characteristics, the material should be dielectric; - plus to everything, the material should withstand huge pressure deeply; - one more moment, crash-worthiness (as an option). For what it is all it is necessary? In a material will be there is electronics, in a considerable quantity. Should plunge on depth. That occurred, the titanic case filled with lubricating oil, possessing heat conductivity and incompressibility. It is easy to disassemble the case and to get circuits, to replace something. Lubricating oil - dielectric. The temperature in the case will be very high, can reach temperature of boiling of water. The method  temperature tap is necessary. It is clear that the active cooling outside is necessary. What about the case, whether there should be it black and matte that radiated heat is better?

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Re: Advise a material

Hello, komod, you wrote: K> At all I do not know that it. Epoxy tar, most likely. It is necessary with certain characteristics. I know, here many physicists live, and generally clever people (joking apart). Well, heat conductivity of epoxy tar is not so great. Besides, there is no saying, as it withstands the durable stay in sea water under pressure (pressure and heating accelerate chemical processes, and sea water is rather aggressive). K> For what it is all it is necessary? In a material will be there is electronics, in a considerable quantity. Should plunge on depth. That occurred, the titanic case filled with lubricating oil, possessing heat conductivity and incompressibility. It is easy to disassemble the case and to get circuits, to replace something. Lubricating oil - dielectric. The temperature in the case will be very high, can reach temperature of boiling of water. The method  temperature tap is necessary. It is clear that the active cooling outside is necessary. What about the case, whether there should be it black and matte that radiated heat is better? And why not a stainless steel filled with oil? A stainless steel to process, and, in difference from the titan easier, it is chemically inert (the titan, it as aluminum, in itself is very chemically active, but is covered by a thin and strong oxide-coated film, however if a film mechanically to damage, can attack very quickly). It is necessary to let out very accurately only  air, they are compressed, in difference from oil. That to color and dullness as the case will be cooled about water, hardly it has special value. Convection heat conductivity differently above, than heat conductivity through an IR-radiation.

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Re: Advise a material

Pzz> Well, heat conductivity of epoxy tar is not so great. Besides, there is no saying, as it withstands the durable stay in sea water under pressure (pressure and heating accelerate chemical processes, and sea water is rather aggressive). Heard  that it withstands nuclear explosion. But that with  at it  - the fact.

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Re: Advise a material

Hello, Kaifa, you wrote: Pzz>> Well, heat conductivity of epoxy tar is not so great. Besides, there is no saying, as it withstands the durable stay in sea water under pressure (pressure and heating accelerate chemical processes, and sea water is rather aggressive). K> heard  that it withstands nuclear explosion. But that with  at it  - the fact. In what sense withstands? In epicenter of nuclear explosion generally withstands nothing, on big enough distance - withstands any material.  - a piece good, but against the aggressive chemical environment it long does not resist, as well as any other plastic (well, teflon in this sense can is a bit better). Besides, she does not love long influence UF-izljuchenija and long heating to 100C and above - starts to degrade." Long "are days/months, instead of half an hour. Heat conductivity  can be increased a little, crumbling in it of aluminum or copper powder - percent to 50 from volume (and even to 70, it is necessary to look, how much strongly it starts to get denser) but then dielectric properties suffer. And the result can turn out fragile enough, it is necessary to experiment. Certainly, in quality  it is necessary to take the decent modified tar with a hardener, instead of 5-minute glue from tubes. As first approximation it is possible to begin with the Soviet glue , it is rather quite good.

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Re: Advise a material

Hello, komod, you wrote: K> For what it is all it is necessary? In a material will be there is electronics, in a considerable quantity. Should plunge on depth. That occurred, the titanic case filled with lubricating oil, possessing heat conductivity and incompressibility. It is easy to disassemble the case and to get circuits, to replace something. Lubricating oil - dielectric. The temperature in the case will be very high, can reach temperature of boiling of water. The method  temperature tap is necessary. It is clear that the active cooling outside is necessary. What about the case, whether there should be it black and matte that radiated heat is better? What for to you the titanic case, if only temperature of boiling of water? To chips such temperature is not terrible. And where the black case will radiate heat if heat comes outside? You completely would explain the task - in what environment and that plunges. Can to you will throw the thermocouple in your tank enough.

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Re: Advise a material

the polymeric aggregate looks is direct that that is necessary, a question only in availability

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Re: Advise a material

Hello, komod, you wrote: Take paste for smearing of heat sinks and add a few wax! The big pressure is that?

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Re: Advise a material

Hello, komod, you wrote: K> All greetings. K> at all I do not know that it. Epoxy tar, most likely. It is necessary with certain characteristics. I know, here many physicists live, and generally clever people (joking apart). Look at it. On the channel still is. https://www.youtube.com/watch?v=Wamdy_KlQPE

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Re: Advise a material

Hello, Pzz, you wrote: Pzz>>> Well, heat conductivity of epoxy tar is not so great. Besides, there is no saying, as it withstands the durable stay in sea water under pressure (pressure and heating accelerate chemical processes, and sea water is rather aggressive). The epoxy aggregate with water does not react. Absolutely. Therefore for a waterproofing of all on light use epoxy colors and . Pzz> Epoksidka - a piece good, but against the aggressive chemical environment it long does not resist Properties of an epoxy aggregate depend on a hardener. Them now a large quantity different under different tasks. Two offices big are in Peter - http://www.chimexltd.com/catalog/category/806 and Moscow - http://www.epital.ru/ which at retail work. Read bake on products, select under the task and forward. Pzz> As first approximation it is possible to begin with the Soviet glue , it is rather quite good. All Soviet shit has unstable testimonials from of a batch to a batch. Thus all within tolerances, because tolerances monstrous. If to speak about  is a glue, instead of binding or  compound. That from it molded all successively - so it from scarcity of a choice instead of because it so is good earlier. Today it is possible to pay 1000 and to receive 1 compound with the necessary characteristics under the task.

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Re: Advise a material

Hello, marcopolo, you wrote: M> What for to you the titanic case, if only temperature of boiling of water? To chips such temperature is not terrible. Yes you that? Seriously? M> and where the black case will radiate heat if heat comes outside? You though itself understood, what told?

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Re: Advise a material

Hello, Pzz, you wrote: Pzz>... (The titan, it as aluminum, in itself is very chemically active, but is covered by a thin and strong oxide-coated film, however if a film mechanically to damage, can attack very quickly). If it as aluminum, yes. But it is not enough mechanical damage, that corrosion began. In the normal environment on a damage place the new oxide-coated film at once is formed.

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Re: Advise a material

Hello, komod, you wrote: K> If it as aluminum, yes. But it is not enough mechanical damage, that corrosion began. In the normal environment on a damage place the new oxide-coated film at once is formed. Tell it to my aluminum frying pans at which bottoms from washing in the dishwasher grow bare. Perhaps they to you check and obey

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Re: Advise a material

Hello, komod, you wrote: K> At all I do not know that it. Epoxy tar, most likely. Properties  can be changed largely. As aggregate and the most binding (tar). From this that I remember, additives:  oil and  will be as rubber. Nitride of a pine forest and  will be on hardness pig-iron. Can quite be that that is for heat conductivity. Anyway onboard electronics has been made in due time as the assembly in aluminum (?) cases with filling . In that that filling flied was made foam.

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Re: Advise a material

Hello, komod, you wrote: M>> What for to you the titanic case, if only temperature of boiling of water? To chips such temperature is not terrible. K> yes you that? Seriously? Well, even such difficult products as processors are not afraid of it. M>> and where the black case will radiate heat if heat comes outside? K> You though itself understood, what told? Well so specify. Somehow did not think that the boiler will be called by electronics. If you immerse the instrument in oceanic depths convection and heat conductivity on many orders superimpose radiation.

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Re: Advise a material

Hello, Pzz, you wrote: Pzz> Tell it to my aluminum frying pans at which bottoms from washing in the dishwasher grow bare. Perhaps they to you check and obey It from periodic heating, instead of from washing.

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Re: Advise a material

Hello, marcopolo, you wrote: M> Well, even such difficult products as processors are not afraid of it. You generally about what speak? Hundred degrees, critical temperature for , thus it begins  and to fail. It generally a forum of programmers? M> well so specify. Somehow did not think that the boiler will be called by electronics. Whether you  that? What else boiler? From what you took, what outside there is a heating? Heating goes from within and it is necessary to give warmly outside. M> If you immerse the instrument in oceanic depths convection and heat conductivity on many orders superimpose radiation. The instrument should work also in the normal server.

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Re: Advise a material

Hello, komod, you wrote: Pzz>> Tell it to my aluminum frying pans at which bottoms from washing in the dishwasher grow bare. Perhaps they to you check and obey K> It from periodic heating, instead of from washing. Not clearly, from what. There heating not such and big, degrees to 50. But wash long, and thus in the alkaline environment.

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Re: Advise a material

Hello, Pzz, you wrote: Pzz> it is not clear, from what. There heating not such and big, degrees to 50. But wash long, and thus in the alkaline environment. Whether you me  that? Heating on a plate, instead of in the dishwasher.

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Re: Advise a material

Hello, komod, you wrote: Pzz>> it is not clear, from what. There heating not such and big, degrees to 50. But wash long, and thus in the alkaline environment. Whether K> you me  that? Heating on a plate, instead of in the dishwasher. So they grow bare in the course of washing in the dishwasher. You will get it therefrom, and at it all bottom in a gray touch.

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Re: Advise a material

Hello, Pzz, you wrote: Pzz> So they grow bare in the course of washing in the dishwasher. You will get it therefrom, and at it all bottom in a gray touch. Well so it is response of oxide of aluminum with alkali, and you spoke about mechanical damages. And generally it can be a scum, because of hard water.

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Re: Advise a material

Hello, komod, you wrote: Pzz>> So they grow bare in the course of washing in the dishwasher. You will get it therefrom, and at it all bottom in a gray touch. K> well so it is response of oxide of aluminum with alkali, and you spoke about mechanical damages. Well there it was a question of immersing on depth. As in fresh water depth meets infrequently, I assume that water sea. As the titan with sea water reacts, the horse-radish knows it. And whether the oxide-coated film in case of its mechanical damage will be recovered in such environment, too to tell difficultly.

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Re: Advise a material

Hello, c-smile, you wrote: CS> From this that I remember, additives:  oil and  will be as rubber. Some  still recommend a brake liquid for plasticization. On a court yard, it is possible -1 to buy 21 centuries at retail, or a hardener at once with plasticiser for lamination (ht-488/4). If an itch insuperable and hunting in the winter at the negative temperature to mold, it is possible to take hardener Etal-45M. All this  perfectly works with normal   YD-128 at the price of -20 with the same properties, only with predicted quality. And poverty -20, ,  it is necessary to forget as a bad dream and not to recall never.

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Re: Advise a material

Hello, Pzz, you wrote: K>> Well so it is response of oxide of aluminum with alkali, and you spoke about mechanical damages. Pzz> well there it was a question of immersing on depth. As in fresh water depth meets infrequently, I assume that water sea. As the titan with sea water reacts, the horse-radish knows it. And whether the oxide-coated film in case of its mechanical damage will be recovered in such environment, too to tell difficultly. I think, normally reacts. Nuclear-powered submarines already built of the titan, and anything, normally, even till now not broken record of speed installed.