silicon

Question, anyone know the melting point of silicone ?

REDWOOD said:

Question, anyone know the melting point of silicone ?

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Dont know about general but you can get one that can withstand heat and used instead of fire cement on solid fuel stoves.

REDWOOD said:

Question, anyone know the melting point of silicone ?

Click to expand...

Try this link, may help
http://en.wikipedia.org/wiki/Silicone_rubber

REDWOOD said:

Question, anyone know the melting point of silicone ?

Click to expand...

LOL what you up to now?

Pure Silicon (an element) melts at about 1414C.

Silicones are a vast range of compounds with dramatically different properties …
Take a look at http://www.dowcorning.com/content/discover/discoverchem/

Dow corning eh - I remember many years ago feeling the collar of one of the research scientists at the 'plastic t!t' factory in Barry as it was known locally

Was it only their collar you felt?

VEG said:

LOL what you up to now?

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It is a good heat insulator and I use to coat exhaust heat shields for racing cars so I was thinking if I coated the underside of my oxalic acid vaporiser it would stop it burning the mesh on the omf but I needed to know what temperature it would withstand without burning

Tom Bick said:

Dont know about general but you can get one that can withstand heat and used instead of fire cement on solid fuel stoves.

Click to expand...

Thanks Tom, just had a look and it's good for 250C, more than enough for what I need it for

Silicon cooking utensils go in the oven, I have used it on boat engines as a seal and it is still going strong. I have used ordinary silicon on the flu of my woodburning stove and it is better than than the heat resistant stuff that sets hard and then flakes off. I don't think you will have a problem!
E

REDWOOD said:

Question, anyone know the melting point of silicone ?

Click to expand...

You might be better attaching a mat cut out of something like this ...

http://www.ebay.co.uk/itm/Silicon-R...arden_Kitchen_Cookware_GL&hash=item5d49010631

Ha yes good idea and you can buy them from the £ shop, I supose it will have to be stuck on with silicon though

REDWOOD said:

Ha yes good idea and you can buy them from the £ shop, I supose it will have to be stuck on with silicon though

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Yep ... or a couple of holes in the 'mat' and a cable tie to keep it in position ? It's just going to slide in and out of the entrance so it won't matter if it slides about a bit .. or, if you added a 'button' to the leading edge of your vapouriser then you could have two cable ties to hold it in place ?

Wouldn't a bit of wire be better than a cable tie?

BeeJoyful said:

Wouldn't a bit of wire be better than a cable tie?

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Heat transfer with wire to the plastic mesh floor .. what he's trying to avoid is damaging the mesh .. and yes wire would be better if it was not plastic coated mesh. Cable ties should do the job though ....

pargyle said:

You might be better attaching a mat cut out of something like this ...

http://www.ebay.co.uk/itm/Silicon-R...arden_Kitchen_Cookware_GL&hash=item5d49010631

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That sort of silicone doesn't insulate though, does it. Try taking a silicone dish out of the oven without gloves on.
I use a flat silicone baking tray on top of the Rayburn to protect the surface where the kettle sits when I'm not actually boiling it. It is hot!!

Basically as per Erichalfbee.

As usual, some posting on the forum seem not to know the difference between the words 'withstand' and 'insulate'. They do not mean the same, by any stroke of the imagination.


Silicon dioxide is sand, so plenty of the element around in many places.

Silicone oil is clearly a liquid at ambient temperature and is the base for beat conducting grease/compounds used between susceptible electronic components and heat sinks, for heat transfer from solar thermal collector heat pipes to a water manifold, in temperature measuring situations (for good thermal contact between item and transducer)

Cooking utensils are just higher molecular mass compounds, basically.

PIR withstands 150c and a Excellent insulator , Stainless wires and thin walled tubes wthstand much higher temperatures and are reasonable insulators along the axis from a combination of geometry and material.

Make a Stainless wire support above a foil covered PIR base. The stainless protects the PIR from 150+ the PIR protects plastic from 40+

This is the product I use for heat shields, I should have read what it said on the tin.
http://www.ebay.co.uk/itm/1-X-CLEAR-INSTANT-GASKET-100ml-TUBE-ENGINEERING-GRADE-300-/251582834237

Some woven glass tape would do the job - comes in rolls for DIY boat-building - or nick one of the corners off a fire extinguisher blanket.
Another source would be one of those mats that plumbers use to stop their blowlamps from setting the joists of unsuspecting customers alight.

To stick this stuff to anything - nothing beats Gun-Gum exhaust repair compound - except perhaps JB Weld, which I use when fabricating custom OA evaporators. JB Weld is good for 260 C (500 F) continuously, or 300 C (572 F) for 'short periods' (unspecified).

LJ

Oh - and to pre-empt criticism from the pedant - insulation is provided by air between the glass strands. That's how these materials resist heat.