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Heat Resistant Material


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#1 Nicabbq

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Posted 17 March 2017 - 05:40 PM

I need a reccomendation on a heat resistant material for temp up to 300 degrees. Will be used in solar water heater. Should be readily available and inexpesive.
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#2 John Cuthber

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Posted 17 March 2017 - 07:47 PM

Glass.


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#3 Bender

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Posted 17 March 2017 - 11:06 PM

Steel, aluminum, casting iron, stone...

If you go for glass, I'd recommend pyrex.

 

What shape does it need to have? What are other requirements?


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#4 DrP

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Posted 18 March 2017 - 12:06 PM

What part of your solar water heater do you need this material for?  Heat conductive material is best for housing the pipes - that way any heat absorbed by it from the sun can conduct through the pipes into the water easily. You can insulate the body of the the unit, but heat conductivity is what is needed between the pipes and the heat capture sheet/housing. 

 

The use of 'squashed' copper piping painted black improves the absorption too iirc. Black for obvious reasons (it absorbs the heat), squashed slightly so that a larger surface area of pipe gets incident rays and thus more absorption of energy. 


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#5 fresh

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Posted 28 March 2017 - 02:05 PM

Glass.

how come glass is heat-resistant ? My glass mug was broken in steaming pot.


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#6 DrP

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Posted 28 March 2017 - 03:43 PM

Was it cold when it was put in the steamer? Was it a thin glass mug? The glass here that John suggests would be much thicker and wouldn't be going through fast temperature changes....  extreme temperature changes throughout the year, yes, but slow changes that wouldn't cause it to shatter.


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#7 John Cuthber

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Posted 28 March 2017 - 06:33 PM

how come glass is heat-resistant ? My glass mug was broken in steaming pot.

How hot was the glass when it was made?


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#8 fresh

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Posted 29 March 2017 - 07:33 AM

no need extreme temperature.  

I never challenge steamed eggs with any glassware/porcelain afterwards。

glassware is not heat-resistant, stainless steelware is. 


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#9 DrP

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Posted 29 March 2017 - 07:42 AM

Depends on the glass.


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#10 Bender

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Posted 29 March 2017 - 07:50 AM

The mug probably wasn't borosilicate glass (aka pyrex), which is the kind of glass oven ware or lab equipement is made of.
"Regular" glass is definitely not heat resistent.

But even heat resistent glass isn't as heat resistent as metals.

Edited by Bender, 29 March 2017 - 07:50 AM.

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#11 John Cuthber

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Posted 29 March 2017 - 07:08 PM

The mug probably wasn't borosilicate glass (aka pyrex), which is the kind of glass oven ware or lab equipement is made of.
"Regular" glass is definitely not heat resistent.

But even heat resistent glass isn't as heat resistent as metals.

That rather depends on the metal: ever seen a "mercury in glass" thermometer?


...

glassware is not heat-resistant, ...

A lot of laboratory work shows that you are wrong.


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#12 Bender

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Posted 29 March 2017 - 08:17 PM

That rather depends on the metal: ever seen a "mercury in glass" thermometer?

Why do you ask? Do you think mercury is a common construction material? ;)
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