Is anyone aware of a material that emits heat very quickly

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Discussion Overview

The discussion revolves around identifying materials that can rapidly cool from high temperatures (220°C) to a safe touch temperature (approximately 29°C) within a few seconds. Participants explore various materials, particularly metals and ceramics, that exhibit low heat storage capacity or high heat emission properties, suitable for specific applications in a normal indoor environment.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about materials that can cool quickly from high temperatures, suggesting a need for low heat storage or high heat emission properties.
  • Another participant mentions space shuttle tiles as a potential option, noting their ability to be handled shortly after being heated.
  • It is suggested that materials with a large surface to volume ratio, such as thin or sponge-like materials, may also be effective.
  • A participant shares personal experience with aluminum foil, indicating it can be handled shortly after use in an oven.
  • Aerogel is proposed as a suitable material, although its fragility is noted as a limitation.
  • A participant clarifies their intention to use the material in a way that it emits heat only when a switch is on, requiring it to be safe to touch shortly after being turned off.
  • The idea of using a high heat capacity material in conjunction with a heat-emitting surface plate is introduced, along with a desire for a comprehensive index of materials based on thermal properties.

Areas of Agreement / Disagreement

Participants present multiple competing views and suggestions regarding suitable materials, with no consensus reached on a single solution or approach.

Contextual Notes

Participants express a need for specific thermal properties and applications, but limitations such as material fragility and the absence of a comprehensive index of thermal properties are acknowledged.

Who May Find This Useful

Individuals interested in materials science, thermal management, or engineering applications requiring rapid heat dissipation may find this discussion relevant.

Kyle Harris
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Hi and thanks for reading.

Is anyone aware of any material which can cool from 220°C, to a safe to touch temperature within a few seconds. I guess I am looking for something with a low ability to store heat. or very good at emitting heat. Possibly metal or ceramics.

It would be heated to about 180–220 °Celsius, ideally quickly by contact with a heat element or plate.
id estimate a safe to touch temperature is 29° C

In a normal indoor environment. No vacuum, no fans or specific airflow etc.

Maybe you know of an index or database of materials and their thermal properties?

thanks for the help

kyle
 
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Space shuttle tiles?
 
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Anything sufficiently thin or sponge-like. A large surface to volume ratio is great.
Bad heat conductance is useful as well. The space shuttle tiles can be picked up at the edges seconds after they were glowing hot.

Any other requirements for the material? What is its purpose?
 
I sometimes bake or warm stuff up in the oven on a sheet of aluminum foil. I have yet to pick it up with anything except bare hands.
 
Aerogel would meet that need, but it's extremely fragile.
 
Hi guys first off thanks for the replies, I am looking into your suggestions in detail.

To further elaborate, i want to use this material to emit heat only when a switch is on, but when off it needs to be safe to touch within seconds.

I figure one of your suggestions can make a surface plate
something with a high heat capacity can then be brought into contact with the plate to rapidly warm it up.
and just as quickly uncoupling the heat source should allow the plate to rapidly cool.
I figured there would be a "periodic table" esq index somewhere with materials heat capacity/how quickly it emits etc.
im still searchingThank you gents.
 

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