Help finding the right material for non-conductive tubing

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Discussion Overview

The discussion centers on finding a suitable material for a non-conductive, shatter-proof tube that can withstand high temperatures (~250°C) for use in a commercial portable vaporizer. The focus includes material properties, potential alternatives, and specific applications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests machining a tube from ceramic foam as a potential solution.
  • Another proposes winding the heating coil onto a mandrel and using expanding foam for insulation.
  • A participant mentions that if the original glass tube is appropriate, it should withstand the conditions unless there are issues with mounting or heating.
  • Two materials, Pyrex and Gorilla Glass, are proposed by another participant as possible candidates, noting their respective uses and properties.
  • Concerns about shatter resistance of the proposed glass materials are raised, indicating uncertainty about their suitability.

Areas of Agreement / Disagreement

Participants express differing views on the suitability of glass versus alternative materials, with no consensus on the best option for the application. The discussion remains unresolved regarding the optimal choice of material.

Contextual Notes

Limitations include uncertainty about the specific requirements for shatter resistance and the performance of glass materials under high temperatures. The discussion does not clarify the exact conditions that may lead to failure of the glass tube.

Eitanburg
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TL;DR
Hi, I need a tube that will be shatter proof, non conductive for electricity and be a good heat insulator, it need to be rigid and sustained high temperature (~250 c°)
Hi, I need a tube that will be shatter proof, non conductive for electricity and be a good heat insulator, it need to be rigid and sustained high temperature (~250 c°)
 
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For...?
 
Replace a glass tube around the heating element of a vaporizer
 
Eitanburg said:
heating element of a vaporizer
Commercial/industrial/household?
 
Welcome to PF.

Maybe you can machine the tube from a ceramic foam.
Alternatively, wind the heating coil onto a mandrel, then plaster it with an expanding foam, then remove the mandrel.
 
Commercial portable vaporizer, the heating element is similar to a car cigarette lighter
RDT_20230722_1019325336094124505029350.jpg
 
Honestly, if that glass tube is the right kind of glass then it should be able to bear anything what that PCB can. If it shatters or cracks then it's more likely a mounting (or something with the uneven/too fast heating) than material problem.

Are you are thinking about precautions or usage out of the original environment?
 
Two glassy materials come to mind, Pyrex and Gorilla Glass.
Pyrex is used in cookware that goes into the kitchen oven, and Gorilla Glass is that tough glass used to cover the screens of cell phones.

Both are made by Corning Glass, https://www.corning.com

From your photo, a Pyrex test tube or graduated cylinder cut down to size may do the trick. (I don't know about the shatter resistance though.)

Cheers,
Tom
 

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