<![CDATA[SoliForum - 3D Printing Community — Pyroceram Glass for heated bed]]> https://www.soliforum.com/topic/11029/pyroceram-glass-for-heated-bed/ Thu, 07 May 2015 20:28:11 +0000 PunBB <![CDATA[Re: Pyroceram Glass for heated bed]]> https://www.soliforum.com/post/95143/#p95143 I'll make some phone calls on my way home from work today, see if my surplus supply people can locate some more sheets of fireplace glass I can share with the community. If I can get a hold of some, I will let you all know big_smile

]]> Thu, 07 May 2015 20:28:11 +0000 https://www.soliforum.com/post/95143/#p95143 <![CDATA[Re: Pyroceram Glass for heated bed]]> https://www.soliforum.com/post/95137/#p95137 Neoceram is interesting stuff.

It has similar hardness to pyroceram.  It does have poorer thermal conductivity (similar to borosilicate glass).

But it actually has a negative thermal expansion coefficient.  Meaning it shrinks under heat.  It's very small (-0.4 E-6).


Could make for parts that pop off the bed themselves.

]]> Thu, 07 May 2015 19:50:38 +0000 https://www.soliforum.com/post/95137/#p95137 <![CDATA[Re: Pyroceram Glass for heated bed]]> https://www.soliforum.com/post/95086/#p95086 I use that kind of glass, actually. I got it for a couple bucks a sheet at a surplus store. never had any problems with it.

]]> Thu, 07 May 2015 11:21:37 +0000 https://www.soliforum.com/post/95086/#p95086 <![CDATA[Re: Pyroceram Glass for heated bed]]> https://www.soliforum.com/post/95077/#p95077 It looks like someone else has paved the way and used this material:

http://devdonkey.blogspot.com/2013/04/c … prusa.html


Also, OneDayGlass sells it online:

https://www.onedayglass.com/order-online/

]]> Thu, 07 May 2015 03:29:30 +0000 https://www.soliforum.com/post/95077/#p95077 <![CDATA[Pyroceram Glass for heated bed]]> https://www.soliforum.com/post/95058/#p95058 So, I was looking at sources for a chipped bed, and called a local glass company looking for "fireplace glass".

They had Pyroceram glass and an 8" x 8" (asked for rough estimate - 3/16" thick) sheet runs $22.


I was looking this stuff up, it seems superior to Borosilicate Glass in every way:

Borosilicate Glass vs Pyroceram Glass
Thermal Conductivity:   1.14 W/mK vs 3.96 W/mK (3X more)
Thermal Expansion:   3.3 E-6 vs 0.30 E-6  (10X less)
Knoop hardness:   470 vs 705 (2X harder)

Knoop hardness is if you take a needle (diamond) and tried to impact the glass, how far will it go.  Higher the number the less it will indent.

$20 isn't bad, and the stuff seems pretty awesome.  It's sold by several other names (re-branded).


Most importantly, the stuff has wicked thermal shock abilities.  It's designed to go from 100 C to 0C in a moment without cracking.


So if you end up replacing your bed under warranty or otherwise, call your local glass companies.

]]> Wed, 06 May 2015 22:09:34 +0000 https://www.soliforum.com/post/95058/#p95058