Hotend with ceramic parts
December 23, 2012 11:17PM
Hi Everyone,

I wanted to share my developments up to now using a ceramic heat issolator(also called the nozzle holder) to see if this would work.

If your interested please check out my article on it:


Re: Hotend with ceramic parts
January 03, 2013 08:09PM
Cool job using the ceramic. Do you think you could remove the need for PTFE if the inside was polished or finished with some sort of glaze?
Re: Hotend with ceramic parts
January 04, 2013 03:19PM
When I first started building a 3D printer I looked at several materials to make the hot end insulator from, but settled for the time being on PEEK. However, your explorations have got me looking at one that I considered before - cuttlefish bone.

I have just tried out cuttlefish bone for it's thermal properties and was mightily impressed: I set up a block of cuttlefish bone 25mm thick with a 25mm deep hole 12.5 mm from the bottom surface and a type K thermocouple in the hole. A similar block of expanded polystyrene was made. Both blocks were put on a heated bulld stage whcih was then brought up to 100 degrees over a period on 30 minutes. The temperature in the polystyrene rose by 50 degrees over this time, but only by 38 degrees in the cuttlefish bone.

At the same time as this trial, I put a 800 degree F (426 C) soldering iron on another block of cuttlefish bone - after half an hour there was a little discolouration, but no deformation - and the heated surface could be touched immefiately.

Let's face it, cuttlefish bone is mechanically quite wimpy, but perhaps a shell of Kapton would make it a contender.

Re: Hotend with ceramic parts
January 09, 2013 12:54PM
Hi jzatopa,

so yesterday i got a new batch of nozzle holders, check out the link: http://i.imgur.com/deeoH.jpg

you cannot see it on the picture, but its a version with some precise polished ID, so hopefully testing goes well.

my latest design i want to shoot for is an 100% ceramic hotend: http://1.bp.blogspot.com/-ETE5LSZNx1A/UOlJDfBUaVI/AAAAAAAACxw/f34uD68deMs/s1600/100procentceramic.png

with a 0.5mm orfice. hope this will work for me smiling smiley


Edited 1 time(s). Last edit at 01/09/2013 12:58PM by hp_.
Re: Hotend with ceramic parts
January 21, 2013 01:43AM
Really hope this works out. It is such an elegant design. And it will not require ABS to be used for the mount. spinning smiley sticking its tongue out

Perhaps part of the problem you are seeing is that the heat chamber (brass) is too short and so the filament does not have enough time to heat and melt properly. Just a thought.
Re: Hotend with ceramic parts
February 24, 2013 08:25PM
Hi Everyone,

I just wanted to mention that i'm now printing without a ptfe liner in the ceramic hotend. printing with 3mm PLA fillament.

the new ceramic holder(ID=3.2mm) was extra polished upto an ID of 3.4mm

checkout the youtube clip below:

and image:

the Letter R printed really nice, I got it from thingiverse.

I've used a stronger motor here and plus the polished ceramic piece made this happen!
more testing will be done of-course..

Re: Hotend with ceramic parts
April 09, 2013 12:11AM
Great project!

Any updates?
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