|
|
Post by boscovius on Nov 27, 2020 20:08:18 GMT -8
I was just reading some of the posts about castables v.s. ceramic fiber. Then had a W.A.I. (wild assed idea) for mixing shredded ceramic fiber with a powdered ceramic refractory cement and using it to cast components for a firebox (double shoebox) I was very interested in using ceramic fiber for my future build, but it's expensive and not as durable as I'd like it to be. Even if you consider coating it with a material like satanite or ceramic fiber cloth.
I'm thinking I could borrow the best from both worlds with this approach. Has anyone tried it?
|
|
|
|
Post by martyn on Nov 28, 2020 4:02:42 GMT -8
I think you should try it out.....
I have had a few goes but it is very difficult to prevent the fibres from clumping tougher .
Although rocket stoves are not exactly a well know every day item, pizza ovens, forges, kilns, Incinerators etc ... are more so, and the major manufacturers must know there is a demand and use for a robust lightweight insulating material.
On that basis I assume it is not an easy product to produce?
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Nov 28, 2020 6:36:28 GMT -8
I was just reading some of the posts about castables v.s. ceramic fiber. Then had a W.A.I. (wild assed idea) for mixing shredded ceramic fiber with a powdered ceramic refractory cement and using it to cast components for a firebox (double shoebox) I was very interested in using ceramic fiber for my future build, but it's expensive and not as durable as I'd like it to be. Even if you consider coating it with a material like satanite or ceramic fiber cloth. I'm thinking I could borrow the best from both worlds with this approach. Has anyone tried it? |
|
|
|
Post by boscovius on Nov 28, 2020 7:25:05 GMT -8
Thanks for the feedback Karl, Martyn. Clumping is definitely a concern of mine. I assumed it would be best to mix everything dry and then saturate the whole mass before mixing. Hard to say without experimenting. Turns out Fiberfrax makes a castable product,so apparently it's doable but I have not yet inquired as to price. I'll update this thread when I get that information and we'll have a better idea if a DIY solution might be more economical. www.unifrax.com/en-uk/product/fiberfrax-castables/ |
|
|
|
Post by martyn on Dec 4, 2020 23:59:54 GMT -8
The main issue i encountered when trying to mix ceramic fibres was the clumping, it is difficult enough to cut into what you think is small pieces but they seem to desperately want to join back together in a mass! Carbon fibre is worth experimenting with the carbon fibres are easy to cut and dont clump when mixing. There are several pizza oven builders using carbon fibre stands in both insulating and dense refactory mixes with good results! I have been experimenting with nano fibres, specifically multi walled carbon nano tubes which are essentially graphene formed into tubes. I have used them in concrete for my supporting slab which needs to be really strong but does not go above 300c I intend to also use them in castable refractory exposed to full rocket stove temperatures as I’ve read a couple of papers that indicate they’ll work well for our temp range! There is a commercial product available but might be hard to find edencrete.com/ |
|
