Ceramic parts

K

kubeek

Well-Known Member

Most Helpful Member

• Aug 26, 2013

• #1

Hi, I need to make a heater element, and the final candidate for the base material is some form of ceramics or porcelain.
Does anyone have any experience with making such thing? The main question for me is what kind of clay or mixture I should use. I need it to be tough like for example ceramic fuses etc, and need it to be non-toxic.

 

alec_t

Well-Known Member

Most Helpful Member

• Aug 26, 2013

• #2

If the temperature you want is below the melting point of glass perhaps you could get a local glass-blower to make a suitable former?

 

K

kubeek

Well-Known Member

Most Helpful Member

• Aug 26, 2013

• #3

I am aiming for ceramics because I want as large thermal capacity and conductivity as I could get, but without electrical conductivity beacuse I plan to use bare nichrome wire to heat it. Also the structure would probably be too complex for glass.
But the point of wanting to try something new might be also a part of it

 

K

KeepItSimpleStupid

Well-Known Member

Most Helpful Member

• Aug 26, 2013

• #4

We mabe lots of high temperature heaters using Boron Nitride. It's VERY easy to machine and very expensive. The highest temperature we needed could melt copper. The heaters were tantalum wire coiled on an aluminum form before use in the boron Nitride. Tantalum foil played a role too. The heaters were used in a vacuum.

There is also machineable ceramic.

 

Joe G

Member

• Aug 26, 2013

• #5

Have you looked into 2 part ceramic paste mixtures?

 

K

kubeek

Well-Known Member

Most Helpful Member

• Aug 26, 2013

• #6

It seems to be consisting of some glue, and I don´t think that would be good at high temperatures, I am aiming for 150-300°C operating temperature.

 

K

KeepItSimpleStupid

Well-Known Member

Most Helpful Member

• Aug 26, 2013

• #7

Some of the stufff we got was from Aremco. Some of their pastes are good to 2000 F. See: https://www.aremco.com/product/a3/

Boron Nitride: The stuff is very easy to cut before sintering. An 10 cm x 10 cm x 10 rod is about $500 here : https://www.aliexpress.com/store/pr...d-Hot-pressed-Pyrolytic/726413_953865083.html Just expensive.

 

Last edited: Aug 26, 2013