Graphite furnace can be used. Interior and electrodes made of graphite.

Dear Khaled Chawraba,

Intumescent paint protects from fire, but creates black spot.

I need such insulating material that is not discoloured by heat.

Thanks

N Das

Dear Dr. Nityananda Das,

For such high-temperature radiation shields made of Mo or other refractory metals or graphite, better be used.

Good luck with this task.

Ori

Dear Khaled,

You can, but be aware that at 1600 C the alumina fiber sinter and the thermal conductivity will increase and you'll lose heat. Goos luck

Graphite.

Dear Sampath Suranjan Salins and Sarat Chandran C .

Thanks for your reply .

So, I can use graphite walls to make a high temperature furnace.

Best Wishes

N Das

Sure, graphite will be the best option. However, it need to be noted that while working you need to create vacuum till 300-350C followed by slow purging of argon (inert gas). Presence of moisture or traces of oxygen can destroy the furnace (heating element)

Dear Sarath Chandran C ,

Thanks for the clear discussion.

Can you please tell me the degree of vacuum and the pressure of Argon needed ?

Actuality I want to design a Furnace .

Thanks a lot.

N Das

Dear Nityananda Das,

You have not indicated what materials you intend to heat treat. Please make sure they do not change composition under vacuum, e.g. oxides or nitrides.

Good luck,

Ori

Dear Ori Yeheskel,

Actually my work is mostly related to formation of different composite materials for study of electric and magnetic properties.

One of these is YBCO , a high Tc Superconducting Material which is to be formed by Y2O3, BaCO3 and CuO.

This needs comparatively low temperature ( 950⁰C).

Similarly, Strontium Lanthanum manganate and some other materials with different ferroelectric, para electric properties and phase transitions.

For different materials the temperature is different .

I request you to give some suggestions .

Thanks

N Das