Magnesium oxide powder for calrod heaters
Magnesium oxide powder for calrod heaters
(OP)
What grade of MgO powder is used in electrical hearers like calrod or cartridge heaters and does anybody know a supplier who could sell a few Kg.
I am looking for a bulk powder which would have good thermal conductivity at temperatures 500-800C. Must be granular to fill up cavity in test appartus and stable in air.
I am sure liquid metal or molten salt would be better, however I wish to avoid liquids for the moment.
Would powdered metal like iron filings be suitable or would there be a risk of rapid oxidation at elevated temperatures?
Many thanks
I am looking for a bulk powder which would have good thermal conductivity at temperatures 500-800C. Must be granular to fill up cavity in test appartus and stable in air.
I am sure liquid metal or molten salt would be better, however I wish to avoid liquids for the moment.
Would powdered metal like iron filings be suitable or would there be a risk of rapid oxidation at elevated temperatures?
Many thanks





RE: Magnesium oxide powder for calrod heaters
http://www.fishersci.com/ecomm/servlet/fsproductde...
Iron will oxidize readily at 800 degrees C in air, so I would look at stainless steel instead. Fisher offers 2 kg of grade 316 powder for 290.16 USD.