# What material can withstand continuous working temperature of 1000 degree Celsius?

I'm designing a block for creating turbulence inside a traditional furnace. I would like to know about a material which is economical and can be put into operation for more than 2 years.

Most industrial furnaces are lined with fire bricks to ensure long operating times at high temperatures. Depending on the properties of the bricks, particularly the grade of the fire clay, temperatures up to 1640 $$\small\sf{^o}$$C can be tolerated.