Looks like a far out coating for Fire Brick to increase durability and performance.
http://www.ceramicindustry.com/articles/print/a-refractory-coating-from-outer-space
http://www.dynacote.com/index.cfm
http://realtytimes.com/rtpages/20010719_heat.htm
http://www.ceramicindustry.com/articles/print/a-refractory-coating-from-outer-space
http://www.dynacote.com/index.cfm
http://realtytimes.com/rtpages/20010719_heat.htm