How to measure emissivity of hot (~1000 centigrade) objects

[M_1]

I want to measure the emissivity (or more correctly the absorbtivity) in the wavelength range 1 - 10 micrometer of very hot (~1000 degrees Celcius) ceramic materials. At room temperature this is typically done using an FTIR spectrometer with a gold coated integrating sphere. But for very hot objects the spectrometer would burn! Any ideas of how such emissivity measurement can be performed in a practical, yet accurate, way? I have access to varius furnaces.

 

[berkeman]

I did a google search on IR Thermometer High Temperature, and got some good hits. Here is the hit list:

https://www.google.com/search?q=ir+thermometer+high+temperature&ie=utf-8&oe=utf-8&client=firefox-b-1

The one from Omega near the top of the list claims it measures up to 1800C...