According to the search results, the thermal conductivity of diatomite thermal insulation brick changes at different temperatures as follows.

I. Indicators:

Temperature (℃): 300 10

Thermal conductivity (w/(m k)): 0.13-0.20.

Temperature (℃): 350 25

Thermal conductivity (w/(m k)) 0.18-0.23

Temperature (℃): 400℃

Thermal conductivity (w/(m k)): 0.13-0.20.

II. Description:

300 10℃: At about 300℃, the thermal conductivity of diatomite thermal insulation brick ranges from 0.13 to 0.20 W/(m k), and the specific value depends on the density of the brick.

350 25℃: At about 350℃, the thermal conductivity ranges from 0.18 to 0.23 w/(m k), which is slightly different among different brands and specifications.

400℃: At 400℃, the thermal conductivity is 0.13-0.20 W/(m k), which is close to the data at 300℃.

III. Summary:

The thermal conductivity of diatomite thermal insulation brick increased slightly with the increase of temperature, but remained at a low level as a whole, showing good thermal insulation performance. Its thermal conductivity does not change much in the range of 300-400℃, which shows that it has stable heat insulation effect in the middle and low temperature range.