Temperature induced emissivity reversibly variable material

Abstract

The invention relates to a reversibly changing material with temperature emittance used for air-conditioning type construction materials, which is prepared from La2O3, SrCO3, Mn3O4, Na2O, K2O and CaO of a finite weigh proportion through burning, first in 850-1100 deg. C air for 5-15 hrs, and in 1150-1250 deg. C air for 10-20 hrs, the material exhibits low emittance property at low-temperature, thus diminishing thermal transpiration on the object surface, when temperature arises, it exhibits high emissivity property, thus increasing thermal transpiration on the object surface, the two different properties can vary reversibly with the temperature.

Description

technical field

[0001] The invention belongs to the field of material science and engineering technology, and specifically relates to a temperature-induced emissivity reversible change material for air-conditioning building materials, which can be used for building exterior wall coatings, cement-based plastering materials, etc., and can also be used for vehicles, ships, large storage Tanks, large steel structures, daily necessities, military camouflage, aerospace thermal control coatings, etc. technical background

[0002] Warm in winter and cool in summer, the house has been the dream pursued by human beings since ancient times, because it is an important aspect of human beings' basic survival needs of "food and clothing". However, the real world is often cold in winter and hot in summer. On the one hand, the incident angle of the sun on the ground changes greatly in winter and summer. On the other hand, the solar energy absorption rate and thermal emissivity of building ma...

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