Ceramic granules with high UV opacity and high solar reflectance
AssigneeShijiazhuang Nikka Mintech Co., Ltd.
InventorsZhijie Li, Hongwei Lu
Life of this patent
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Abstract
The invention relates to ceramic granules with a high UV opacity and high solar reflectance, which is produced by forming a calcined clay mineral powder into green body and re-calcining, featured with a water absorption of 15-35%; ≥97% crystalline content and 90-100% UV opacity. The invention further relates to a method for preparing ceramic granules with a high UV opacity and high solar reflectance and the use thereof for reflectance-improving application on building surface for the purpose of energy conservation.
Claims16
Ceramic granules having a high UV opacity and high solar reflectance, produced by forming a calcined clay mineral powder and re-calcining, wherein the ceramic granules are characterized by:
- 15-35% water absorption;
- ≥97% crystalline content;
- 90-100% UV opacity;
- and
- a solar reflectance of between 82% and 90%.
Ceramic granules having a high UV opacity and high solar reflectance, produced by forming a calcined clay mineral powder and re-calcining, wherein the ceramic granules are characterized by:
- 15-35% water absorption;
- ≥97% crystalline content;
- 90-100% UV opacity;
- and
- a solar reflectance of from 75% to 85% when being applied to asphalt substrate at a coverage of 90% or more.
Ceramic granules having a high UV opacity and high solar reflectance, produced by forming a calcined clay mineral powder and re-calcining, wherein the ceramic granules are characterized by:
- 15-35% water absorption;
- ≥97% crystalline content;
- 90-100% UV opacity;
- and
- a solar reflectance of between 80% and 90% when being applied to the surface of a polyurethane foam substrate at a coverage of 90% or more.
A method for the preparation of ceramic granules having a high UV opacity and high solar reflectance, comprising the steps of:
- a) providing a calcined clay powder as raw material;
- b) mixing the raw material with a certain proportion of water and forming the raw material into a green body;
- c) calcining the green body at temperature of 1100-1400° C.;
- and
- d) crushing the calcined material to obtain the ceramic granules, wherein the ceramic granules are characterized by:
- 15-35% water absorption;
- ≥97% crystalline content;
- 90-100% UV opacity;
- and
- a solar reflectance of between 82% and 90%.
Dependencies are inferred from the claim text.