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Title: Dry powder mixes comprising phase change materials

Free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7[times]10[sup [minus]3] to about 7[times]10[sup [minus]2] microns and the p.c.m. must be added to the silica in an amount of 80 wt. % or less p.c.m. per combined weight of silica and p.c.m. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a p.c.m. material. The silica-p.c.m. mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub.
Inventors:
Issue Date:
OSTI Identifier:
6304987
Assignee:
Univ. of Dayton, Dayton, OH (United States) OAK; EDB-93-120461
Patent Number(s):
US 5211949; A
Application Number:
PPN: US 7-835854
Contract Number:
FG03-86SF16308
Resource Relation:
Patent File Date: 18 Feb 1992
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PHASE CHANGE MATERIALS; USES; CEMENTS; CHEMICAL PROPERTIES; CONCENTRATION RATIO; MIXTURES; PARTICLE SIZE; POWDERS; SILICON OXIDES; SOILS; BUILDING MATERIALS; CHALCOGENIDES; DISPERSIONS; MATERIALS; OXIDES; OXYGEN COMPOUNDS; SILICON COMPOUNDS; SIZE; 320302* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Materials