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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 (pcm) 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 pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. 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 pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub. 10 figures.
Inventors:
Issue Date:
OSTI Identifier:
5438370
Assignee:
Univ. of Dayton, Dayton, OH (United States) PTO; EDB-94-046206
Patent Number(s):
US 5254380; A
Application Number:
PPN: US 8-048324
Contract Number:
FG03-86SF16308
Resource Relation:
Patent File Date: 17 Mar 1993
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; PHASE CHANGE MATERIALS; MIXING; USES; SILICA; CONCENTRATION RATIO; PARTICLE SIZE; THERMAL INSULATION; CHALCOGENIDES; MATERIALS; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; SILICON COMPOUNDS; SILICON OXIDES; SIZE; 360600* - Other Materials