Investigation on the Formation of Needle Frost. II,
Abstract
The report selects different types of easily-accessible colloids and tests to see whether they had any effect on the formation of needle frost. For example, about 20 different types including silicic anhydride gel, active carbon powder, dye, agar-agar, gelatin, soap gel, albumin are used. Test results are divided into those having an effect on the generation of needle frost, and those which did not. However, an interesting common phenomenon occurred in all of these substances when water was added and they were frozen, regardless of whether they had any influence on the production of needle frost. When they were frozen and ice was produced, the water accumulated and formed large crystals. For this reason we set aside the scattered particles. For example, clay forms mutual layers with the clay which had not yet frozen with ice. In the case of agar-agar, we obtained the same phenomenon from gelidium jelly as we do when making agar-agar. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1970
- Accession Number
- AD0874906
Entities
People
- Michi Fujita
Organizations
- Cold Regions Research and Engineering Laboratory