High Temperature Cooling Application

Capric and lauric acid mixtures with organic additives were tested and screened for cold storage in high temperature cooling application (32). The organic additives are listed in Table 6.3. 

The phase transition behavior and heat transfer characteristics of a fabricated cold storage ball filled with the self-developed phase change material were investigated. 

White mineral oil (22) Drytech 2035 Superabsorbent material (22) Ethenier -F-UHV Lignocellulosic pulp (17) Favor 953 

Stockhausen GmbH Crosslinked, partially neutralized sodium poly(acrylate) (12) Flexan (Series) National Starch 

World s Best Cat Litter Grain Processing Corp. 

---

Superconductivity The physical state in which all resistance to the flow of direct-current electricity disappears is defined as superconductivity. The Bardeen-Cooper-Schriefer (BCS) theoiy has been reasonably successful in accounting for most of the basic features observed of the superconducting state for low-temperature superconductors (LTS) operating below 23 K. The advent of the ceramic high-temperature superconductors (HTS) by Bednorz and Miller (Z. Phys. B64, 189, 1989) has called for modifications to existing theories which have not been finahzed to date. The massive interest in the new superconductors that can be cooled with liquid nitrogen is just now beginning to make its way into new applications. 

Fluidized-bed CVD was developed in the late 1950s for a specific application the coating of nuclear-fuel particles for high temperature gas-cooled reactors. PI The particles are uranium-thorium carbide coated with pyrolytic carbon and silicon carbide for the purpose of containing the products of nuclear fission. The carbon is obtained from the decomposition of propane (C3H8) or propylene... 

The final anion-deficient fluorite structure type material to mention is 8-Bi203. The formula of this phase makes it surprising that a fluorite structure form exists, but such a structure occurs at high temperatures. The resulting phase is an excellent O2- ion conductor with many potential applications. Unfortunately, the high-temperature form is not maintained when the compound is cooled to room temperature. However, fluorite structure anion-deficient phases of the same type can be prepared by reaction with many other oxides, and these are stable at room temperature. The majority of these materials have a modulated anion substructure (Section... 

---