Enhanced superconductors. Final report

Technical Report · Fri May 01 00:00:00 EDT 1992

OSTI ID:7088633

Olsen, R B

One of the major challenges facing high temperature superconductors is the making of non-brittle materials. Based on the successful discovery of high temperature perovskite superconductors, a new class of superconducting materials is hypothesized. The proposed class will be mechanically tough and may have high critical temperatures. The proposed material will be inexpensive to manufacture and easily formed into wires and bands. The project's research goal was to detect a superconducting transition in a specific material within this proposed new class. Substantial progress was made toward this objective. In Phase I a major milestone, the bulk conversion of a precursor material, was successfully accomplished. The second model precursor polymer, Polychlorofluoroethylene (PCFE), was synthesized for this study. This allowed the possibility of making low defect polyfluoroacetylene. This synthesis route yielded poly(fluoroacetylene) with a significantly lower defect density when compared to HF-eliminated fluoropolymer films. The final phase of this work was directed to synthesis of poly(2,3,5,6-tetrafluoro-para-phenylene vinylene) (PTFPPV). While making significant progress in synthesizing conducting polymers with polar or polarizable groups, this study did not reach its ultimate goal of producing a model compound with all of the necessary chemical properties to test the exciton model of superconductivity.

• Research Organization: Chronos Research Labs., Inc., San Diego, CA (United States)
• OSTI ID: 7088633
• Report Number(s): AD-A-252010/4/XAB; CNN: F49620-89-C-0100
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ORGANIC SUPERCONDUCTORS
CHEMICAL PROPERTIES
RESEARCH PROGRAMS
ACETYLENE
EXCITONS
HIGH-TC SUPERCONDUCTORS
MATHEMATICAL MODELS
PEROVSKITES
POLYMERS
SUPERCONDUCTIVITY
SYNTHESIS
TRANSITION TEMPERATURE
ALKYNES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HYDROCARBONS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
QUASI PARTICLES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
360600* - Other Materials
400201 - Chemical & Physicochemical Properties