Phase Equilibria in Thallium Based Superconducting Films

Information

• NSF Award
• 8960605

Owner

• Superconductor Technologies, Inc.

• Award Id

  8960605

• Award Effective Date

  1/1/1990 - 35 years ago

• Award Expiration Date

  9/30/1990 - 34 years ago

• Award Amount

  $ 49,989.00

• Award Instrument

  Standard Grant

Phase equilibria in the thallium superconducting system will be measured. The goal is to understand the complex solid-liquid- vapor equilibria that govern crystal growth of the thallium based family of superconductors. This study will involve exposure of films and powder mixtures of known composition to controlled overpressures of thallous oxide and oxygen vapor at high temperature (600 - 950 C) followed by quenching. The composition and microstructure of quenched samples will be examined to identify the equilibrium high temperature phases. In this manner the liquidus and solidus temperatures, equilibrium overpressures, and stable phases will be determined in those regions of composition that are important for thin film and crystal growth. Additional information on phase changes will be gained by differential thermal analysis (DTA) using sealed gold ampoules to control thallium volatility.

• Program Officer

  Darryl G. Gorman

• Min Amd Letter Date

  12/7/1989 - 35 years ago

• Max Amd Letter Date

  12/7/1989 - 35 years ago

• ARRA Amount

• Name

  SUPERCONDUCTOR TECHNOLOGIES INC

• City

  SANTA BARBARA

• State

  CA

• Country

  United States

• Address

  460 WARD DRIVE

• Postal Code

  931112310

• Phone Number

  8056837646

• First Name

  McDonald

• Last Name

  Robinson

• Email Address

  mac-robinson@LSRL.com

• Start Date

  1/1/1990 12:00:00 AM