Growth of high {Tc} superconducting fibers using a miniaturized laser-heated float zone process. Progress report, November 6, 1990--December 31, 1991 Metadata

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Title

  • Main Title Growth of high {Tc} superconducting fibers using a miniaturized laser-heated float zone process. Progress report, November 6, 1990--December 31, 1991

Creator

  • Author: Feigelson, R.S.
    Creator Type: Personal
  • Author: Route, R.K.
    Creator Type: Personal
  • Author: DeMattei, R.C.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)
  • Sponsor: National Science Foundation (U.S.)
    Contributor Type: Organization
    Contributor Info: National Science Foundation, Washington, DC (United States)

Publisher

  • Name: Stanford Univ., CA (United States). Center for Materials Research
    Place of Publication: United States

Date

  • Creation: 1991-12-31

Language

  • English

Description

  • Content Description: This report summarizes the progress made on the project ``Growth of High {Tc} Superconducting Fibers Using a Miniaturized Laser-Heated Float Zone Process`` during the 14 month period from Nov. 6, 1990 to Dec. 31, 1991. The studies during this period focused primarily on phase diagram studies, phase relations in the calcium aluminate system and on Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} (BSCCO). Some work was also done on the Advanced Fiber Growing Station. Because of the complicated phase relationships found in the incongruently melting BSCCO system, the incongruently melting CA{sub 3}Al{sub 2}O{sub 6} phase of the calcium oxide-aluminum oxide system was studied as a model material. The data obtained was in agreement with well known solidification theory. Fibers grown from calcium oxide rich sources contained calcium oxide nodules which transported from the melting source interface to the growth interface, while those grown from aluminum oxide rich sources contained continuous inclusions of a divorced eutectic. The melt compositions were also found to follow theoretical predictions. The agreement of this data with the phase diagram and solidification theory demonstrates that phase equilibrium information can be extracted from fiber growth experiments. BSCCO feed rods were made from 12 different compositions. Fibers were grown from these rods and the melts were abruptly quenched which preserves the as-grown 2212 fiber, a glassy frozen melt and the source. A future study of these sections will reveal the phase relationships that exist in the BSCCO system. Melt temperature gradients of 500--1,000 C/cm were measured near the interface in these experiments. During this reporting period, work continued on the mechanical components of the Advanced Fiber Growth Station.
  • Physical Description: 106 p.

Subject

  • Keyword: Research Programs
  • Keyword: Crystallization
  • Keyword: Fibers
  • Keyword: Calcium Oxides
  • Keyword: Strontium Oxides
  • STI Subject Categories: 36 Materials Science
  • Keyword: Phase Studies
  • Keyword: Zone Melting
  • Keyword: Progress Report
  • Keyword: Crystal Growth
  • Keyword: Experimental Data
  • Keyword: High-Tc Superconductors
  • Keyword: Aluminium Oxides
  • Keyword: Copper Oxides
  • Keyword: Bismuth Oxides

Source

  • Other Information: PBD: 31 Dec 1991

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Other: DE96012788
  • Report No.: DOE/ER/13987--T3
  • Grant Number: FG03-89ER13987
  • DOI: 10.2172/266723
  • Office of Scientific & Technical Information Report Number: 266723
  • Archival Resource Key: ark:/67531/metadc668344

Note

  • Display Note: OSTI as DE96012788