Evaluation of selected chemical processes for production of low-cost silicon (Phase III). Fifteenth quarterly progress report, April 1-June 30, 1979 Metadata

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Title

  • Main Title Evaluation of selected chemical processes for production of low-cost silicon (Phase III). Fifteenth quarterly progress report, April 1-June 30, 1979

Creator

  • Author: Blocher, J.M. Jr.
    Creator Type: Personal
  • Author: Browning, M.F.
    Creator Type: Personal

Publisher

  • Name: Battelle Memorial Institute. Columbus Laboratories.
    Place of Publication: Ohio
    Additional Info: Battelle Columbus Labs., OH (USA)

Date

  • Creation: 1979-08-15

Language

  • English

Description

  • Content Description: Progress has been made during this quarter on the assembly of the Process Development Unit (PDU) consisting of four of the critical components of the 50 MT/year Experimental Process System Development Unit (EPSDU) for the production of granular semiconductor-grade silicon by the zinc vapor reduction of silicon tetrachloride in a fluidized bed of seed particles. The target operation date of October 1, 1979, still appears attainable. An experimental wetted-wall condenser, about 1/10 the size of the PDU/EPSDU design was operated to demonstrate that recirculated liquid zinc chloride can indeed be used to wash down the condensed by-product of the fluidized-bed reactor containing finely divided solid zinc and some silicon dust. The temperature distribution proved to be more critical than anticipated but the condenser now appears to be operable. Some improvement in condensation efficiency is desirable, however. Procedures were established for safe handling of SiCl/sub 4/ leaks and spills from the EPSDU and PDU. Preparations are being made to conduct zinc vaporization experiments in that portion of the PDU before operation of the entire PDU is initiated.
  • Physical Description: 18 pages

Subject

  • Keyword: Research Programs
  • Keyword: Elements
  • Keyword: Electrolytic Cells
  • Keyword: Solar Cells
  • STI Subject Categories: 36 Materials Science
  • Keyword: Zinc Chlorides
  • Keyword: Direct Energy Converters
  • Keyword: Efficiency
  • Keyword: Vapor Condensers
  • Keyword: Cleaning
  • Keyword: Semimetals
  • Keyword: Temperature Distribution
  • Keyword: Photovoltaic Cells
  • Keyword: Washing
  • Keyword: Production
  • Keyword: Silicon Chlorides
  • Keyword: Zinc Compounds
  • Keyword: Processing
  • Keyword: Silicon
  • STI Subject Categories: 14 Solar Energy
  • Keyword: Silicon Solar Cells
  • Keyword: Photoelectric Cells
  • Keyword: Silicon Compounds
  • Keyword: Halogen Compounds
  • Keyword: Cost
  • STI Subject Categories: 360601 -- Other Materials-- Preparation & Manufacture
  • Keyword: Design
  • Keyword: Chlorine Compounds
  • Keyword: Chlorides
  • Keyword: Zinc Halides 140501* -- Solar Energy Conversion-- Photovoltaic Conversion
  • Keyword: Halides
  • Keyword: Fluidized Bed
  • Keyword: Condensers
  • Keyword: Leaks

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

  • Report No.: DOE/JPL/954339-15
  • Grant Number: NAS-7-100-954339
  • DOI: 10.2172/5848896
  • Office of Scientific & Technical Information Report Number: 5848896
  • Archival Resource Key: ark:/67531/metadc1096828

Note

  • Display Note: Dep. NTIS, PC A02/MF A01.
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