Report of Investigations 9465: Hexagonal Phase Transformation in the Engineered Scavenger Compound Lithium Titanate

Details

• Journal Article:
  Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 9465
• Personal Author:
  Collins, William K. ; Jong, Bing W. ; Riley, William D.
• Description:
  Engineered scavenger compounds (ESC's) developed by the U.S. Bureau of Mines are a novel class of compounds that selectively can recover a desired element from a solid or molten alloy. Lithium titanate (Li2Ti3O7 or Li2O·3TiO2) is used as an ESC to recover lithium (Li) from aluminum-lithium (AL-Li) alloys. X-ray diffraction measurements have shown that Li2Ti3O7 undergoes a phase change during scavenging from an orthorhombic structure to a hexagonal structure. This change is due to the incorporation of lithium in the matrix of the material and the effect of temperature. Although both phases are metastable, the hexagonal phase that forms during the scavenging of lithium from AL-Li alloys appears to be the more stable phase. Recovering lithium from the ESC by electrodeposition does not cause the structure to revert to the orthorhombic phase. The orthorhombic and the hexagonal structures of Li2Ti3O7 have similar scavenging capacities for lithium. This report proposes a new mechanism for the phase transformation. [Description provided by NIOSH]
• Subjects:
  Lithium Metals Metal Workers Mining Occupational Health Safety
• Keywords:
  Metal-mining; Metal-industry; Metal-compounds; Metallurgy; Metallurgical-processes; Metals
• Source:
  Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 9465, 1993 Jan; :1-11
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Oregon ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  ALRC - Albany Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  16 pdf pages
• NIOSHTIC Number:
  nn:10004057
• NTIS Accession Number:
  PB93-207272
• CAS Registry Number:
  Aluminum (CAS RN 7429-90-5) ; Lithium (CAS RN 7439-93-2) ; Lithium carbonate (Li2CO3) (CAS RN 554-13-2) ; Lithium chloride (CAS RN 7447-41-8) ; Potassium chloride (CAS RN 7447-40-7) ; Titania (CAS RN 13463-67-7)
• Federal Fiscal Year:
  1993
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b23e9cfb7fbf01171f6c36a087eadeb69a103ff2eecba9e7dc6dc9028758e457a05f1b96d3b287f1c2eb75587a2a94f23356dd21cd8892e36f83491de30cfccb
• Download URL:
  https://stacks.cdc.gov/view/cdc/10150/cdc_10150_DS1.pdf
• File Type:
  [PDF - 421.35 KB ]