GB703606A - Improvements in or relating to methods of purifying germanium - Google Patents

Improvements in or relating to methods of purifying germanium

Info

Publication number
GB703606A
GB703606A GB2272752A GB2272752A GB703606A GB 703606 A GB703606 A GB 703606A GB 2272752 A GB2272752 A GB 2272752A GB 2272752 A GB2272752 A GB 2272752A GB 703606 A GB703606 A GB 703606A
Authority
GB
United Kingdom
Prior art keywords
germanium
relating
methods
heating
purifying germanium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2272752A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB703606A publication Critical patent/GB703606A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B41/00—Obtaining germanium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/14—Tool-holders, i.e. operating tool holders, e.g. burr holders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/06—Tooth grinding or polishing discs; Holders therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Germanium is refined by heating between 1200 DEG C. and 1500 DEG C. in vacuo. In one example, 50 gms. of germanium in a carbon beaker was maintained for 100 minutes at 1300 DEG C. by high frequency heating in a vacuum of 10-5 to 10-4 cms. The germanium was thus heated for some further minutes at 1000 DEG C. in a gas flow of nitrogen with 10 per cent. hydrogen. The germanium is preferably stirred during heating.
GB2272752A 1951-09-13 1952-09-10 Improvements in or relating to methods of purifying germanium Expired GB703606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL163975 1951-09-13

Publications (1)

Publication Number Publication Date
GB703606A true GB703606A (en) 1954-02-03

Family

ID=19750532

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2272752A Expired GB703606A (en) 1951-09-13 1952-09-10 Improvements in or relating to methods of purifying germanium

Country Status (7)

Country Link
BE (1) BE514120A (en)
CH (1) CH311304A (en)
DE (1) DE976458C (en)
ES (1) ES205320A1 (en)
FR (2) FR1062839A (en)
GB (1) GB703606A (en)
NL (2) NL163975B (en)

Also Published As

Publication number Publication date
DE976458C (en) 1963-09-12
FR1062839A (en) 1954-04-27
FR1062889A (en) 1954-04-28
ES205320A1 (en) 1952-11-01
NL83988C (en)
BE514120A (en)
NL163975B (en)
CH311304A (en) 1955-11-30

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