GB965345A - Improvements in or relating to quartz crystals - Google Patents

Improvements in or relating to quartz crystals

Info

Publication number
GB965345A
GB965345A GB43193/62A GB4319362A GB965345A GB 965345 A GB965345 A GB 965345A GB 43193/62 A GB43193/62 A GB 43193/62A GB 4319362 A GB4319362 A GB 4319362A GB 965345 A GB965345 A GB 965345A
Authority
GB
United Kingdom
Prior art keywords
seeds
lithium
crystals
nutrient
moles
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
GB43193/62A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB965345A publication Critical patent/GB965345A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/16—Oxides
    • C30B29/18—Quartz

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Silicon Compounds (AREA)

Abstract

<PICT:0965345/C1/1> Synthetic quartz containing 10-1000 p.p.m. of lithium is grown on seeds 46 from an aqueous solution in a pressure vessel 40, seeds 46 being separated from nutrient silica crystals 46a by a baffle 47. One seed is z-minor cut and the other basal cut. The aqueous solution contains 0.2-5 moles/1. of sodium hydroxide or a sodium salt and 0.01-1 moles/1. of lithium hydroxide or a lithium salt, and occupies 60-90% of the free space in the pressure vessel. The temperature of the solution in the neighbourhood of the seeds is 300-573 DEG C., and the difference in temperature between the seeds and the nutrient crystals is 15-70 DEG C. The solution is preferably above its critical pressure. The nutrient crystals may have a mesh size of 4-6 (U.S. standard). The growth rate may be 44 mils/ day. The sodium salt may be the carbonate or silicate. The lithium salt may be the nitrate, borate, carbonate, formate, oxalate, phosphate, silicate, sulphate, fluoride, iodide, chloride, or bromide.
GB43193/62A 1961-12-20 1962-11-15 Improvements in or relating to quartz crystals Expired GB965345A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16071961A 1961-12-20 1961-12-20

Publications (1)

Publication Number Publication Date
GB965345A true GB965345A (en) 1964-07-29

Family

ID=22578132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43193/62A Expired GB965345A (en) 1961-12-20 1962-11-15 Improvements in or relating to quartz crystals

Country Status (4)

Country Link
DE (1) DE1190443B (en)
GB (1) GB965345A (en)
NL (1) NL140165B (en)
SE (1) SE304979B (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB793891A (en) * 1955-03-03 1958-04-23 Clevite Corp Quartz crystal

Also Published As

Publication number Publication date
NL140165B (en) 1973-11-15
SE304979B (en) 1968-10-14
DE1190443B (en) 1965-04-08

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