GB1299879A - Improvements in or relating to glass compositions - Google Patents

Improvements in or relating to glass compositions

Info

Publication number
GB1299879A
GB1299879A GB6011669A GB6011669A GB1299879A GB 1299879 A GB1299879 A GB 1299879A GB 6011669 A GB6011669 A GB 6011669A GB 6011669 A GB6011669 A GB 6011669A GB 1299879 A GB1299879 A GB 1299879A
Authority
GB
United Kingdom
Prior art keywords
relating
glass compositions
glass composition
composition
higham
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
GB6011669A
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.)
Pilkington Group Ltd
Original Assignee
Pilkington Brothers 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 Pilkington Brothers Ltd filed Critical Pilkington Brothers Ltd
Priority to GB6011669A priority Critical patent/GB1299879A/en
Priority to DE19702057706 priority patent/DE2057706A1/en
Priority to FR7043437A priority patent/FR2072820A5/fr
Publication of GB1299879A publication Critical patent/GB1299879A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

1299879 Glass composition PILKINGTON BROS Ltd R J PARRY and G A HIGHAM 19 Nov 1970 [9 Dec 1969] 60116/69 Heading C1M A glass composition consists essentially of, in weight per cent, SiO 2 6-9; B 2 O 3 7À5-9À5; GeO 2 1À5; Ta 2 O 5 15-20; La 2 O 3 30-50; ZrO 2 6À5-8; Gd 2 O 3 1-20 and Y 2 O 3 0-5. The glasses produced from this composition are stated to have a refractive index of the order of 1À900 and an Abbe value which increases as the lanthanum is replaced by gadolinium oxide.
GB6011669A 1969-12-09 1969-12-09 Improvements in or relating to glass compositions Expired GB1299879A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB6011669A GB1299879A (en) 1969-12-09 1969-12-09 Improvements in or relating to glass compositions
DE19702057706 DE2057706A1 (en) 1969-12-09 1970-11-17 Optical glass which is stable against devitrification and has a high refractive index of around 1,900 and a relatively low dispersion of around 40 on the basis of lanthanum-tantel oxide
FR7043437A FR2072820A5 (en) 1969-12-09 1970-12-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6011669A GB1299879A (en) 1969-12-09 1969-12-09 Improvements in or relating to glass compositions

Publications (1)

Publication Number Publication Date
GB1299879A true GB1299879A (en) 1972-12-13

Family

ID=10485038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6011669A Expired GB1299879A (en) 1969-12-09 1969-12-09 Improvements in or relating to glass compositions

Country Status (3)

Country Link
DE (1) DE2057706A1 (en)
FR (1) FR2072820A5 (en)
GB (1) GB1299879A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5214607A (en) * 1975-07-24 1977-02-03 Obara Optical Glass Optical glass not containing thorium
US7501369B2 (en) 2000-05-31 2009-03-10 Hoya Corporation Optical glass and process for the production of optical products

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5263920A (en) * 1975-11-25 1977-05-26 Nippon Chemical Ind Optical glass

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5214607A (en) * 1975-07-24 1977-02-03 Obara Optical Glass Optical glass not containing thorium
JPS5342328B2 (en) * 1975-07-24 1978-11-10
US7501369B2 (en) 2000-05-31 2009-03-10 Hoya Corporation Optical glass and process for the production of optical products
DE10126554B4 (en) * 2000-05-31 2016-06-23 Hoya Corp. Optical glass and process for producing optical products

Also Published As

Publication number Publication date
DE2057706A1 (en) 1971-06-09
FR2072820A5 (en) 1971-09-24

Similar Documents

Publication Publication Date Title
GB979193A (en) Optical glasses
GB1416206A (en) Alkali-resistant glass fibres
GB1290528A (en)
GB1436562A (en) Glass
GB1435868A (en) Fluorophosphate glass
GB1399556A (en) Alkali-resistant glass compositions
GB1402555A (en) Fibre reinforced cement composites
GB1475500A (en) Ophthalmic glass compositions
GB1506916A (en) Optical glass
GB1261786A (en) Fluorophosphate glasses
GB1299879A (en) Improvements in or relating to glass compositions
GB1508845A (en) Heat absorbing glasses
GB725206A (en) Optical glass
GB765244A (en) Improvements in or relating to the manufacture of mineral fibres or threads which are stable to weathering, decay, efflorescence or disintegration
GB812576A (en) Improvements in or relating to glass composition
GB746147A (en) Optical glass
GB1233512A (en)
GB1224169A (en) Improvements in or relating to thorium-free optical glass
GB1340586A (en) Optical glass
GB1405717A (en) Optical glass
GB804106A (en) Improvements in or relating to glass compositions
GB1176297A (en) Laser Glass Compositions
GB1255497A (en) Glass compositions
GB1319653A (en) Optical glass
GB1260778A (en) Improvements in or relating to optical glasses with a high refractive index and a strong dispersion

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees