NL7104263A - Luminous materials - contng alkaline earth silicates with - apatite crystal structure for use in low-pressure mercury vapour - Google Patents

Luminous materials - contng alkaline earth silicates with - apatite crystal structure for use in low-pressure mercury vapour

Info

Publication number
NL7104263A
NL7104263A NL7104263A NL7104263A NL7104263A NL 7104263 A NL7104263 A NL 7104263A NL 7104263 A NL7104263 A NL 7104263A NL 7104263 A NL7104263 A NL 7104263A NL 7104263 A NL7104263 A NL 7104263A
Authority
NL
Netherlands
Prior art keywords
alkaline earth
pressure mercury
mercury vapour
contng
low
Prior art date
Application number
NL7104263A
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 filed Critical
Priority to NL7104263A priority Critical patent/NL7104263A/en
Priority to AU27674/71A priority patent/AU2767471A/en
Priority to DE19712118531 priority patent/DE2118531A1/en
Priority to BE765967A priority patent/BE765967A/en
Priority to FR7113934A priority patent/FR2089918A5/en
Priority to CA110,803A priority patent/CA953902A/en
Publication of NL7104263A publication Critical patent/NL7104263A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7707—Germanates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/77062—Silicates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7709—Phosphates
    • C09K11/771—Phosphates with alkaline earth metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

The luminous materials consists of silicates of one or more alkaline earth metals and lanthanum and for yttrium, of formula Mea+y, Meb-y(SiO4)6-y-p(PO4)y(GeO4)pOx;Aq in which MeII is at least one of Ca, Sr, Ba and Mg, up to 50 mol.% of which may be replaced by Zn and for Cd, MeIII is La and/or Y and A is an activator from the group Sb, Pb, Sn, Sb, and Mn, which replaces an equivalent amount of MeII and for MeIII. The following conditions apply:- a + 1.56 = 12 + x; 0 = x =2; 0 = y =4.5; 0 = p =4.5 y + p =4.5; 0.05 =9 =0.8; 4/3 = b/a =8; if y = O, then 2 = b/a =8; if a =2 then a + b =8.66 ; if a =2 then a + b =10; and if a + b =9 and x = O then y =1.5. The materials show high absorption and maximum excitation in the spectral region around 254 nn abd hence give higher light yields when used with a low pressure mercury vapour discharge source.
NL7104263A 1970-04-21 1971-03-31 Luminous materials - contng alkaline earth silicates with - apatite crystal structure for use in low-pressure mercury vapour NL7104263A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL7104263A NL7104263A (en) 1971-03-31 1971-03-31 Luminous materials - contng alkaline earth silicates with - apatite crystal structure for use in low-pressure mercury vapour
AU27674/71A AU2767471A (en) 1970-04-21 1971-04-15 Luminescent screen
DE19712118531 DE2118531A1 (en) 1970-04-21 1971-04-16 Fluorescent
BE765967A BE765967A (en) 1970-04-21 1971-04-19 LUMINESCENT SCREEN
FR7113934A FR2089918A5 (en) 1970-04-21 1971-04-20 Luminous materials - contng alkaline earth silicates with - apatite crystal structure for use in low-pressure mercury vapour
CA110,803A CA953902A (en) 1970-04-21 1971-04-20 Luminescent screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7104263A NL7104263A (en) 1971-03-31 1971-03-31 Luminous materials - contng alkaline earth silicates with - apatite crystal structure for use in low-pressure mercury vapour

Publications (1)

Publication Number Publication Date
NL7104263A true NL7104263A (en) 1972-10-03

Family

ID=19812807

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7104263A NL7104263A (en) 1970-04-21 1971-03-31 Luminous materials - contng alkaline earth silicates with - apatite crystal structure for use in low-pressure mercury vapour

Country Status (1)

Country Link
NL (1) NL7104263A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052398A1 (en) * 1980-11-14 1982-05-26 Koninklijke Philips Electronics N.V. Luminescent screen and low-pressure mercury vapour discharge lamp comprising such a screen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052398A1 (en) * 1980-11-14 1982-05-26 Koninklijke Philips Electronics N.V. Luminescent screen and low-pressure mercury vapour discharge lamp comprising such a screen

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