Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J61/00—Gas-discharge or vapour-discharge lamps
  • H01J61/02—Details
  • H01J61/38—Devices for influencing the colour or wavelength of the light
  • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
  • H01J61/44—Devices characterised by the luminescent material
• • 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 materials, e.g. electroluminescent or chemiluminescent
  • C09K11/08—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials
  • C09K11/74—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials containing arsenic, antimony or bismuth
  • C09K11/75—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony
  • C09K11/76—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony also containing phosphorus and halogen, e.g. halophosphates

Definitions

• This invention relates to alkaline earth fluorophos- phate luminescent materials. More particularly it relates to strontium-calcium fluorapatite phosphors activated with manganese and antimony and to fluorescent lamp incorpora ⁇ ting these phosphor materials.
• alkaline earth halophosphate materials are calcium fluorapatite, calcium fluoro-chlorapatite, calcium chloroapatite, calcium-strontium fluoro-chloro- apatite strontium fluorapatite calcium bromo-chloro- apatite, barium fluorapatite, barium fluorochloroapatite and barium chlorapatite.
• the materials are activated with antimony and manganese. In lieu of antimony, bismuth, tin or lead can be used.
• U.S. Patent 2,965,786 discloses that cadmium can be added to halophosphate of the above formula where M and M are calcium.
• U.S. Patent 3,549,552 discloses calcium fluorochlo ⁇ roapatite materials which are useful in the production of lamps exhibiting a "daylight” color.
• "Daylight” is a color defined by an oval that has x values ranging from
• OMPI 1W OMPI 1W
• y values ranging from about 0.330 to about 0.345.
• New strontium calcium fluorapatite phosphors having the formula Ca 5-.0 n -a-w-x-y Sra Cdw Mnx Sby (PO4.) ; 3-, F1,-y Oy
• Fig. 1 is a fluorescent lamp employing the phosphor of the present invention.
• Fig. 2 is a portion of the CIE diagram containing information useful in understanding the present invention.
• Fig. 3 through 8 are the spectral energy distribution curves for a number of manganese-antimony activated cal- cium-strontium fluorapatite materials.
• Fig. 3 is the material having a value of "a" equal to zero.
• Figs. 4-7 are for the a-
• compositions containing lower levels of man ⁇ ganese are more blue and those containing higher levels are more yellow.
• the sealed glass envelope 1 has the lead-in wires 2, 3, sealed through one of its ends and corresponding lead-in wires sealed through the other end.
• the usual coiled-coil 4 of tungsten wire is supported between, and electrically connected to, the pair of lead-in wires 2, 3, and a similar coil is supported by and connected to the lead-in wires at the other end of the envelope 1.
• An insulating base piece 5 having contact pins 6 and 7, each pin being connected to one of the lead-in wires, held in the metal cap 8, which is fixed by the ce ⁇ ment 9 to one end of the envelope 1, and a similar base piece 16, having contact pins 10 and 11, is cemented to the other end by cup 12.
• the tungsten coils carry the usual electron-emitting coating of alkaline earth oxides, generally including also a small percentage of zirconium dioxide.
• a filling of inert gas such as argon, neon, krypton, and mixtures thereof, at about 2 millimeters of mercury pressure, and the usual small quantity of mercury is inside the glass envelope 1.
• the lamp has the usual stem press 14 and sealed exhaust tube 15.
• the phosphor compositions of the present invention can be used alone or in conjunction with other phosphor materials. If a fluorescent lamp is desired which is the color that would be achieved with the phosphor composition of this invention alone, one skilled in the art can deter- mine the color of emission from Fig. 2 taking into account the emission of mercury.
• the alkaline earth fluorophosphate luminescent materials are useful in fluorescent lamps.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=21970477

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (4)

Citations (8)

Family Cites Families (3)

• 1979
  • 1979-06-22 US US06/051,307 patent/US4266160A/en not_active Expired - Lifetime
• 1980
  • 1980-06-02 JP JP55501537A patent/JPH0124197B2/ja not_active Expired
  • 1980-06-02 WO PCT/US1980/000687 patent/WO1981000030A1/en not_active Ceased
  • 1980-06-18 CA CA000354251A patent/CA1145133A/en not_active Expired
• 1981
  • 1981-01-12 EP EP19800901292 patent/EP0030547A4/en not_active Withdrawn

Patent Citations (8)

Non-Patent Citations (1)

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