GB1081756A – Large crystalline tungsten and a process for its production
– Google Patents
GB1081756A – Large crystalline tungsten and a process for its production
– Google Patents
Large crystalline tungsten and a process for its production
Info
Publication number
GB1081756A
GB1081756A
GB38040/64A
GB3804064A
GB1081756A
GB 1081756 A
GB1081756 A
GB 1081756A
GB 38040/64 A
GB38040/64 A
GB 38040/64A
GB 3804064 A
GB3804064 A
GB 3804064A
GB 1081756 A
GB1081756 A
GB 1081756A
Authority
GB
United Kingdom
Prior art keywords
production
composition
tungsten
large crystalline
crystalline tungsten
Prior art date
1963-09-20
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
GB38040/64A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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.)
1963-09-20
Filing date
1964-09-17
Publication date
1967-08-31
1964-09-17
Application filed by Egyesuelt Izzolampa es Villamossagi Rt
filed
Critical
Egyesuelt Izzolampa es Villamossagi Rt
1967-08-31
Publication of GB1081756A
publication
Critical
patent/GB1081756A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01K—ELECTRIC INCANDESCENT LAMPS
H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
H01K3/02—Manufacture of incandescent bodies
B—PERFORMING OPERATIONS; TRANSPORTING
B22—CASTING; POWDER METALLURGY
B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
B22F9/00—Making metallic powder or suspensions thereof
B22F9/16—Making metallic powder or suspensions thereof using chemical processes
B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
B—PERFORMING OPERATIONS; TRANSPORTING
B22—CASTING; POWDER METALLURGY
B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
B22F9/00—Making metallic powder or suspensions thereof
B22F9/16—Making metallic powder or suspensions thereof using chemical processes
B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
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
C22B34/00—Obtaining refractory metals
C22B34/30—Obtaining chromium, molybdenum or tungsten
C22B34/36—Obtaining tungsten
C—CHEMISTRY; METALLURGY
C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22C—ALLOYS
C22C1/00—Making non-ferrous alloys
C22C1/04—Making non-ferrous alloys by powder metallurgy
C—CHEMISTRY; METALLURGY
C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22C—ALLOYS
C22C1/00—Making non-ferrous alloys
C22C1/04—Making non-ferrous alloys by powder metallurgy
C22C1/045—Alloys based on refractory metals
C—CHEMISTRY; METALLURGY
C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22C—ALLOYS
C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
C22C27/04—Alloys based on tungsten or molybdenum
Abstract
Tungsten has added to it .K.0.0005-0.01% .Si.0.0005-0.01% .Ga.0.0001-0.5% in order to increase the grain size thereof. The composition may be made by mixing tungsten acid (WO3. H2O) paste with potassium silicate and gallium nitrate solutions, drying the mixture, dehydrating it at 300 DEG C. and then reducing it in a hydrogen stream at temperatures rising up to 850 DEG C. The powder so formed is then pressed and sintered in a conventional manner. The composition may be used as a filament in incandescent lamps, electron tubes or luminescent tubes.
GB38040/64A
1963-09-20
1964-09-17
Large crystalline tungsten and a process for its production
Expired
GB1081756A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
HUMA001282
1963-09-20
Publications (1)
Publication Number
Publication Date
GB1081756A
true
GB1081756A
(en)
1967-08-31
Family
ID=10998380
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB38040/64A
Expired
GB1081756A
(en)
1963-09-20
1964-09-17
Large crystalline tungsten and a process for its production
Country Status (7)
Country
Link
US
(1)
US3351438A
(en)
AT
(1)
AT244446B
(en)
CH
(1)
CH426005A
(en)
DE
(1)
DE1247669B
(en)
GB
(1)
GB1081756A
(en)
NL
(2)
NL6410632A
(en)
SE
(1)
SE303199B
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3798008A
(en)
*
1972-09-12
1974-03-19
Egyesuelt Izzolampa
Retentive tungsten body containing 20{14 50 ppm titanium and/or zirconium
GB2203588A
(en)
*
1987-02-19
1988-10-19
Christopher Edward Maloney
Thermionic cathode
Families Citing this family (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3475159A
(en)
*
1967-01-16
1969-10-28
Dow Chemical Co
Method for preparing tungsten powders doped with refractory metal oxides
US3927989A
(en)
*
1969-09-30
1975-12-23
Duro Test Corp
Tungsten alloy filaments for lamps and method of making
US3838486A
(en)
*
1972-03-16
1974-10-01
Egyesuelt Izzolampa
Method for the preparation of tungsten incandescent body containing foreign substances
HU163582B
(en)
*
1972-03-16
1973-09-27
US4908182A
(en)
*
1988-04-11
1990-03-13
Polytechnic University
Rapidly solidified high strength, ductile dispersion-hardened tungsten-rich alloys
US4882203A
(en)
*
1988-11-04
1989-11-21
Cvd Systems & Services
Heating element
Family Cites Families (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US1026384A
(en)
*
1908-09-23
1912-05-14
Gen Electric
Metal filament.
US1602526A
(en)
*
1922-09-15
1926-10-12
Westinghouse Lamp Co
Control of crystal development in refractory metals
US2431690A
(en)
*
1945-02-21
1947-12-02
Westinghouse Electric Corp
Consolidation of metal powder
US3210589A
(en)
*
1960-04-28
1965-10-05
Westinghouse Electric Corp
Electric incandescent lamp having filament of partially recrystallized fibrous structure
US3236699A
(en)
*
1963-05-09
1966-02-22
Gen Electric
Tungsten-rhenium alloys
0
NL
NL132462D
patent/NL132462C/xx
active
1964
1964-09-01
AT
AT753464A
patent/AT244446B/en
active
1964-09-01
CH
CH1140464A
patent/CH426005A/en
unknown
1964-09-01
DE
DEE27709A
patent/DE1247669B/en
active
Pending
1964-09-11
US
US395797A
patent/US3351438A/en
not_active
Expired – Lifetime
1964-09-11
NL
NL6410632A
patent/NL6410632A/xx
unknown
1964-09-17
GB
GB38040/64A
patent/GB1081756A/en
not_active
Expired
1964-09-18
SE
SE11263/64A
patent/SE303199B/xx
unknown
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3798008A
(en)
*
1972-09-12
1974-03-19
Egyesuelt Izzolampa
Retentive tungsten body containing 20{14 50 ppm titanium and/or zirconium
GB2203588A
(en)
*
1987-02-19
1988-10-19
Christopher Edward Maloney
Thermionic cathode
Also Published As
Publication number
Publication date
AT244446B
(en)
1966-01-10
US3351438A
(en)
1967-11-07
DE1247669B
(en)
1967-08-17
SE303199B
(en)
1968-08-19
NL132462C
(en)
CH426005A
(en)
1966-12-15
NL6410632A
(en)
1965-03-22
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