GB1018057A - Improvements in and relating to positive temperature-coefficient of resistance materials - Google Patents

Improvements in and relating to positive temperature-coefficient of resistance materials

Info

Publication number
GB1018057A
GB1018057A GB1372863A GB1372863A GB1018057A GB 1018057 A GB1018057 A GB 1018057A GB 1372863 A GB1372863 A GB 1372863A GB 1372863 A GB1372863 A GB 1372863A GB 1018057 A GB1018057 A GB 1018057A
Authority
GB
United Kingdom
Prior art keywords
positive temperature
coefficient
temperature coefficient
mixing
air
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
GB1372863A
Inventor
Stanley Schomberg
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.)
International Research and Development Co Ltd
Original Assignee
International Research and Development Co 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 International Research and Development Co Ltd filed Critical International Research and Development Co Ltd
Priority to GB1372863A priority Critical patent/GB1018057A/en
Priority to FR969772A priority patent/FR1390664A/en
Publication of GB1018057A publication Critical patent/GB1018057A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
    • C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
    • C04B35/4682—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates based on BaTiO3 perovskite phase
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/022—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances
    • H01C7/023—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances containing oxides or oxidic compounds, e.g. ferrites
    • H01C7/025—Perovskites, e.g. titanates

Abstract

1,018,057. Positive temperature coefficient resistors. INTERNATIONAL RESEARCH & DEVELOPMENT CO. Ltd. March 20, 1964 [April 5, 1963], No. 13728/63. Heading H1K. A positive temperature coefficient resistor comprises a body of material of the formula Ba 1-y Sr y Ti 1-x Ta x O 3 where 0À001 < x < 0À004 and 0À001 < y < 0À8. Typical materials are Ba 0 . 85 Sr 0 . 15 Ti 0 . 997 Ta 0 . 003 O 3 and Ba 0 . 8 Sre 0 . 2 Ti 0 . 997 Ta 0 . 003 O 3 , the former exhibiting a temperature coefficient of about 30% in the range 95-115‹ C. and the latter a coefficient of 15% over a range extending from 85‹ C. to above 115‹ C. The materials are prepared by mixing and powdering barium titanyl oxalate, tantalum pentoxide, titanium dioxide and barium and strontium carbonates, calcining the mixture in air, mixing the ground product with water and cold pressing into tablets which are then sintered in air and cooled slowly. The faces of the finished tablets are then coated with nickel to which copper contacts are soldered.
GB1372863A 1963-04-05 1963-04-05 Improvements in and relating to positive temperature-coefficient of resistance materials Expired GB1018057A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1372863A GB1018057A (en) 1963-04-05 1963-04-05 Improvements in and relating to positive temperature-coefficient of resistance materials
FR969772A FR1390664A (en) 1963-04-05 1964-04-03 Improvements to electrically resistant materials with a positive temperature coefficient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1372863A GB1018057A (en) 1963-04-05 1963-04-05 Improvements in and relating to positive temperature-coefficient of resistance materials

Publications (1)

Publication Number Publication Date
GB1018057A true GB1018057A (en) 1966-01-26

Family

ID=10028296

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1372863A Expired GB1018057A (en) 1963-04-05 1963-04-05 Improvements in and relating to positive temperature-coefficient of resistance materials

Country Status (1)

Country Link
GB (1) GB1018057A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245146A (en) * 1977-03-07 1981-01-13 Tdk Electronics Company Limited Heating element made of PTC ceramic material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245146A (en) * 1977-03-07 1981-01-13 Tdk Electronics Company Limited Heating element made of PTC ceramic material

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