GB791167A - Improvements in or relating to electrical resistors - Google Patents

Improvements in or relating to electrical resistors

Info

Publication number
GB791167A
GB791167A GB18200/55A GB1820055A GB791167A GB 791167 A GB791167 A GB 791167A GB 18200/55 A GB18200/55 A GB 18200/55A GB 1820055 A GB1820055 A GB 1820055A GB 791167 A GB791167 A GB 791167A
Authority
GB
United Kingdom
Prior art keywords
metals
trivalent
tetravalent
june
sintered
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
GB18200/55A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB791167A publication Critical patent/GB791167A/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
    • 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
    • C04B35/26—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 ferrites
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • 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
    • C04B35/26—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 ferrites
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2616—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing lithium
    • 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
    • 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
    • H01C7/001—Mass resistors
    • 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
    • H01C7/04—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 negative temperature coefficient
    • H01C7/042—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 negative temperature coefficient mainly consisting of inorganic non-metallic substances
    • H01C7/043—Oxides or oxidic compounds
    • H01C7/045—Perovskites, e.g. titanates

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Conductive Materials (AREA)

Abstract

791,167. Temperature sensitive resistors. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 23, 1955 [June 26, 1954], No. 18200/55. Class 37. A sintered electrical resistor consisting of oxidic compounds with Perovskite structure contains Fe and/or Cr, or Co and Fe and/or Cr, at least one of these metals occurring in trivalent and tetravalent form. Manganese in tetravalent form may also be included, and also Al, Ti and/or Ni up to 20 per cent of the total of Fe, Cr, Co and Mn. A flux such as copper oxide, zinc oxide, clay and glass may also be added. The combination of trivalent and tetravalent forms of the metals Fe, Cr and Co may be achieved by the use of a mixture of trivalent metals (such as yttrium, lanthanium, praseodymium, neodymium), and bivalent metals (such as Ca, Sr, Ba, Pb and Cd) for the large metal ions designated by A in the Perovskite structure general formula ABO 3 . A large number of examples of such compositions are given in the specimen. As one example a mixed crystal of LaFe<SP>3</SP>+O 3 and SrFe<SP>4</SP>+O 3 is formed by sintering in air La 2 O 3 , SrO and Fe 2 O 3 at temperatures between 1250‹ and 1400‹ C. The material may be obtained from the composing oxides in the form of double oxides, carbonates or other compounds. The constituents are ground, mixed to a paste, for example with an organic binder, shaped and sintered in an oxygen atmosphere. The material possesses a high temperature coefficient and low resistivity.
GB18200/55A 1954-06-26 1955-06-23 Improvements in or relating to electrical resistors Expired GB791167A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL95807T 1954-06-26

Publications (1)

Publication Number Publication Date
GB791167A true GB791167A (en) 1958-02-26

Family

ID=31885036

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18200/55A Expired GB791167A (en) 1954-06-26 1955-06-23 Improvements in or relating to electrical resistors

Country Status (5)

Country Link
US (1) US2862891A (en)
BE (1) BE539287A (en)
DE (1) DE1042080B (en)
GB (1) GB791167A (en)
NL (1) NL95807C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11189404B2 (en) 2015-12-16 2021-11-30 Epcos Ag NTC ceramic part, electronic component for inrush current limiting, and method for manufacturing an electronic component

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050407A (en) * 1959-08-25 1962-08-21 Bell Telephone Labor Inc Single crystal garnets
US3193502A (en) * 1960-09-16 1965-07-06 Weizmann Inst Of Science Rare earth ferrites
NL294762A (en) * 1962-08-01
FR2098953A5 (en) * 1970-07-31 1972-03-10 Anvar
US3968303A (en) * 1974-06-17 1976-07-06 The Bendix Corporation Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon
FR2331128A1 (en) * 1975-11-07 1977-06-03 Thomson Csf DIELECTRIC AND AMAGNETIC CERAMIC USED IN HYPERFREQUENCY
US4162631A (en) * 1977-12-05 1979-07-31 Ford Motor Company Rare earth or yttrium, transition metal oxide thermistors
DE2824408C3 (en) * 1978-06-03 1985-08-01 Dornier System Gmbh, 7990 Friedrichshafen Process for producing an electronically
FR2445680A1 (en) * 1978-12-29 1980-07-25 Anvar Electrically resistive perovskite compsns. - suitable for electrical heaters operating at high temps.
CA1147945A (en) * 1979-11-02 1983-06-14 Takayuki Kuroda Oxide thermistor compositions
TW457498B (en) * 1998-12-03 2001-10-01 Murata Manufacturing Co Semiconductor ceramic and semiconductor ceramic device
DE102018216352A1 (en) * 2018-09-25 2020-03-26 Robert Bosch Gmbh NTC resistance module

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH272927A (en) * 1946-08-23 1951-01-15 Philips Nv Process for the production of a semiconducting material.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11189404B2 (en) 2015-12-16 2021-11-30 Epcos Ag NTC ceramic part, electronic component for inrush current limiting, and method for manufacturing an electronic component

Also Published As

Publication number Publication date
US2862891A (en) 1958-12-02
BE539287A (en) 1959-07-17
NL95807C (en) 1960-11-15
DE1042080B (en) 1958-10-30

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