GB1064000A - Improvements in or relating to resistors - Google Patents
Improvements in or relating to resistorsInfo
- Publication number
- GB1064000A GB1064000A GB33690/65A GB3369065A GB1064000A GB 1064000 A GB1064000 A GB 1064000A GB 33690/65 A GB33690/65 A GB 33690/65A GB 3369065 A GB3369065 A GB 3369065A GB 1064000 A GB1064000 A GB 1064000A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- sintered
- dopants
- dopant
- aug
- 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
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
-
- 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
-
- 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
-
- 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
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)
- Thermistors And Varistors (AREA)
Abstract
1,064,000. Resistors. SIEMENS A.G. Aug. 6, 1965 [Aug. 7, 1964], No. 33690/65. Heading H1K. A resistor having a positive temperature cofficient of resistance and/or a resistance which is independent of the applied voltage, comprises a body of sintered grains of 0À1 to 2À0 Á, of a ferro-electric ceramic perovskite material of formula M<SP>1</SP>M<SP>11</SP>O 3 containing at least one dopant wherein the proportion of dopant at the grain boundaries is at least ten times greater than in the interior and wherein the dopants amount to 0À01 to 0À3 mol. per cent of the metal M<SP>11</SP>. M<SP>1</SP> may be a divalent metal e.g. an alkaline earth, and M<SP>11</SP> a tetravalent metal e.g. Ti, Zr or Sn; or M<SP>1</SP> a monovalent metal e.g. an alkali metal and M<SP>11</SP> a pentavalent metal e.g. Nb or Ta, whilst the dopants may be Sb, La or Nb. A suitable resistor composition may be made by milling BaCO 3 , TiO 2 and Sb 2 O 3 in distilled water, drying and heating to 1000-1100‹ C. to give barium titanate doped with antimony. The titanate is mixed with an organic binder, pressed into shape and sintered at 1360‹ to 1440‹ C. in an oxidizing atmosphere. The sintered product has metal electrodes applied thereto and is encapsulated to keep it moisture free.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES0092523 | 1964-08-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1064000A true GB1064000A (en) | 1967-04-05 |
Family
ID=7517279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33690/65A Expired GB1064000A (en) | 1964-08-07 | 1965-08-06 | Improvements in or relating to resistors |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1471445B (en) |
FR (1) | FR1454455A (en) |
GB (1) | GB1064000A (en) |
NL (1) | NL6510299A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4536328A (en) * | 1984-05-30 | 1985-08-20 | Heraeus Cermalloy, Inc. | Electrical resistance compositions and methods of making the same |
-
1964
- 1964-08-07 DE DES92523A patent/DE1471445B/de active Pending
-
1965
- 1965-08-06 FR FR27475A patent/FR1454455A/en not_active Expired
- 1965-08-06 NL NL6510299A patent/NL6510299A/xx unknown
- 1965-08-06 GB GB33690/65A patent/GB1064000A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1471445B (en) | 1970-08-20 |
NL6510299A (en) | 1966-02-08 |
FR1454455A (en) | 1966-02-11 |
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