GB583494A - An improved dielectric composition - Google Patents

An improved dielectric composition

Info

Publication number
GB583494A
GB583494A GB586944A GB586944A GB583494A GB 583494 A GB583494 A GB 583494A GB 586944 A GB586944 A GB 586944A GB 586944 A GB586944 A GB 586944A GB 583494 A GB583494 A GB 583494A
Authority
GB
United Kingdom
Prior art keywords
oxides
titania
added
oxide
composition
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
GB586944A
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.)
TAYLOR TUNNICLIFF AND Co
Original Assignee
TAYLOR TUNNICLIFF AND Co
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 TAYLOR TUNNICLIFF AND Co filed Critical TAYLOR TUNNICLIFF AND Co
Priority to GB586944A priority Critical patent/GB583494A/en
Publication of GB583494A publication Critical patent/GB583494A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A fired dielectric composition consists of titania and one or more of lime, strontia, and baria, the ratio of the titania to the other oxide or oxides varying from 1 : 50 to 1 : 0.99 so that the temperature co-efficient of capacitance varies between -3000 and 100 parts per million per degree C. between 0 DEG and 70 DEG according to the nature and amount of the added oxide. The proportion of the titania and added oxides to the whole composition may vary between 70 and 100 per cent., the remainder of the composition, if any, being constituted by one or more oxides of aluminium, antimony, beryllium, bismuth, cadmium, cerium, lead, magnesium, silicon, tin, thorium, or zinc, or combinations thereof such as clay, talc, zircon, or magnesium spinel. Tables are given showing the temperature coefficients of capacitance and permittivities of different compositions. The compositions may be formed by dry mixing the ingredients, or slip casting; they may be partly or completely calcined before mixing and the final firing; they can be shaped by extrusion or otherwise; and they can be fired in one or more operations in a selected atmosphere. The titania used may be in the form of rutile, while the other oxides may be added in the form of carbonates, oxalates, or other salts which decompose on heating. Specification 489,052 is referred to.
GB586944A 1944-03-30 1944-03-30 An improved dielectric composition Expired GB583494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB586944A GB583494A (en) 1944-03-30 1944-03-30 An improved dielectric composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB586944A GB583494A (en) 1944-03-30 1944-03-30 An improved dielectric composition

Publications (1)

Publication Number Publication Date
GB583494A true GB583494A (en) 1946-12-19

Family

ID=9804128

Family Applications (1)

Application Number Title Priority Date Filing Date
GB586944A Expired GB583494A (en) 1944-03-30 1944-03-30 An improved dielectric composition

Country Status (1)

Country Link
GB (1) GB583494A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE946294C (en) * 1953-08-27 1956-07-26 Siemens Ag Dielectric amplifier
US2886513A (en) * 1954-10-05 1959-05-12 Exxon Research Engineering Co Titanium dioxide-calcium oxide catalyst for cracking hydrocarbons
DE1104882B (en) * 1957-01-31 1961-04-13 Csf Process for the production of a ceramic dielectric with high dielectric constant and low temperature coefficient of the DC
DE1139063B (en) * 1957-10-18 1962-10-31 Philips Nv Process for the production of ceramic insulating materials for capacitor dielectrics
DE977625C (en) * 1949-12-09 1967-09-21 Philips Nv Capacitor with a ceramic dielectric and method for producing this ceramic dielectric
US3506596A (en) * 1967-10-11 1970-04-14 Matsushita Electric Ind Co Ltd Semiconducting ceramic compositions with positive temperature coefficient of resistance
DE1646724B1 (en) * 1967-01-10 1971-07-08 Matsushita Electric Ind Co Ltd Improved ceramic dielectrics
DE1646723B1 (en) * 1967-01-10 1972-03-23 Matsushita Electric Ind Co Ltd Fired dielectric mass

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977625C (en) * 1949-12-09 1967-09-21 Philips Nv Capacitor with a ceramic dielectric and method for producing this ceramic dielectric
DE946294C (en) * 1953-08-27 1956-07-26 Siemens Ag Dielectric amplifier
US2886513A (en) * 1954-10-05 1959-05-12 Exxon Research Engineering Co Titanium dioxide-calcium oxide catalyst for cracking hydrocarbons
DE1104882B (en) * 1957-01-31 1961-04-13 Csf Process for the production of a ceramic dielectric with high dielectric constant and low temperature coefficient of the DC
DE1139063B (en) * 1957-10-18 1962-10-31 Philips Nv Process for the production of ceramic insulating materials for capacitor dielectrics
DE1646724B1 (en) * 1967-01-10 1971-07-08 Matsushita Electric Ind Co Ltd Improved ceramic dielectrics
DE1646723B1 (en) * 1967-01-10 1972-03-23 Matsushita Electric Ind Co Ltd Fired dielectric mass
US3506596A (en) * 1967-10-11 1970-04-14 Matsushita Electric Ind Co Ltd Semiconducting ceramic compositions with positive temperature coefficient of resistance

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