GB579868A - An improved dielectric composition - Google Patents

An improved dielectric composition

Info

Publication number
GB579868A
GB579868A GB481544A GB481544A GB579868A GB 579868 A GB579868 A GB 579868A GB 481544 A GB481544 A GB 481544A GB 481544 A GB481544 A GB 481544A GB 579868 A GB579868 A GB 579868A
Authority
GB
United Kingdom
Prior art keywords
per cent
oxide
oxides
magnesia
per
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
GB481544A
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 GB481544A priority Critical patent/GB579868A/en
Publication of GB579868A publication Critical patent/GB579868A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Insulating Materials (AREA)

Abstract

A dielectric having a temperature coefficient of capacitance between plus 50 and minus 250 per million per degree C., comprises 60-99.8 per cent of magnesia and titania in proportions between 5 : 1 and 1 : 3, and small quantities of one or more of the oxides of calcium, barium, strontium. When added singly, the amounts are respectively, calcium oxide 0.8-6 per cent, strontium oxide 0.2-5 per cent, barium oxide 0.5-15 per cent. An example of the oxides used together is calcium oxide 0.75 per cent, strontium oxide 0.15 per cent, barium oxide 0.4 per cent. Graphs and examples are given showing the decrease in the coefficient with increased additions of the oxides. The magnesia must be in a form to produce magnesium titanate, and may be fused magnesia, magnesium hydroxide, magnesite, or precipitated carbonate. The titania may be rutile, anatase or mixtures. The alkaline earth oxides may be added as carbonates, sulphates, titanates or other combinations. The composition may also contain fluxes and plasticisers.
GB481544A 1944-03-15 1944-03-15 An improved dielectric composition Expired GB579868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB481544A GB579868A (en) 1944-03-15 1944-03-15 An improved dielectric composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB481544A GB579868A (en) 1944-03-15 1944-03-15 An improved dielectric composition

Publications (1)

Publication Number Publication Date
GB579868A true GB579868A (en) 1946-08-19

Family

ID=9784328

Family Applications (1)

Application Number Title Priority Date Filing Date
GB481544A Expired GB579868A (en) 1944-03-15 1944-03-15 An improved dielectric composition

Country Status (1)

Country Link
GB (1) GB579868A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE929350C (en) * 1951-05-23 1955-06-23 Philips Nv Process for the production of semiconducting material
US2908579A (en) * 1955-06-23 1959-10-13 American Lava Corp Barium titanate insulators
US2955946A (en) * 1957-02-21 1960-10-11 Soyck Werner Dielectric containing barium metatitanate
DE977559C (en) * 1951-02-08 1967-02-16 Philips Nv Ceramic capacitor dielectric
WO1984002521A1 (en) * 1982-12-22 1984-07-05 Tam Ceramics Inc Low firing ceramic dielectric for temperature compensating capacitors
US4506026A (en) * 1982-12-22 1985-03-19 Tam Ceramics, Inc. Low firing ceramic dielectric for temperature compensating capacitors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977559C (en) * 1951-02-08 1967-02-16 Philips Nv Ceramic capacitor dielectric
DE929350C (en) * 1951-05-23 1955-06-23 Philips Nv Process for the production of semiconducting material
US2908579A (en) * 1955-06-23 1959-10-13 American Lava Corp Barium titanate insulators
US2955946A (en) * 1957-02-21 1960-10-11 Soyck Werner Dielectric containing barium metatitanate
WO1984002521A1 (en) * 1982-12-22 1984-07-05 Tam Ceramics Inc Low firing ceramic dielectric for temperature compensating capacitors
US4506026A (en) * 1982-12-22 1985-03-19 Tam Ceramics, Inc. Low firing ceramic dielectric for temperature compensating capacitors

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