GB1449509A - Preparation of mild ferrites and barium titanates - Google Patents

Preparation of mild ferrites and barium titanates

Info

Publication number
GB1449509A
GB1449509A GB5499073A GB5499073A GB1449509A GB 1449509 A GB1449509 A GB 1449509A GB 5499073 A GB5499073 A GB 5499073A GB 5499073 A GB5499073 A GB 5499073A GB 1449509 A GB1449509 A GB 1449509A
Authority
GB
United Kingdom
Prior art keywords
ferrites
mild
gases
preparation
batio
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
GB5499073A
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.)
Montedison SpA
Original Assignee
Montecatini Edison SpA
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
Priority claimed from IT32283/72A external-priority patent/IT1044942B/en
Application filed by Montecatini Edison SpA filed Critical Montecatini Edison SpA
Publication of GB1449509A publication Critical patent/GB1449509A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Iron (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

1449509 Ferrites; barium titanate MONTECATINI EDISON SpA 27 Nov 1973 [30 Nov 1972] 54990/73 Addition to 1386505 Headings C1A and C1J Barium titanate and mild ferrites of formula Me(1) x Me(2) 1-x Fe<SP>3+</SP> 2-y Me(3) y O<SP>2-</SP> 4 , where Me(1) and Me(2) are Mn<SP>2+</SP>, Co<SP>2+</SP>, Ni<SP>2+</SP>, Cu<SP>2+</SP>, Mg<SP>2+</SP>, Cd<SP>2+</SP>, Zn<SP>2+</SP> or (¢Li<SP>+</SP>+¢Fe<SP>3+</SP>), Me(3) is Al<SP>3+</SP>, Cr<SP>3+</SP>, Sc<SP>3+</SP>, Ga<SP>3+</SP> or In<SP>3+</SP>, x is 0-1 and y is 0-2, are prepared from a slurry containing TiO 2 or ferric oxide and/or hydroxide and oxides and/or carbonates of Ba, Me(1), Me(2) and/or Me(3), by (a) drying and granulating the slurry with gases of inlet temperature 400-800‹ C., the gases being those obtained in step (b) below with or without other hot gases, to obtain granules of average particle size 150-300 microns; (c) calcining the granules at 700- 1100‹ C. for ferrites or at 1150-1200‹ C. for BaTiO 3 for 0À5-4 hr. in a fluidized bed reactor; and (d) cooling and grinding. Examples produce MgFe 2 O 4 and BaTiO 3 .
GB5499073A 1971-09-24 1973-11-27 Preparation of mild ferrites and barium titanates Expired GB1449509A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2904971 1971-09-24
IT32283/72A IT1044942B (en) 1972-11-30 1972-11-30 PROCESS FOR PREPARING SWEET AND BARIUM TITANATES

Publications (1)

Publication Number Publication Date
GB1449509A true GB1449509A (en) 1976-09-15

Family

ID=26328813

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5499073A Expired GB1449509A (en) 1971-09-24 1973-11-27 Preparation of mild ferrites and barium titanates

Country Status (6)

Country Link
AT (2) AT339059B (en)
CH (1) CH589570A5 (en)
DE (1) DE2359424A1 (en)
FR (1) FR2208863B2 (en)
GB (1) GB1449509A (en)
NL (1) NL7316126A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114890780A (en) * 2022-04-06 2022-08-12 哈尔滨工业大学 Y-shaped hexagonal ferrite magnetoelectric coupling ceramic material and preparation method thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT378627B (en) * 1982-05-11 1985-09-10 List Hans PIEZOELECTRICAL, ELECTROACOUSTIC COMPONENTS
JPS58144839A (en) * 1982-02-13 1983-08-29 Tdk Corp Magnetic carrier particles
DE3729700C2 (en) * 1987-09-04 1995-02-02 Siemens Ag Process for the production of pressable granules for the manufacture of products from sintered ceramic material
AT393183B (en) * 1987-12-15 1991-08-26 Avl Verbrennungskraft Messtech PIEZOELECTRIC CRYSTAL ELEMENT AND METHOD FOR PRODUCING THE SAME

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114890780A (en) * 2022-04-06 2022-08-12 哈尔滨工业大学 Y-shaped hexagonal ferrite magnetoelectric coupling ceramic material and preparation method thereof

Also Published As

Publication number Publication date
CH589570A5 (en) 1977-07-15
NL7316126A (en) 1974-06-04
AT339059B (en) 1977-09-26
AT343080B (en) 1978-05-10
ATA998373A (en) 1977-01-15
DE2359424A1 (en) 1974-06-06
FR2208863A2 (en) 1974-06-28
FR2208863B2 (en) 1978-03-17
ATA457976A (en) 1977-09-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee