FR2259071A1 - Heat treatment of magnetic or piezoelectric powder - prior to moulding and sintering, comprising spray heating in controlled atmos - Google Patents

Heat treatment of magnetic or piezoelectric powder - prior to moulding and sintering, comprising spray heating in controlled atmos

Info

Publication number
FR2259071A1
FR2259071A1 FR7502416A FR7502416A FR2259071A1 FR 2259071 A1 FR2259071 A1 FR 2259071A1 FR 7502416 A FR7502416 A FR 7502416A FR 7502416 A FR7502416 A FR 7502416A FR 2259071 A1 FR2259071 A1 FR 2259071A1
Authority
FR
France
Prior art keywords
sintering
moulding
magnetic
prior
heat treatment
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.)
Granted
Application number
FR7502416A
Other languages
French (fr)
Other versions
FR2259071B1 (en
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.)
Siemens AG
Original Assignee
Siemens AG
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 DE19742403900 external-priority patent/DE2403900B2/en
Priority claimed from DE19742459114 external-priority patent/DE2459114A1/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of FR2259071A1 publication Critical patent/FR2259071A1/en
Application granted granted Critical
Publication of FR2259071B1 publication Critical patent/FR2259071B1/fr
Granted 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • 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
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B

Abstract

Sintered bodies are made from ceramic powder by preheat treating or presintering the powder at 700-1100 (900-1000) degrees C by a localised heating process for 15-150(30-60) secs. in a gaseous atmosphere which may be inert, oxidising or reducing according to the nature of the matl. being treated, then forming a shaped body by any normal method, drying and firing. For ferrites, titanates zirconates, garnets, for electronics use e.g. for piezoelectric filters, ferrite pot cures, and for other similar substances. Reduced cost since the desalinated water used in the process can be readily recovered and reused. No other heating devices are heated and cooled, so that energy used in a minimum.
FR7502416A 1974-01-28 1975-01-27 Heat treatment of magnetic or piezoelectric powder - prior to moulding and sintering, comprising spray heating in controlled atmos Granted FR2259071A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742403900 DE2403900B2 (en) 1974-01-28 1974-01-28 Process for the production of pre-sintered electroceramic powder masses
DE19742459114 DE2459114A1 (en) 1974-12-13 1974-12-13 Heat treatment of magnetic or piezoelectric powder - prior to moulding and sintering, comprising spray heating in controlled atmos

Publications (2)

Publication Number Publication Date
FR2259071A1 true FR2259071A1 (en) 1975-08-22
FR2259071B1 FR2259071B1 (en) 1982-07-23

Family

ID=25766522

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7502416A Granted FR2259071A1 (en) 1974-01-28 1975-01-27 Heat treatment of magnetic or piezoelectric powder - prior to moulding and sintering, comprising spray heating in controlled atmos

Country Status (3)

Country Link
JP (1) JPS5731545B2 (en)
AT (1) AT344406B (en)
FR (1) FR2259071A1 (en)

Also Published As

Publication number Publication date
FR2259071B1 (en) 1982-07-23
ATA25875A (en) 1977-11-15
AT344406B (en) 1978-07-25
JPS50123708A (en) 1975-09-29
JPS5731545B2 (en) 1982-07-05

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Legal Events

Date Code Title Description
ST Notification of lapse