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1. WO1985000130 - MANUFACTURING OF SINTERED CERAMIC MOULDED BODIES

Publication Number WO/1985/000130
Publication Date 17.01.1985
International Application No. PCT/EP1984/000187
International Filing Date 22.06.1984
IPC
B22F 3/22 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
22for producing castings from a slip
B24D 18/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
DTOOLS FOR GRINDING, BUFFING OR SHARPENING
18Manufacture of grinding tools, e.g. wheels, not otherwise provided for
B28B 1/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
28WORKING CEMENT, CLAY, OR STONE
BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
1Producing shaped articles from the material
CPC
B22F 3/222
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
22for producing castings from a slip
222by freeze-casting or in a supercritical fluid
B24D 18/00
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
DTOOLS FOR GRINDING, BUFFING, OR SHARPENING
18Manufacture of grinding tools ; or other grinding devices; , e.g. wheels, not otherwise provided for
B28B 1/007
BPERFORMING OPERATIONS; TRANSPORTING
28WORKING CEMENT, CLAY, OR STONE
BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
1Producing shaped ; prefabricated; articles from the material
007by freezing the material
Applicants
  • RIESER, Udo [DE]/[DE]
Inventors
  • RIESER, Udo
Agents
  • BAUER, Robert
Priority Data
P 33 22 889.224.06.1983DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(EN) MANUFACTURING OF SINTERED CERAMIC MOULDED BODIES
(FR) FABRICATION DE CORPS DE FORMAGE EN CERAMIQUE FRITTEE
Abstract
(EN)
For manufacturing sintered ceramic moulded bodies and particularly moulded bodies of abrasive material including an abrasive material with relatively coarse grains such as corundum or carborundum, an aqueous mixture of raw material in question is cast into a mould for example of rubber, and withdrawn from the mould. The cooled moulded mixture is subjected to a freeze-drying process before it is fired. A particularly convenient mixture for a moulded body of abrasive material is a mixture comprised of (with respect to the dry mixture) about 70% by weight of refined corundum of which the grain size varies between 50 and 280 mesh, and of a base substance consisting substantially of pulverulent $g(a)-aluminium oxide with addition of potash feldspar, zirconium silicate and dextrine, and having a sintering temperature of 1770oC (2043oK).
(FR)
Pour la fabrication de corps de formage en céramique frittée et en particulier de corps de formage en matériau abrasif avec inclusion d'un matériau abrasif comparativement à gros grains comme par exemple le corindon ou le carborundum, un mélange aqueux du matériau brut en question est coulé dans un moule par exemple en caoutchouc, puis y est refroidi et en est démoulé. Le mélange refroidi moulé est soumis à un processus de lyophilisation avant d'être cuit. S'est avéré particulièrement adéquat pour un corps de formage en matériau abrasif, un mélange composé (par rapport au mélange sec) d'environ 70% en poids de corindon raffiné dont la grosseur des grains varie entre 50 et 280 meshs et d'une substance de base formée essentiellement d'$g(a)-oxyde d'aluminium pulvérulent avec addition de feldspath potassique, de silicate de zircon et de dextrine, et doté d'une température de frittage de 1770oC (2043oK).
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