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2 229 441

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(51)

IPC

(21) (22)

Application

2002133935/15, 2002-12-17

(24)

Start date

2002-12-17

(22)

Actual filing date

2002-12-17

(45)

Published

2004-05-27

(72)

Inventor

Danchevskaja M.N.Ivakin Ju.D.Torbin S.N.Panasjuk G.P.Voroshilov I.L.Belan V.N.

(73)

Holder

Danchevskaja Marina Nikolaevna Moskva, Ul. Donskaja, Kv.21Ivakin Jurij Dmitrievich Moskva, Ul. Shabolovka, Kv.37Torbin Sergej Nikolaevich Moskva, Jugorskij Pr-D, Kv.159Panasjuk Georgij Pavlovich Moskva, Ul. Donskaja, Kv.21Voroshilov Igor' Leonidovich Moskovskaja Obl., G. Pushkino, Aviatsionnyj Pr-D, Kv.44Belan Viktor Nikolaevich Moskovskaja Obl., G. Ljubertsy, Ul. Smirnovskaja, Kv.53

METHOD OF PREPARING FINE-GRAINED CORUNDUM Russian patent published in 2004 - IPC

Abstract RU 2229441 C1

FIELD: super-hard materials. SUBSTANCE: method consists in that aluminum hydroxide or aluminum oxyhydroxide is preliminarily subjected to heat treatment in air at 310 to 1200^(r)' or to autoclave hydrothermal treatment at 150 to 300^(r)' followed by thermal steam treatment at 380-450^(r)' and pressure 3.4 to 40 MPa. EFFECT: enabled preparation of corundum with wider particle size range. 2 cl, 10 dwg, 1 tbl, 3 tbl

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RU 2 229 441 C1

Authors

Danchevskaja M.N.

Ivakin Ju.D.

Torbin S.N.

Panasjuk G.P.

Voroshilov I.L.

Belan V.N.

Dates

2004-05-27—Published

2002-12-17—Filed