Title of Invention | "A PROCESS OF MAKING POWDER PRECURSORS FOR REACTIVE ALUMINA USED IN THE MANUFACTURE OF HIGH-TECH MATERIALS" |
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Abstract | In the present invention there is provided a process of making powder precursors for reactive alumina by flash polycondensation technique to yield a reactive intermediate in the form of hydroxyhydrogel which on controlled heat treatment produces reactive alumina used in the manufacture of high-tech materials, which can serve various applications such as making yttrium aluminium garnet, Yttrium aluminium perovskite, Yttrium aluminnium monoclinic, Mullite, catalytic application, starting materials for various aluminius materials, abrasives. |
Full Text | We claim: 1. A process of making powder precursors for reactive alumina used in the manufacture of high-tech materials, which comprises making a solution of a soluble aluminium salt in the concentration range of 0.4 to 0.85 gm/cc or saturated salution of aluminium salt using de-ionised water, pouring the aluminium salt in concentration range of 0.4 to 0.85 gm/cc or saturated solution of aluminium salt in ammonia solution solution of dilution in the range of 1:1 to 1:2 to obtain a gel like mass, ageing the said gel like mass for a period in the range of 8 to 72 hours, washing the aged gel like mass and removing soluble salts by filtering, calcining the resultant gel like mass at a temperature in the range of 300 to 750°C. 2. A process as claimed in claim 1, wherein the soluble aluminium salt is selected from aluminium nitrate, aluminium chloride, aluminium sulphate. 3. A process as claimed in claim 1-2, wherein the preferable soluble aluminium salt is aluminium nitrate Nona hydrate (96% phase pure). 4. A process of making powder precursors for reactive alumina used in the manufacture of high-tech materials, substantially as herein described with reference to the example |
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644-DEL-2004-Claims-(20-10-2010).pdf
644-DEL-2004-Correspondence-Others-(12-01-2011).pdf
644-DEL-2004-Correspondence-Others-(20-10-2010).pdf
644-del-2004-correspondence.pdf
644-DEL-2004-Form-1-(12-01-2011).pdf
Patent Number | 245964 | ||||||||||||
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Indian Patent Application Number | 644/DEL/2004 | ||||||||||||
PG Journal Number | 06/2011 | ||||||||||||
Publication Date | 11-Feb-2011 | ||||||||||||
Grant Date | 08-Feb-2011 | ||||||||||||
Date of Filing | 31-Mar-2004 | ||||||||||||
Name of Patentee | COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH | ||||||||||||
Applicant Address | RAFI MARG, NEW DELHI-110001, INDIA. | ||||||||||||
Inventors:
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PCT International Classification Number | C23C 4/00 | ||||||||||||
PCT International Application Number | N/A | ||||||||||||
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PCT Conventions:
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