|Title of Invention||
"A PROCESS OF MAKING POWDER PRECURSORS FOR REACTIVE ALUMINA USED IN THE MANUFACTURE OF HIGH-TECH MATERIALS"
|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.|
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
|Indian Patent Application Number||644/DEL/2004|
|PG Journal Number||06/2011|
|Date of Filing||31-Mar-2004|
|Name of Patentee||COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH|
|Applicant Address||RAFI MARG, NEW DELHI-110001, INDIA.|
|PCT International Classification Number||C23C 4/00|
|PCT International Application Number||N/A|
|PCT International Filing date|