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Alpha-Al2O3

Printed From: Sol-Gel Gateway
Category: Sol-Gel Forum
Forum Name: Sol-Gel and derived Materials
Forum Discription: Discussion on Bulk Gels, Aerogels, Xerogels, Drying procedures, Bulk glass and ceramics processing,etc
URL: http://www.solgel.com/sgforum/forum_posts.asp?TID=1130
Printed Date: 25 June 2019 at 4:05pm


Topic: Alpha-Al2O3
Posted By: yatkins
Subject: Alpha-Al2O3
Date Posted: 01 March 2007 at 7:55am
Hi everyone,

Im trying to make alpha Al2 03 via a sol-gel route.

Right now im mixing the chemicals trying to get my gels but its not going well. Im using "New sol gel route for the preparation of pure alpha-alumina at 950C" by Naoufal Bahlawane, Journal of American Ceramics, 83 [9] 2324-26 (2000) as a basis.

I have mixed the organic solvent (diethylene glycol monoethyl ether), the raw aterial (aluminium isopropoxide) and acetic acid as described in the paper.

He describes how he was a clear sol at the end of the process yet mine is still cloudy. Does anyone have any help for me? This is my first ever sol gel experiment.

Thanks



Replies:
Posted By: nursen
Date Posted: 12 February 2009 at 7:41am
Hello,
 
I used another recipe, the name of the article is " optical high temperature sensor based on green up-conversion emission in Er3+ doped Al2O3" by B. Dong. I had the same problem as you and I heated up the solution. In this way I got the transparent solution.
 
Good luck


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Nursen AVCI



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