Chemical Forums

Specialty Chemistry Forums => Materials and Nanochemistry forum => Topic started by: Mitch on March 28, 2008, 07:41:16 PM

Title: Yttrium Iron Garnet Synthesis from their Respective Oxides
Post by: Mitch on March 28, 2008, 07:41:16 PM

I have to propose a solid state reaction to make Y₃Fe₅O₁₂

I have suggested: Y₂O₃ + Fe₂O₃ -> Y₃Fe₅O₁₂

I think that is impossible to balance, so would this be a probable chemical reaction equation:
3Y₂O₃ + 5Fe₂O₃ -> 2Y₃Fe₅O₁₂ + 12O₂

Actually, how is it commonly synthesized? I can only find modern sol-gel papers like this one: Influence of Complexing Agents and pH on Yttrium-Iron Carnet Synthesized by the Sol-Gel method (http://dx.doi.org/10.1021/cm970165f)

Title: Re: Yttrium Iron Garnet Synthesis from their Respective Oxides
Post by: Arkcon on March 28, 2008, 07:48:58 PM

Incredible synthesis procedure you've found Mitch, I would have assumed garnet, whether gem-quality or YAG laser material, was made in a furnace out of a slow mix of Aluminum and other oxides.

Title: Re: Yttrium Iron Garnet Synthesis from their Respective Oxides
Post by: Mitch on March 28, 2008, 11:11:50 PM

I believe the most effective synthesis for large YAG crystals is still the normal solid state reactions. But, sol-gel methodologies have been all the rage for the past 10-15 years for all things small and crystalline.

Title: Re: Yttrium Iron Garnet Synthesis from their Respective Oxides
Post by: Arkcon on March 28, 2008, 11:20:32 PM

I always enjoyed reading Crystal Growth in Gel Media by Heinz K. Henisch, that was a great book.  I remember when I had the boss order for me a U-tube.  I showed him the book and what I wanted to do -- I so wanted to grow calcite crystals in an agar gel (never did get that to work).  He said if I could reliably produce 1 mm clear calcite crystals, I'd have a moneymaking machine.  I only wish I could read or download the reference you cited.  :'(

Title: Re: Yttrium Iron Garnet Synthesis from their Respective Oxides
Post by: Mitch on March 29, 2008, 12:14:07 AM

I've added you to the Chemist membergroup, it places beakers under your name and grants access to the hidden chemists only forum. You'll find a treat there for you.

Title: Re: Yttrium Iron Garnet Synthesis from their Respective Oxides
Post by: Borek on March 29, 2008, 03:35:19 AM

Quote from: Mitch on March 28, 2008, 07:41:16 PM

I have suggested: Y₂O₃ + Fe₂O₃ -> Y₃Fe₅O₁₂

I think that is impossible to balance

EBAS rulez ;)

3Y₂O₃ + 5Fe₂O₃ -> 2Y₃Fe₅O₁₂

Title: Re: Yttrium Iron Garnet Synthesis from their Respective Oxides
Post by: Mitch on March 29, 2008, 03:43:18 AM

lol, I tried. Logically too; I must of been keeping to much stuff in my head to think it through correctly.

Title: Re: Yttrium Iron Garnet Synthesis from their Respective Oxides
Post by: Mitch on March 29, 2008, 03:44:25 AM

Plus, it helps keep this forum active. :)