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Panthera Leo
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Making Cobalt Blue by Sintering Alumina & Cobalt monoxide...??
Hi,
This is what is written in wikipedia about Cobalt Blue [Cobalt(II) Aluminate] :
"Chemically, cobalt blue is a cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl2O4. The compound is made by sintering the stoichiometric mixture of finely ground CoO and Al2O3 (alumina) at 1200°C"
Source: http://en.wikipedia.org/wiki/Cobalt%28II%29_aluminate"
My questions are:
Does this mean Cobalt(II) aluminate can't be made at 900 or 1000C ? Why 1200?
&
why does it have to be "finely ground" ? (just to increase surface area, in order to increase contact zone? )
Thanks in advance :)
Hi,
This is what is written in wikipedia about Cobalt Blue [Cobalt(II) Aluminate] :
"Chemically, cobalt blue is a cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl2O4. The compound is made by sintering the stoichiometric mixture of finely ground CoO and Al2O3 (alumina) at 1200°C"
Source: http://en.wikipedia.org/wiki/Cobalt%28II%29_aluminate"
My questions are:
Does this mean Cobalt(II) aluminate can't be made at 900 or 1000C ? Why 1200?
&
why does it have to be "finely ground" ? (just to increase surface area, in order to increase contact zone? )
Thanks in advance :)
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