In a word? No.
First, an artificer doesn't actually cast spells. At all. He has infusions, which function in similar ways at times and even duplicate spells, but they're not spells, in much the same way that saccharin is very similar to sugar but isn't actually sugar.
Second, activating an item, whether or not it was created in an antimagic field, is also not casting a spell. Thus, the feat doesn't apply. (The creation of items in an AMF is its own problem, and one that requires a little interpretation to determine whether a caster simply expends the slot or actually casts the spell.)
Now, I can see how a lenient DM might allow this. However, going by RAW, it's useless for the artificer (who really shouldn't be in Faerun anyway--I can vouch from personal experience).