| http://www.w3.org/ns/prov#value | - In step P46 the precursor is dried, preferably in dry air or nitrogen, and preferably at a relatively high temperature as compared to the prior art, i.e. at from 200??? C. to 500??? C. Most preferably, drying is performed in air at about 400??? C. for a time ranging from about 2 to 10 minutes.
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