Method of producing barium-containing composite metal oxide

摘要

A method for producing a barium-containing composite metal oxide, comprising calcining a mixture of a barium compound and a metal compound comprising at least one metal selected from magnesium, aluminum, europium, manganese, strontium, calcium, terbium, zinc and titanium, or calcining a barium-containing composite metal salt comprising barium and at least one metal selected from magnesium, aluminum, europium, manganese, strontium, calcium, terbium, zinc and titanium, in a gas comprising a hydrogen halide and water vapor.