| abstract |
A method for producing a barium-containing compositenmetal oxide, comprising calcining a mixture of a barium compoundnand a metal compound comprising at least one metal selectednfrom magnesium, aluminum, europium,nmanganese, strontium, calcium, terbium, zinc and titanium, orncalcining a barium-containing composite metal salt comprisingnbarium and at least one metal selected fromnmagnesium, aluminum, europium, manganese, strontium,ncalcium, terbium, zinc and titanium, in a gas comprising anhydrogen halide and water vapor. |