Three novel Ba5RNiNb9O30 (R= La, Nd and Sm) ceramics were prepared and characterized in the BaO-R2O3-NiO-Nb2O5 system. All three compounds are paraelectric phas
The silver in some silver-manganese ore with a grade of 3.15 × 10-4 was concentrated by a combined beneficiation technique including magnetic separation, flota