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Ho:Y2O3 ceramics were prepared using co-precipitated powders, with ammonium sulfate as dispersant. Y3+ was co-precipitated together with Ho3+ and Zr4+ to produce precursors, which were calcined at 1100–1400°C to produce yttria-based powders. At calcination temperatures of ≤1300°C, agglomeration of powders was not observed. When the temperature was increased to 1400°C, severe agglomeration was detected...
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