Synthesis of zirconium tungstate–zirconia core–shell composite particles (original) (raw)

Zirconium tungstate–zirconia core-shell composite particles were synthesized, utilizing ZrW2O8 with a negative thermal expansion coefficient as the core and ZrO2 nanocrystallites as the shell. The synthesis involved controlling the shell volume through zirconium ion concentration and the rate of precipitation via urea to zirconium ratios. The work aimed to encapsulate ZrW2O8 within ZrO2 to address reactivity issues during ceramic-sintering. However, challenges in achieving the required sintering temperatures due to temperature discrepancies and evaporation of WO3 were noted. These findings contribute insights into enhancing sintering processes and mechanical properties of ceramic composites.