Salt-assisted Solution Combustion Synthesis And Characterization Of Y-TZP Nanopowders

Due to excellent mechanical properties and biocompatibility, yttria-stabilizedtetragonal zirconia polycrystal(Y-TZP) ceramics are being used as the ideal dentalrestoration materials. Synthesis of Y-TZP nanopowders is vital to fabrication of highperformance ceramic blocks. In the recent years, low-temperature solutioncombustion synthesis of oxide nanopowders has been well investigated, but suchgeneral problems as agglomeration and sintering of particles as well as low specificsurface area have been existing so far.In the paper,(Y2O3)0.03(ZrO2)0.94，(ZrO2)0.94-x(Y2O3)0.03: xTb3+and (ZrO2)0.94-x(Y2O3)0.03: xPr3+nanopowders were prepared via salt-assisted solution combustionsynthesis (SSCS) route for the first time. The effects of sorts and amounts of salts,sorts and amounts of fuels, ignition temperature, calcination temperature and dopingcontent on microstructure and propertied of the products were investigatedsystematically. The results show that well-dispersed, high specific surface area Y-TZPnanopowders can be obtained in one step by SSCS. Compared with salt-free solutioncombustion synthesis,(Y2O3)0.03(ZrO2)0.94increase from55m2·g-1to378m2·g-1inspecific surface area and decrease from13.1nm to2.6nmin particle size,(ZrO2)0.94(Y2O3)0.03:0.04Tb3+increase from33m2·g-1to269m2·g-1in specific surfacearea and decrease from11.7nm to3.0nm in particle size.33m2·g-1.ZrO2)0.925(Y2O3)0.03:0.015Pr3+increase from29m2·g-1to318m2·g-1in specific surface area and decreasefrom13.1nm to3.1nm in particle sizeas a result of the introduction of salt.The sortsand amounts of fuels have obvious effects on the crystalline size, dispersion andspecific surface area of the products. Urine and glycine are among the ideal fuels forsalt-assisted solution combustion synthesis of Y-TZP. Moreover, ignition temperaturehas great influence on the properties of the Y-TZP with500oC as the most suitabletemperature. In summary, salt-assisted solution combustion synthesis promises ofpotential application in synthesis of high specific surface area, well-dispersed ceramicnanopowders on the industrialized scale owing to its simple process, rapid syntheticstep and low energy consumption.