Fig. 1. Schematic diagram of spray granulation^[18]

Fig. 2. SEM, XRD and particle size distribution results of AlON powder after ball milling

Fig. 3. SEM morphology of spraying granulated powders by different solid content slurries. (a) 30 wt%; (b) 40 wt%; (c) 50 wt%

Fig. 4. Schematic diagrams of drying atomized droplets with different solid contents

Fig. 5. Pictures of formed green body

Fig. 6. SEM results of AlON green body formed by different pressures. (a) 150 MPa; (b) 200 MPa; (c) 260 MPa

Fig. 7. Pore size distribution of green body formed by different pressures

Fig. 8. Transmittance of different forming pressures (thickness 2 mm)

Fig. 9. AlON transparent ceramic plate (a) and dome (b) fabricated by cold isostatic pressing and pressureless sintering