Produce large-sized porous ZnO ceramics at a low temperature down to 573 K

Abstract Large-sized porous ZnO ceramics were successfully produced at a low temperature down to 573 K for the first time. The ceramics were composed of pores with a diameter of hundreds of nanometers and intersected ZnO nanosheets with a thickness of tens of nanometers, and their bending strength was up to 41.4 MPa when its porosity was about 43%, which meant that their strength and the bonds between their building blocks were exactly the same as those in the ceramics produced by sintering its preforms at a high temperature.