Ceramography is the art and science of preparation, examination and evaluation of
ceramic microstructures. Ceramography can be thought of as the
metallography of ceramics. The microstructure is the structure level of approximately 0.1 to 100
µm, between the minimum
wavelength of
visible light and the resolution limit of the naked eye. The microstructure includes most grains, secondary phases,
grain boundaries, pores, micro-cracks and hardness microindentions. Most bulk mechanical, optical, thermal,
electrical and magnetic properties are significantly affected by the microstructure. The fabrication method and process conditions are generally indicated by the microstructure. The root cause of many ceramic failures is evident in the microstructure. Ceramography is part of the broader field of materialography, which includes all the microscopic techniques of material analysis, such as metallography,
petrography and plastography. Ceramography is usually reserved for high-performance ceramics for industrial applications, such as 85–99.9%
alumina (Al
2O
3) in Fig. 1,
zirconia (ZrO
2),
silicon carbide (SiC),
silicon nitride (Si
3N
4), and ceramic-matrix
composites. It is seldom used on whiteware
ceramics such as sanitaryware, wall tiles and dishware.