Microdesigning of sintered materials with submicrometer-sized particles requires total control over particle-particle interactions during consolidation. Colloidal consolidation routes provide this required control mechanism. Depending on the magnitude of the pairwise potential and the particle concentration, particles in a colloidal suspension interact with each other to display crystal-like, liquid-like, or gas-like phases. The stability regions of these phases are outlined with a one-component phase diagram. The implications of this phase diagram on the microdesigning of ceramics is discussed and illustrated on the basis of experimental work with Al//2O//3 and SiO//2 colloidal suspensions.