the ceramic family
'Ceramic' is a family name, not a single material, the way 'birds' covers sparrows and ostriches. This is a first tour of the household. The great branches are grouped by which nonmetal the metal is joined to: oxides (joined to oxygen), carbides (to carbon), nitrides (to nitrogen), borides (to boron), the vast clan of silicates (built from silicon-and-oxygen units), and glasses (any of these frozen from a melt without crystallising).
Oxides, alumina Al2O3, zirconia ZrO2, magnesia MgO, silica SiO2, are the largest branch: stable, already-oxidised, and mostly ionic, the workhorses of insulators, refractories, and structural parts. Carbides (SiC, B4C, WC) and nitrides (Si3N4, AlN, TiN) are mostly covalent, extremely hard and refractory, used for cutting tools, armour, and high-temperature parts. Borides (TiB2, ZrB2) are metallically conductive, ultra-refractory ceramics for the hottest jobs. Silicates, clays, feldspar, quartz, mica, are the rock-forming minerals and the basis of all traditional pottery. Glasses are the non-crystalline cousins, from window glass to optical fibre.
The family also splits another way that cuts across composition: traditional (clay-based) versus advanced (high-purity, engineered) ceramics. The point of the tour is a mental map: once you can place a new material on the tree ('AlN is a nitride, mostly covalent, so expect hard, refractory, insulating'), you can predict its personality before looking anything up. The branches also blur: sialons are silicon-aluminium-oxynitrides that mix the nitride and oxide worlds, and glass-ceramics are glasses deliberately crystallised. The family has cousins and hybrids, not just clean species.
Given four unlabelled parts, a spark-plug insulator, a knife-sharpening stone, a jet-engine bearing, and a wine bottle, you can name their families: oxide (alumina), a carbide or oxide abrasive, nitride (silicon nitride), and glass, and from the family alone guess each one's hardness and heat tolerance.
Group by the nonmetal partner, oxide, carbide, nitride, boride, silicate, glass, to predict behaviour.
The branches are a guide, not rigid walls. Oxynitrides (sialons), carbonitrides, and glass-ceramics deliberately straddle two families.