People fired clay figurines thousands of years before they made pots
The oldest known ceramics, from southern central Europe and at least 26,000 years old, are sculpted figures rather than dishes. Everyday pottery became common only around 10,000 years later. Today the same family of fired materials lines mining crushers, armours soldiers and stops cars through ceramic disc brakes.
A ceramic is a hard, brittle material made by shaping an inorganic, nonmetallic substance such as clay and baking it at high temperature; earthenware, porcelain and brick are everyday examples. The name comes from Greek keramos, potter's clay, and the root already appears in Mycenaean Linear B as ke-ra-me-we, meaning ceramic workers. Most ceramics withstand acids and caustic chemicals and tolerate heat of roughly 1,000 to 1,600 °C, and they are usually good insulators, though piezoelectric and even superconducting ceramics break the rules.
Early potters mixed clay with animal products and fired it at up to 800 °C; fragments reach back about 19,000 years. The Corded Ware culture, which spread across much of Europe, is named for pressing rope into wet clay so that firing burned it away and left grooved patterns. The potter's wheel produced smoother, more even vessels, and glazes of silicon, bone ash and similar substances melted into a glassy skin that stopped pots soaking up water.
For archaeologists, broken pottery is gold. Sherds are among the commonest finds, and sorting them by style and shape lets researchers build sequences and date layers by comparison with known assemblages. Technical analysis goes further, examining the temper added to clay, such as shell, granite or crushed old pottery called grog, and refiring samples to classify their colour with the Munsell system, in order to trace where a pot was made.
The weakness of ceramics lies in their bonds. Ionic and covalent bonding leaves few ways for atoms to slip, so the material cracks before it bends, and pores act as stress points, producing sudden catastrophic failure unlike the gradual yielding of metals. Engineers fight back by embedding ceramic fibres that bridge cracks, and by tricks such as crack deflection and transformation toughening. In 2024 researchers reported the first ceramic able to deform at room temperature without breaking. Advanced ceramics like silicon carbide and tungsten carbide resist abrasion superbly.
Source: Ceramic
