Ceramic coffee gear

Ceramic appears in coffee gear in two unrelated places, and lumping them together is how people end up with the wrong idea about both. In a grinder it is the burrs. In a brewer it is the vessel. The considerations have nothing in common.

Ceramic burrs: harder, cooler, more brittle

Ceramic is harder than steel and keeps its edge longer, and it does not conduct heat into the beans the way metal does. That is the case for it, and it is why so many hand grinders use it: in a manual grinder you are turning slowly anyway and longevity matters. The case against is brittleness. A stone in the beans chips a ceramic burr where it would dent a steel one, and a chipped burr grinds unevenly forever. Burr against blade is the bigger question if you are still choosing.

Ceramic burrs or steel: which to buy

Hand grinders favour ceramic: slow rotation, no heat problem to solve, and edge life matters when you are the motor. Electric grinders, especially for espresso, favour steel: it cuts faster and more aggressively, and the geometry that produces a narrow particle spread is easier to make in metal. Neither is universally better and burr SIZE matters more than material in both cases.

Do ceramic drippers hold heat?

A ceramic pour over cone has real thermal mass, which stabilises the brew temperature through the pour. The catch is that the mass works against you at the start: a cold ceramic dripper pulls heat out of the first pour, exactly when the coffee is blooming. Rinse it with hot water before brewing. That step is also what rinses the paper filter, so it costs nothing extra.

Ceramic coffee gear is heavy and it breaks

Ceramic is the heaviest option per unit of brewer and it chips at the rim, which is where you pour. It is a kitchen material rather than a travel one: steel or plastic for anything going in a bag.