A ceramic knife is a knife made out of very hard ceramic, often zirconium oxide (ZrO2; also known as zirconia). These knives are usually produced by compacting zirconia powder using high pressure presses which apply a pressure of around 300 tons to produce blade-shaped blanks. These blanks are very brittle and fragile and can be shattered by a slight blow; special binders are used to retain the shape of the blank until the firing process. Like most ceramics these are consolidated into a dense and strong ceramic by solid-state sintering at approximately 1400 degrees

Read more...