Alright I got a tough one for all you knife buffs out there. I have to do a report on ceramic knives, for college. So I've found everything there is to know about ceramic products except for how they're manufactured and treated. After asking around, I quickly found that my kyocera rep is a moron, and told me to contact their japan headquarters. All I know is that they contain the elements zirconium oxide and alumini oxide. That's it. Any help would be greatly appreciated.
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ceramic composition??
- Thread starter sledheavy
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- May 9, 2000
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Here is a little information that I got from one website. The Kyotop is a series of Kyocera kitchen knives.
"The KYOTOP blade is made from the same material as the other knives but actually goes through one more step in the manufacturing process. The blades are pressed under enormous pressure called Hot Isostatic Pressing (HIP) in which the blade is molded and fired simultaneously. This process uses a carbon mold, which stains the blade black. The HIP zirconia edge is 2X more resistant to chipping or damage. First, Kyocera molds ceramic powder into blade "blanks" using special high pressure presses, often many tons. Special binders in the powder allow the blanks to retain their shape before sintering or firing, which takes several days at extremely high temperatures (in excess of 1000 degrees Celsius). They then grind (on a diamond wheel) and polish the sintered blanks to form an edge and the final shape before attaching the handle.
Hand-crafted in Japan, each knife is sintered at extreme temperatures in a sealed vacuum for over 24 hours at 20,000 tons of pressure. This pressurized-firing method increases the density of the blade, producing the highest grade of ceramic available. Each knife is then subjected to a multi-part process including tumbling, diamond-belt grinding, diamond-wheel honing, and buffering. Lastly, the sashimi knife is precision polished to a mirror-finish similar to that of ceramic watchbands used by prestigious Swiss manufacturers."
"The KYOTOP blade is made from the same material as the other knives but actually goes through one more step in the manufacturing process. The blades are pressed under enormous pressure called Hot Isostatic Pressing (HIP) in which the blade is molded and fired simultaneously. This process uses a carbon mold, which stains the blade black. The HIP zirconia edge is 2X more resistant to chipping or damage. First, Kyocera molds ceramic powder into blade "blanks" using special high pressure presses, often many tons. Special binders in the powder allow the blanks to retain their shape before sintering or firing, which takes several days at extremely high temperatures (in excess of 1000 degrees Celsius). They then grind (on a diamond wheel) and polish the sintered blanks to form an edge and the final shape before attaching the handle.
Hand-crafted in Japan, each knife is sintered at extreme temperatures in a sealed vacuum for over 24 hours at 20,000 tons of pressure. This pressurized-firing method increases the density of the blade, producing the highest grade of ceramic available. Each knife is then subjected to a multi-part process including tumbling, diamond-belt grinding, diamond-wheel honing, and buffering. Lastly, the sashimi knife is precision polished to a mirror-finish similar to that of ceramic watchbands used by prestigious Swiss manufacturers."