how-are-ceramic-knives-made

Ceramics have high hardness and wear resistance, which is very good for making ceramic knives. However！ Nothing is perfect in this world. Hard materials tend to be brittle, so a little carelessness may cause it to fall to the ground with a crisp sound.

(Even more terrible is this terrazzo pattern stove, because even if a bit of ceramic pieces fell on it, it could not be found!)

While you can't cut and chop hard ingredients (like bones), cutting up meat is a fantastic artifact. Let's look at the making of ceramic knives today.

Real Diamond

The raw material for making ceramic knives comes from the mineral "Zirconium" stone, which is the black sediment when mined.

When it comes to technical terms, you may be confused...Let's recall the cheap cubic zirconia diamonds we bought at the street vendor to wear for fun. It's not expensive, but it's very similar to the "cubic zirconia" of real diamonds. (As if to hear Hou boss in TV shopping hoarse shout: As long as 998, you can take eight heart eight arrows home!）Ceramic knife material "zirconia" is such a raw material, but the production method is different ~

Ore refining

Refining ore is too complicated... We'll have to quickly skip this one...

In short, the result of refining the mineral is an extremely pure zircon powder like the one shown below.

After physical and chemical processing, it can be turned into zirconia powder.

Add metal powder

Although the material of ceramic knives is not metal, many manufacturers will add metal powder in the production process to increase the strength of the knife body and for the safety of urban life. However, when the ceramic knife goes through security, the metal detector will sound. Why would I know, because I was deducted once...

High-pressure powder flushing

The material powder is first pressed into a stable knife shape by high-pressure molding. If we go to the beach and give the sand a good squeeze, it will temporarily set (though due to the moisture). In the same way, as long as the power is large enough, such as 300 tons of punching machine, the powder will also give you a temporary "press" solid, only temporary!

When temporarily set, it is necessary to enter the firing process.

Grinding of diamond

Ceramic knives are harder than the average whetstone because zirconium dioxide has a hardness of 8.7, while diamond, the hardest natural substance in the world, has a hardness of 10. Therefore, to sharpen the ceramic knife, it is necessary to use a grinding wheel attached to a diamond to polish the ultra-high hardness of the ceramic knife.

There is a process of automatic polishing by machine, but the video I found is still relatively backward. It uses manual polishing, and the thickness of the blade polishing needs to be seen manually through the way of light transmission.