Here at Knife Sharp we can sharpen and repair all different types of knives, including ceramic knives. While other professional knife sharpening services shy away from ceramic knives, we have the skills and technology to make ceramic knives sharper than new. So, when we get asked ‘can you sharpen ceramic knives’ the answer is a big fat yes!
The best bit is that ceramic knife sharpening and repairs are included in our standard knife sharpening & repair package, so nothing extra to pay even if your ceramic knives are badly chipped or damaged. Happy days!
What makes ceramic knife sharpening different from sharpening other knives?
Ceramic knives have blades that are made of zirconium dioxide, or more widely known as zirconia. Zirconia is extremely hard, nearly as hard as diamonds. When looking at zirconia on the Mohs hardness scale it’s around 8.5 whereas diamonds are 10, and normal steel knives are around 5 to 7. So, you can see they are hard(er) as nails!
Being so hard you can only sharpen and repair them using diamond coated grinding wheels or stones, other standard wheels or stones won’t have any effect on them. Diamond coated wheels and stones are much more difficult to use than standard tools, and as you would expect they are very expensive. This is why most knife sharpening services don’t sharpen ceramic knives. Luckily, we have invested in both diamond wheels and stones, and have the experience to use them correctly to bring your ceramic knife back from the dead!
Due to ceramic knives being so hard they are prone to chipping as they are much more brittle than steel knives. If you own some ceramic knives or you are thinking of getting some, just be aware that you need to be more careful with them. Don’t be chopping anything hard or apply any twisting force to them. While they can stay sharp for longer than steel knives, they are not as robust and don’t tolerate rough handling as well.
We have sharpened and repaired a large number of ceramic knives here at Knife Sharp and in our experience, it is best to go with a big brand such as Kyocera, as some of the cheaper brands use lesser quality zirconia.