How To Sharpen Ceramic Knife Blade. This is easier with steel where there are many materials that are harder, you can use a whetstone, diamond sharpening rod or ceramic sharpening rod to sharpen steel knives. Lateral pressure on the side of a ceramic knife is probably your worst enemy when trying to sharpen a ceramic knife on a stone.
Ceramic is such a hard material it can only be sharpened by diamond. A very thick blade will exhibit great toughness, but no edge angle (regardless of how thin it gets) will ever make the knife a slicer. Slide the ceramic honing rod towards the cutting edge of the serrated knife.
Most of the ceramic knife sharpening rod is made from industrial grade ceramic.
The amount of pressure required to snap a ceramic knife blade in this way is surprisingly less. Apply a small amount of pressure as you slowly slide it. While you are at it, use your right hand to. To take a look at the sharpness of your knife, simply test it by cutting a piece of paper.