I have never heard of ceramic knives until recently. How strong is ceramic? Why is it even crafted into a knife? According to the Mohs hardness scale, a properly made ceramic knife will be rate about 8 with diamond as the hardest scoring a ten. Stainless steel gives you a rate of about 5. Now, that's something.
Being one of the hardest material on earth does have its advantages. For one the ceramic knife is so hard it can literally slice and slice and slice for years without the need to resharpen. And they don'trust, pit or corrode which suits me just fine since I don't really upkeep my tools. However, I am aware that ceramic may be HARD but they are fragile as well. One drop and the blade will chip. Hence, it is better to keep them in proper places after use.
You can't cut or chop with these knives but they are ideal for chamferring and deburring for plastic kits.