When we hear ceramic knives, is the first impression that they are fragile, like teacups/bowls, they will shatter once dropped from a height? So what are ceramic cutting knives, are they Alumina Ceramic as fragile as pottery like teacups/bowls? Next we introduce the difference between the two.
01The raw materials are different
The main raw material of pottery such as cups/bowls is clay, while the ceramics used in cutting tools are based on high hardness and chemically stable raw materials, such as aluminum oxide Al2O3 and zirconium dioxide ZrO2. They are made from raw materials that are much harder than clay.
02Different molding methods
Pottery such as teacups/bowls are mostly made by Zirconia Ceramic Block hand or hand-made utensils. The ceramic tool for cutting is to put the raw material into a special mold, and then use special equipment to stamp and form at a pressure of about 1 to 2 tons per square centimeter, thereby eliminating the gap between the particles and forming a high-strength ceramic tool material.
03 Different sintering temperatures
Pottery such as teacups/bowls are sintered at a relatively low temperature of about 900~1300°C, while ceramic tools used in cutting are sintered at high temperatures above 1500°C. In addition, the sintering temperature and sintering time are strictly controlled to ensure the production of High-quality, high-performance ceramic knives.
The same is ceramics. Due to the above-mentioned differences in raw materials and production processes, ceramic knives have two excellent characteristics.
Let's take a look at how ceramic tools can take advantage of these properties in high-speed machining. High hardness is maintained even in high temperature environments.
Most materials soften when heated, and so do cutting tools. The Alumina Ceramic Plate higher the ambient temperature, the greater the reduction in material hardness. The hardness of cemented carbide and cermet will drop to about 35% of the normal temperature state at 1000 °C.
And ceramics (white porcelain HC1, black porcelain HC2, silicon nitride ceramics SX6) have a much smaller decrease in hardness under the same conditions. In particular, the Alumina Ceramic Bar silicon nitride ceramic SX6 material, even when the temperature reaches 1000 ℃, its hardness can still be maintained at about 73% of the normal temperature state.
High flexural strength is maintained even in high temperature environments.
Compared with traditional metal knives, ceramic knives are light to use, free from rust, not easy to passivate, more environmentally friendly, and have a longer lifespan. They have become the preferred choice of many contemporary people.
Are ceramic knives as fragile as ceramic teacups, ceramic bowls, and other ceramic products?
2022 07/07