Getting to know "Klin Furtunire"
What is Kiln Furniture? Some people just call it furniture. It is not wrong. It's just a shorten word and it is known among potters and people who use ceramic kilns or electric ceramic kilns.
But if you want to explain easily furniture in the kiln isa special type of ceramic that is in one of the refractory materials that can withstand high heat. At the same time, it is able to maintain its physical properties in a ceramic kiln environment. The furniture in the ceramic kiln is made from a special type of ceramic that is highly resistant to heat. Serves to support and protect the product during the high temperature firing process.
In general, the furniture in the kiln refers to various parts in the kiln such as kiln cars, product racks and rollers in continuous kilns, etc. The selection of furniture in the kiln must be made of materials that can withstand heat in the firing temperature range as well as resistant to heat and to the combustion atmosphere without bending. The workpiece material should not be very thick and should weigh less to avoid heavy pressure and not heated when used at high temperatures.
Ceramics for furniture in kilns include
Alumina-Silica > Widely used ceramics for high temperature applications. It is a material in the alumina-silica system. Most have some crystalline or amorphous structures connected by glass. The refractory materials in this system may be divided into three groups according to the alumina content: silica, alumino-silicate and high alumina.
Silicon Carbide > There are mainly three types of silicon carbide products on the market: second phase bonded silicon carbide, reactive bonded type and annealed type popularly called new crystallized silicon carbide. When comparing the properties of the three types, it was found that the load-bearing distance and the thickness were a function of the strength of the material. As the strength of the material increases, the density of the furniture in the kiln can be increased and the load capacity increases. Although the price increases with the quality of the material, the results in terms of productivity and energy consumption help to reduce the costs incurred in using this material.
But when comparing the properties of silicon carbide and alumina silicon carbide, It is likely to be used more because it is a stronger material. Relatively low price and can be used with fast firing cycles
However, silicon carbide deteriorates rapidly in an oxidizing atmosphere and reacts with many ceramic-making compounds. While alumina is inert to firing of most materials and can be produced with a smooth finish, it costs more and is lower in strength.
The most important factor in determining which kiln furniture should be used.
I must say that it depends on the price and service life because it directly affects the production capacity and energy costs. Therefore, it is likely that enterprises producing sanitary ware, crockery, electronic mats and ceramic products, etc. will need to re-evaluate the refractory materials used in the kiln in order to increase production capacity energy efficient and increase the ratio of workpieces to furniture in the kiln to improve product quality after firing for easy sorting and conveying for breeding. It can also increase the life of the furniture in the kiln.