Isostatic Graphite Block

Isostatic graphite blocks

Isostatic graphite block is very outstanding in electric conduction. Electrical conductivity is fit for power application. It keeps up stable performance even at temperatures higher than 3000°C. This material also maintains strength and does not deform under such high temperatures.

• Chemical resistance

This kind of isostatic graphite block can bear erosion from strong acid, base, and oxidant. Therefore, it can be used for chemical reactors, pipelines, and other applications under extreme circumstances.

• High strength

Isostatic graphite blocks have high tensile strength and low density. Isostatic graphite blocks reduce energy consumption in transportation and aerospace applications. This material is strong yet lightweight. It can support heavy loads while maintaining structural efficiency.

• Excellent Isotropy

Isostatic graphite has an isotropy level value between 1.0 and 1.1. The uniform properties in all directions make it suitable for precision applications.

• Large size and fine structure

Isostatic graphite block materials have characteristics of big size and find structure. Pressing isostatically can maintain uniform density and minimize the risks of cracking; besides, some complicated shapes can be processed.

• High Homogeneity

Material structure shows highly uniformity. The pressure in every direction inside an isostatic graphite block is even so that the volume density, resistivity, strength of the isostatic graphite block can keep unanimous.

Classification of isostatic graphite

There are two types of classification of isostatic graphite, which include classification based on shape and raw materials. For the classification based on the shape, the kinds are circular isostatic graphite and rectangular isostatic graphite. According to the classification on the raw materials, it can be divided into asphalt coke isostatic graphite and petroleum coke isostatic graphite.

Casting Process of Isostatic Graphite Blocks

Raw Materials

The raw materials for isostatic graphite blocks will be petroleum coke, pitch coke and mesophase carbon microspheres. Petroleum coke is added for graphitization. Pitch coke serves to increase the strength. Coal tar pitch has the function of bonding these materials into a sticky paste.

Karıştırma ve yoğurma

Mix graphite powder mixed with a binder in a certain proportion. The aim of the mixing process is just to ensure uniformity of material before calendering and grinding.

Kalıplama

The cold isostatic pressing may be used for precise molding of graphite. Such a process might improve the graphite products’ processing with high precision as well as reducing the defects of the products that result during the processes.

Grafitleştirme

This step converts carbon into graphite at temperatures above 1800°C. This controlled process also improves the material’s high electrical conductivity and stability.

Casting application

First, the heating of the metal to the melting point to form a liquid; then inject the liquid metal into the graphite mold. Finally, wait for the metal to cool and solidify, then take out the molded parts. Isostatic graphite blocks have excellent high-temperature performance. Therefore, during the casting process, the chemical reaction of metals and the adverse reaction of the material during the casting process is reduced.

Isostatic graphite block Applications

Silicon Growth and Casting Heaters

Isostatically pressed graphite blocks are used in the production of CZ single crystal and multicrystalline silicon. It is also used for crucibles, heaters, electrodes and insulation shields. Graphite heaters can withstand the extreme high temperature, which will enable photovoltaic cells to grow and cast silicon.

Nuclear industry

Because graphite moderates neutrons and reflects heat in high-temperature gas-cooled reactors. Isostatic graphite blocks resist mechanical stress. This material is also one of the durable materials for the plasma-facing wall in nuclear systems.

Electro-discharge machining

Graphite electrodes work well in EDM and can precisely machine precision molds and parts. The excellent conductivity of graphite produces stable discharges in EDM, which also ensures the efficiency and accuracy of the machining. Graphite electrodes are of good durability during high-temperature discharge, which will also extend the service life of the product.

Non-ferrous metal casting molds

Isostatic graphite KALIPLAR are indispensable in the continuous casting of non-ferrous metals like bakır, aluminum, zinc, etc. The material properties of thermal stability and self-lubrication make the production of isostatic graphite blocks smooth.

Why choose our isostatic graphite blocks?

Our isostatic graphite blocks are characterized by great electrical conductivity, thermal resistance, chemical stability, fine structure, high strength, and purity that satisfy photovoltaic, machinery, and nuclear power industrial demands. These isostatic graphite blocks are very durable and cost-effective to reduce operational expenses. We offer competitive prices, making our isostatic graphite block a suitable choice for their various applications.