Carbon real density analysis - Database & Sql Blog Articles

Carbon is a material obtained by deep processing of high-purity high-quality anthracite to change the properties of coal. Its atomic formula is C. Carbon is mainly used in the metallurgical industry: smelting of non-ferrous metals and non-ferrous metals, as well as calcium carbide and phosphorus chemical companies! Carbon products can be divided into carbon products, graphite products, carbon fibers and graphite fibers according to the depth of processing; according to different raw materials and production processes, they can be divided into graphite products, carbon products, carbon fibers, special graphite products, etc. It is a graphite electrode, a carbon block, a graphite anode, a carbon electrode, a paste, an electric carbon, etc., commonly known as a carbon brick or an electric furnace block.
The true density of carbon products is a very important part of the macroscopic physical characterization of such materials. These materials must be tested for their true density and open and closed porosity in manufacturing, transportation and use to determine whether their physical properties are in line with national environmental protection. The need for standards. The true density value according to current national standards is based on the density bottle (pycnometer method) as the basic method for density measurement of such materials. Although the cost of the density bottle method is relatively low, the test process is cumbersome and difficult to grasp, and the temperature of the immersion liquid is high. If the skill is not proficient, the error of the test result is large, and the repeatability is not good.
Based on the ASTM standard D2638-91 (2002) designed and manufactured by the Gas Displacement True Density Analyzer, the inert gas high purity helium gas is used to replace the sample in the sample chamber, which can quickly and accurately test the powder granular sample. Good repeatability, high degree of automation, easy to use, easy to learn and easy to operate. Because it uses inert helium, it does not pollute or damage the sample, and it is easy to recover the sample, which is beneficial to test and analyze the valuable and small sample amount. Practice has proved that the vacuum exhaust treatment can effectively exclude the adsorbed or attached air in the powder particle material. The gas displacement true density analyzer can effectively perform accurate true density test on the substance, combined with external procedures. It is easier to test the opening and closing rate.