How a graphite carbon tester can be non-destructive

　　Resonance peaks can be observed visually on the material, but also on the same interface (if the specimen has layer cracks, large defects will appear resonance peaks); the use of imported high-precision, stable sensors and data processors; the use of foreign advanced software, data analysis accuracy, friendly operating interface.

　The Graphite Carbon Tester is used to test the modulus of elasticity of materials including ceramics, concrete, cement, glass, metals and alloys, plastics and polymers, rocks, wood and composites, etc. It has a wide measurement range and is easy to operate, and can simultaneously obtain dynamic Young's modulus of elasticity, shear modulus of elasticity, Poisson's ratio and the elastic properties of materials at different temperatures.

　　The graphite carbon tester is used to measure the sample pulse excitation signal through a suitable external force. When a frequency in the excitation signal coincides with the intrinsic frequency of the sample, a resonance is generated, which has a large amplitude and a long delay, and this wave is converted into an electrical signal through the transmission of a test probe or acoustic sensor and sent to the instrument to measure the intrinsic frequency of the sample, and the Young's modulus E, shear modulus G and Poisson's ratio U are calculated by the formula.

　　Graphite and its composite materials have the characteristics of non-melting at high temperatures, good electrical and thermal conductivity and excellent chemical stability, and are widely used in metallurgy, chemical industry, aerospace and other industries. Especially in recent years, with the rapid development of lithium batteries, further increase the demand for graphite materials. The quality of graphite has a great impact on the performance of the battery. Industry often calcine, crush, roast and high temperature graphitization of carbon raw materials to obtain high-performance artificial graphite materials.

　　The degree of graphitisation, i.e. the degree to which the carbon atoms form a dense row of hexagonal graphite crystal structure, is higher the closer the lattice size is to the dotted parameters of ideal graphite. The lattice parameters of a carbon crystal can then be used directly to characterise its graphitisation.

　　The graphite carbon detector can be used for non-destructive testing, and the specimen can be used for other tests after the test; non-contact detection, no coupling to the specimen is required, and the surface of the specimen is clean after the test; there is no need to continuously output a sine wave signal with a frequency ranging from small to large to the transmitting probe (the internationally respected method is used here); the test is accurate, simple and fast to operate.