2023-08-22

Graphite crucibles have good thermal conductivity and high temperature resistance

Graphite crucibles have good thermal conductivity and high temperature resistance. During high-temperature use, their coefficient of thermal expansion is small, and they have certain strain resistance for rapid heating and cooling. Strong corrosion resistance to acid and alkaline solutions, with excellent chemical stability.But the following points should be noted:1. To avoid damage to the graphite crucible caused by impact or falling from a height. Be careful when using, handle with care, and take a look at the surrounding environment.2. The graphite crucible must be strictly protected from moisture and must be stored in a dry place or on a wooden frame.3. Prevent strong corrosive flames from directly spraying the sides and bottom of the crucible.4. Before use, it is necessary to heat bake and dry

2023-08-24

Graphite product testing

Testing of graphitized blanks and machined products:(1) The detection of mechanical processing quality mainly involves the detection of dimensional accuracy and surface roughness.(2) Detection of chemical composition analysis, analysis of components and their elements, and analysis of sulfur, phosphorus, barium, nickel, titanium, and other trace elements based on different products.(3) General physical performance measurement, including measurement of bulk density, true density, porosity, pore size distribution, and pore size distribution.(4) The detection of structural analysis mainly includes metallographic microscopy, X-ray diffraction, electron microscopy, and graphitization degree measurement.(5) Mechanical performance testing includes the determination of compressive strength, bending resistance, tensile strength, elastic modulus, and hardness. In addition, there are measurements of friction coefficient and wear amount.(6) Electromagnetic performance testing mainly includes the

2023-08-21

High power and ultra high power electrodes

The characteristic of high-power and ultra-high-power electrodes is low resistivity, allowing for a current load of 25% -40% higher than that of ordinary electrodes; The allowable current density is greater than twice; Low coefficient of thermal expansion; High flexural strength; Low oxidation loss. The production of high-power and ultra-high-power electrodes uses needle coke as the raw material, and multiple impregnations are used in the production process to increase the graphitization temperature, and corresponding improvements are made to the bonding and impregnating agents.The requirements for ultra-high power graphite electrodes are relatively strict. The volume density of the electrode reaches 1.72g/cm3; The resistivity drops to 5-7 Ω. mX10-6. Due to the fact that the current density allowed by ultra-high power is more than twice that of ordinary electrodes, the thermal stress and impact it bears increase. Therefore, the electrode requires a low coefficient of thermal expansion

2023-11-22

Classification of graphite powder

High purity submicron graphite particles have a wide range of applications: electronic information display tubes, black conductive coatings in the display manufacturing industry, devices composed of liquid crystal displays, photosensitive black coatings used on sensors and color decomposers, color liquid crystal plasma three primary color boundaries used in flat panel displays to improve emission efficiency and color contrast, and various coatings such as ultrafine tungsten and molybdenum wire drawing, High purity submicron graphite particles are widely used in advanced lubricating oil and grease manufacturing, high-performance battery foam iron nickel manufacturing, photographic film and many other industries.High purity graphite ultrafine powder includes colloidal graphite powder, which is mainly used for pens, powder metallurgy, lubricating oil, grease, dry batteries, conductive coatings, lubricating coatings, scientific research by the National Defense Science and Technology Commi

2023-11-02

Application of Graphene

Graphene makes indoor people feel like they are in a windless "warm winter sun", with both heating and health care. Unlike traditional heating equipment such as air conditioners, oil heaters, and underfloor heaters, graphene heating paintings are more comfortable, energy-efficient, non boring, noiseless, neither oxygen deficient nor light pollution, and are a classic masterpiece of technological change.In addition to covering and insulating the body, traditional clothing only has value left, and there are few high-tech products that appear. Through skill discussions, medical expert Zhiren has independently developed high-tech intelligent heating clothing in the application field of graphene electric heating film, targeting extremely cold areas, outdoor people in winter and spring, people with weak physique, and people who love beauty in winter. The graphene composite film is made into an efficient conductive, thermal conductive, and flexible heating core, which is perfectly

2024-04-01

Diverse applications of graphite: from industry to science and technology

Graphite, as a multifunctional mineral, has a wide range of applications. In the industrial sector, graphite is used as a refractory, conductive material and lubricant, providing important support for industrial production. In the field of science and technology, graphite has shown its unique charm.In recent years, with the development and application of new graphite materials such as graphene, graphite has

2023-08-10

Will room temperature superconductivity become the next graphene

On July 22nd, a South Korean research team published a paper on the preprint website arXiv, claiming to have synthesized the world's first room temperature and atmospheric pressure superconductor, named LK-99.Superconductivity refers to superconductivity. Under normal temperature and pressure, almost all conductors have resistance, resulting in thermal energy loss during current conduction. Superconductors are materials that can conduct current with zero loss due to the disappearance of resistance, and have complete diamagnetism (internal magnetic induction strength is zero), with advantages such as stability, low loss, and fast transmission.Previously, superconducting materials needed to enter the superconducting state at lower temperatures. The keyword "room temperature superconductivity" mentioned by the Korean team in this paper refers to the phenomenon of superconductivity achieved under room temperature conditions. According to the standards of condensed matter physics

2023-04-21

What should be paid attention to when processing refractory materials with flake graphite?

Progress in graphitization process of carbon graphite products

The progress of graphitization process for carbon graphite products is mainly reflected in the following aspects:Process optimization: With the continuous research on the graphitization process of carbon graphite products, optimizing the process flow has become an important research direction. At present, many process flows have been optimized, for example, in the production process of carbon black, by optimizing the preparation process of carbon black particles, the selection of carbon black pigments, and the baking temperature of carbon black, the quality and yield of carbon black products can be improved.Carbon black structure control: During the graphitization process, the particle structure of carbon black has a significant impact on the performance of the product. Therefore, by controlling the structure of carbon black particles, the performance of the product can be improved and the competitiveness of the product can be enhanced. At present, researchers are exploring methods su

2024-03-05

A new chapter for graphite: From traditional materials to a key role in future technologies

Graphite, a seemingly ordinary mineral, has played an important role in human history. From ancient writing materials to modern electrodes, lubricants and new energy materials, the diversity and unique properties of graphite make it constantly adapt to the pace of scientific and technological development.With the progress of science and technology, the application field of graphite is also expanding. In the