2023-05-17

Special graphite for electric spark processing

Electric spark processing is a new type of processing process in the mechanical manufacturing industry. Electric spark processing can process many metals with large hardness and can be processed. Copper materials can also use graphite materials. Graphite materials used for electrical electrodes used for electrical sparks must have the following conditions:(1) The structure is dense and uniform in tissue, and there should be no coarse particles and large pores;(2) There is a high mechanical strength and good processing performance. It can process complex shapes or sharp corners and thin slices;(3) Graphite tool electrodes, there are certain losses during the processing of electricity, this loss should be as low as possible;(4) The discharge characteristics are stable and the processing speed is fast. Therefore, graphite machining is generally used with graphite structure graphite or exquisite particle structure graphite. It is best to have the same sex in physical properties. Therefore

2023-08-17

Graphite anode plate

Graphite anode is a graphite plate, block, or rod used as an anode for electrolytic cells in the electrolysis industry. It has characteristics such as high temperature resistance, good conductivity and thermal conductivity, easy machining, good chemical stability, strong acid and alkali corrosion resistance, and low ash content.There are two types of electrolysis industry using graphite anodes, one is aqueous solution electrolysis, and the other is molten salt electrolysis. In the past, the chlor alkali industry, which used to produce caustic soda and chlorine gas by electrolysis of salt water solutions, was the largest user of graphite anodes. However, the chlor alkali industry now widely uses the ion membrane electrolysis process for alkali production, and the graphite anode diaphragm method for alkali production has gradually been phased out. Therefore, the production of graphite anodes is in an extremely shrinking state. Currently, graphite anodes are only used in industries such

2024-03-06

Graphite: Uncovering the unique properties and wide applications of this amazing material

Graphite, a seemingly unremarkable mineral, hides a multitude of amazing properties and applications. It is not only an ancient material for writing and painting, but also a key element of modern industry and technology.The unique properties of graphite stem from its layered structure. Each layer of graphite is tightly bound by carbon atoms through covalent bonds, while the layers interact with each other th

2023-06-07

Graphite mineral classification

Graphite's process characteristics are mainly determined by its crystallization form. Crystal forms of graphite minerals have different industrial values and uses. Industry, according to the different crystals, divide natural graphite into three categories.1. Deep crystalline graphiteThe dense crystal graphite is also called block -like graphite. Such graphite crystals are obviously visible to the naked eye. The diameter of the particles is greater than 0.1 mm, which is concentrated in 0.1-1m/g than the surface area. This: Graphite is characterized by high quality. Generally, carbon content is 60-65%, and sometimes 80-98%, but its plasticity and slipperyability are not as good as scales.2. Scales graphiteGraphite crystals are scales; this is made of deterioration under high -intensity pressure, with large scales and fine scales. The characteristics of such graphite ore are not high, generally between 2 and 3%, or 10 to 25%. It is one of the best ore in nature. The floating, lubricabil

2023-07-07

The development and application of battery materials

1. Lithium -ion battery materialLithium ion batteries are currently widely used batteries. The positive electrode materials of lithium -ion batteries are usually lithium iron phosphate, lithium manganate, etc., while the negative electrode materials are graphite or silicon -based materials. In recent years, new silicon/graphite composite materials have gradually been applied.2. Calcium ion battery materialCalcium ion batteries have the advantages of low cost and high energy density, and have been studied in recent years. Among them, ingredients, calcium sulfide and other materials are considered to have potential electrode materials that have potential to become calcium ion batteries.3. Fuel cell materialThe fuel cell material refers to the electrodes, electrolytes, catalysts and other materials used to manufacture fuel cells. The important one is the catalyst. In recent years, precious metals have developed rapidly.4. ion ion battery material ion battery is a high -power, long -life

2023-02-10

Graphite development direction

(1) Renewal of graphite selection and mining technology equipment

Optical and mechanical properties of graphene

Graphene has excellent optical properties, with an absorption rate of about 2.3% over a wide wavelength range, making it almost transparent. Within the thickness range of several layers of graphene, with each increase in thickness, the absorption rate increases by 2.3%. Large area graphene films also have excellent optical properties, and their optical properties change with the thickness of graphene. This is an unusual low energy electronic structure possessed by single-layer graphene. At room temperature, a voltage is applied to a double-gate double-layer graphene field-effect transistor, and the bandgap of graphene can be adjusted between 0 and 0.25 eV. When a magnetic field is applied, the optical response of graphene nanoribbons can be tuned to the terahertz range.When the intensity of the incident light exceeds a certain critical value, graphene's absorption reaches saturation. These characteristics allow graphene to be used as a passive mode-locked laser. This unique absorption

2023-07-18

The effect of battery dedicated graphite as negative electrode on lithium ion power battery fast charge performance

Since its inception, lithium -ion batteries have been widely used in multiple fields. At present, lithium -ion batteries are not only widely used in electronic products such as mobile phones, digital cameras, tablets, but also in the application of vehicle power supply. A certain breakthrough has been achieved; from the analysis of the future development of lithium -ion batteries: Fast charging lithium -ion batteries will become an important research direction for lithium -ion batteries.In order to improve the fast charging performance of the battery -specific graphite negative material, a series of graphite negative materials made of different coke materials were prepared through experiments. It also performed particle size, polarization, and XRD tests, which made a lithium -ion battery rate charging and rate charging. The cycle test and analyzed the test results.The effect of lithium ion power battery fast charging machine and the effect of battery -specific graphite on the battery

2023-08-25

Thermal conductivity of polycrystalline graphite

The so-called carbon materials such as artificial graphite molded products are polycrystalline materials with extremely complex structures, and the basic structure of graphite crystallization has strong anisotropy. Therefore, the macroscopic thermal conductivity of carbon materials, apart from relying on empirical data, is almost unpredictable. The factors that have a significant impact on thermal conductivity include:(1) The differences in the basic properties of the initial raw materials;(2) The manufacturing process - macroscopic anisotropy;(3) Heat treatment temperature - the growth degree of graphite microcrystals;(4) Apparent density, distribution of holes, etc.

2023-09-08

The densification process of carbon graphite materials

With the continuous expansion of the application field of graphite materials, more and higher requirements have been put forward for it. Therefore, it is necessary to introduce new supplementary process methods in industrial production to facilitate the acquisition of products with special properties that cannot be obtained using ordinary methods. This process method is the compaction of carbon graphite materials.Carbon graphite material is a porous material, with a densification process that involves filling the pores or coating surface of carbon graphite material with different forms of carbon, metal, alloy, or other non-metallic substances. The purpose of densification process is mainly to improve the density, strength, conductivity, thermal conductivity, corrosion resistance, and wear resistance of the product, and sometimes to ensure that the product is impermeable to gases and liquids. However, there is a limit to compaction, and it is not possible to require all the pores in th