How to determine the quality of carbon black, and whether there is a relationship between carbon bla

The structural degree of carbon black determines its reinforcing properties and the physical properties of the final rubber product.

The most basic requirements are iodine absorption value, oil absorption value, compression oil absorption value, coloring, 300% fixed extension, refer to GB-2003-3778 for details

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Carbon black content: Carbon black content refers to the mass or volume percentage of carbon black added to a material. Carbon black is often used as a filler that is added to a material to alter its properties, such as improving electrical conductivity, increasing strength, and wear resistance, among others.

Ash: Ash refers to the percentage of mass or volume of non-organic matter that remains during thermal decomposition or combustion. Ash is mainly composed of minerals, oxides, metal oxides, etc., which come from the raw material itself or are introduced during processing.

Although carbon black itself is a carbon material, some ash may be introduced during the preparation process, especially impurities or residues that may occur during the carbon black production process. Therefore, the ash in carbon black refers to other impurities besides carbon.

Although there is a relationship between black carbon content and ash content, it is not absolute. Increasing the carbon black content does not necessarily lead to an increase in ash content, as the quality and purity of carbon black can vary depending on the company, production process and processing conditions. In addition, measures may be taken when preparing materials, such as Zheng mu screening or treatment, to reduce the ash content.

Therefore, when using carbon black, it is necessary to balance the relationship between carbon black content and ash content according to the specific application requirements, and select a carbon black material with the appropriate quality and purity.

Although there are many indicators of conductive carbon black, there are not many indicators related to moral performance, mainly including: carbon black particle size, oil absorption value, specific surface area, surface volatiles, ash and moisture.

The relationship between the oil absorption value index and the conductivity of conductive carbon black: the size of the oil absorption value of carbon black represents the structure of carbon black aggregates. Therefore, the choice of carbon black with good conductivity depends on the carbon black products with high carbon black oil absorption value.

The relationship between the particle size index and conductivity of conductive carbon removal black: theoretically, the smaller the particle size of conductive carbon black, the more particles per unit volume are state, which is conducive to improving the conductivity of Jujube, which is normal in conductive products for rubber, but when used in conductive plastic products, if the carbon black particles are too small, because the shear force after plastic plasticization is small, so the dispersion is poor, and the carbon black exists in the base material with a large number of small clumps, which reduces the mechanical properties of conductive plastic products and loses practical value. Therefore, although the particle size of carbon black can affect the conductivity, it also depends on what kind of product the carbon black is used in.

The relationship between the volatile matter index and the conductivity of the conductive carbon black surface: the volatile matter on the surface of the carbon black is mainly formed by some organic groups and the oil film that cannot be completely cracked, forming an insulating layer, increasing the potential barrier between the carbon black particles, seriously affecting the conductivity, and the volatile matter must be controlled within a low limit.

The relationship between the specific surface area index of carbon black and the conductivity: the specific surface area index of carbon black is divided into nitrogen adsorption surface area and ctab surface area, both of which will affect the conductivity of carbon black.

The relationship between the ash and moisture indexes of conductive carbon black and conductivity: the high ash and moisture content in carbon black actually reduces the content of carbon black, which also has an adverse impact on conductivity, and it is necessary to pay attention to controlling the ash and moisture content in carbon black when choosing carbon black.

Superconductive carbon black has a larger spacing of graphite layers than graphite, and its density is smaller than that of graphite. Therefore, the density can be determined by different methods, and the representative test methods are X-ray diffraction and helium substitution. Different test methods determine different product densities, let's take a look:

One is true density, which is determined by the elements and structures (or crystal structures) that make up superconductive carbon black, and the density of the product refers to the true density unless otherwise specified.

The other is the pouring density or apparent density, which varies with the processing conditions of superconducting carbon black and needs to be determined frequently. The apparent density mainly provides a basis for the volume calculation of engineering equipment and packaging, storage and transportation containers.

Replacing all or part of the quenching water with a quenching boiler before the air preheater can significantly reduce the amount of quenching water and exhaust gas to 950 C, thereby further reducing energy consumption, increasing production capacity and increasing air preheating temperature is an important measure for energy saving in carbon black production. However, the higher the air preheating temperature, the higher the requirements for the structure, materials, production operation and control of the air preheater, and the higher the cost.

The density determination of superconductive carbon black plays a decisive role in industrial production, and now the improvement of measurement technology, the utilization rate of the product is also improving, through the above we know that in order to better increase production, Xinxiang Delong conductive carbon black factory recommends that you use the second test method.

Hope it helps, thank you!

The main quality indicators and units of measurement of white charcoal lead burning black lead hands are as follows:

Specific surface area (bet method).

The average primary particle size of m2 g was aroused.

nm bulk density.

Different manufacturers have different methods).

Carbon content. wt.%

Moisture content. wt.%

Burn loss. Generally, the material is burned at 1000 for 2 hours) pH value. SiO2 content.

wt.% Packing Specifications. Wait a minute.

Activated carbon adsorption method is the most widely used, the most mature, the safest, the most reliable and the most diverse method of absorbing the most kinds of substances at present. Although there can be many varieties of activated carbon in terms of appearance and use, activated carbon has a common characteristic, that is, "adsorption". The higher the adsorption value, the better the quality of the activated carbon.

How to easily identify the adsorption value of activated carbon?

a, look at the density: with your hand, the more pores of the activated carbon, the higher the adsorption performance, the density is small, and the feel is light.

B, look at the balance of bubbles: put a small handful of activated carbon into the water, produce a series of extremely small bubbles, pull out a small bubble line, the air barrier will emit a slight bubble sound at the same time, the more intense this phenomenon occurs, the longer the duration, the better the adsorption of the activated carbon bucket.

Carbon black is carbon black.

1] (carbon black, also known as carbon black) is an amorphous carbon. Light, loose and very fine black powder, with a very large surface area ranging from 10 to 3000 m2 g, is the product of incomplete combustion or thermal decomposition of carbon-containing substances (coal, natural gas, heavy oil, fuel oil, etc.) under the condition of insufficient air. Specific gravity made of natural gas is called "gas black", oil made of "lamp black", and acetylene made of acetylene is called "acetylene black".

In addition, there are "groove black" and "furnace black". According to the performance of carbon black, there are "reinforcing carbon black", "conductive carbon black", "wear-resistant carbon black" and so on. It can be used as a black dye for the manufacture of Chinese ink, ink, paint, etc., and is also used as a reinforcing agent for rubber.

Carbonblack carbon black is a kind of amorphous carbon, is a light, loose and very fine black powder, is made of coal tar, anthracene oil lamp carbon-containing substances in the case of insufficient air incompletely combustion, can be used in rubber products to fill a large number of rubber products, increase the wear resistance and weather resistance of rubber products, can also be used in some masterbatch, paint, ink and other dyeing industries, as a black pigment [Furui carbon black] can also be used in plastics as an antistatic agent.

Carbon black is a form of carbon that is powdery.