Detecting the particle size of ceramic powder by laser particle size measurement

Abstract: For the ceramics industry in 2013, the global market for construction ceramics machinery is still in high demand. The main impact on China is the country ’s overall economic situation. In 2013, the overall situation for the ceramics industry is neither good nor bad. The current real estate regulation is still continuing, and the ceramic industry's production capacity has clearly beat the output.

The pace of economic recovery in Europe and the United States is relatively slow, which is not good for the ceramic market. However, with the further promotion of China's construction and the relatively loose monetary policy in 2013, China's overall economic growth is on the rise, and China's ceramic products have strong international competitiveness. It is expected that the overall development of our ceramic industry will be stable in 2013, and the output will increase slightly, which is estimated to remain around 5%.

With China's accession to the WTO, the Chinese market has become increasingly integrated with the world market. The international ceramics market has the following new features such as fierce market competition, high-end and artistic market demand; market sales matching, diversified and personalized demand. With the unprecedented rapid development of China's ceramic industry, the international development of China's ceramic products is facing a severe test. First, low-price competition has caused the industry to continue to reshuffle; second, the tariff protection policy has gradually been relaxed; third, international giants have seized the competitive advantage through domestic OEM production; fourth, the export tax rebate policy curbs the export of ceramic tiles; fifth, the threat of anti-dumping is also very serious serious. Domestic ceramic enterprises are competitive, and China's ceramic machinery enterprises still have a relatively scattered market share and low industry concentration. It is still difficult to form an effective competitive advantage in the international market. Although pottery equipment enterprises have achieved certain results in export in recent years, generally speaking, they have not opened up in mainstream international markets such as Europe and the United States.

Structural ceramics have the characteristics of superior strength, hardness, insulation and high temperature oxidation resistance. Under the very severe environment or engineering application conditions, the high stability and excellent mechanical properties exhibited have gradually expanded in the material industry. Structural ceramics mainly refer to a large class of new ceramic materials that exert their mechanical, thermal, chemical and other properties. It can serve in many harsh working environments, and thus has become the key to the realization of many scientific technologies. Special structural ceramics is an important branch of ceramic materials. It has high temperature resistance, high strength, super hardness, wear resistance and other properties, and has important applications in metallurgy, energy, machinery and other fields. Silicon carbide ceramic is one of the more important ones.

The preparation of ceramic materials usually goes through three processes: raw material preparation, green body forming and firing process, and in the relationship between the three elements of materials science and engineering technology research, the physical and chemical properties of ceramic powder will determine the ceramic The final microstructure and special properties of the material, so the quality of the powder is the basis for the preparation of high-performance ceramic materials. The so-called ceramic powder is a collection system of a large number of solid particles, which represents a state of existence of the substance. The particle size of the solid particles constituting the powder has a great influence on the properties of the powder system, especially when the particle size of the powder reaches the nanometer level, because the specific surface area is greatly increased, the surface energy increases rapidly, and the sintering activity Greatly improved, these changes will bring about sudden changes in the preparation of ceramic materials and the final material properties, thereby broadening the wider use of ceramic materials. How to characterize nano-powders, conventional test methods are no longer applicable, so new test methods must be explored to obtain the desired characterization results.

In the production process of building sanitary ceramics, clay, quartz and quarzite raw materials all need to be processed into powder particles. Dry pressed powder and grouting molding slurry have particles, and powder particles are also present in ceramic color glaze. The size of the particles will directly affect the performance of the product. The particle size of the ceramic powder is an important indicator. The particle size and distribution are related to the processing time of the raw materials, the density of the green body, and the level of the firing temperature. They play an important role in the quality and performance of the product. Therefore, in the processing and application of various powders, particle size testing is very important. In the production of inorganic materials, the particle size ratio of raw materials has a greater impact on the strength and process performance of the product. Generally, the particle ratio of raw materials should be controlled by monitoring the particle size of the raw materials.

Zibo Siyuan Taisheng Ceramic New Material Co., Ltd. is a comprehensive company integrating production and research of related products such as forging machinery, fine ceramics and composite refractory materials. It has a research and development system composed of senior professional and technical personnel in various industries and well-known domestic universities. It is widely used in industries such as building materials ceramic factories, oil refineries, chemical plants, oil extraction plants, mining plants, power plants, etc.

In the production of ceramic materials, finely milled powders are usually used to form products by different methods. Changes in the production of finished products, especially during their sintering, depend in many ways on the properties of the initial powder. First of all, it has a lot to do with its granularity. Our well-known particle size measurement methods include: sieve analysis method, material layer gas permeability measurement method, microscope measurement method, pulse method and so on. The most promising one is the laser method. In the case where the average particle size is the same, the particle size composition (that is, the particle size distribution) of the ground agglomerates is basically the same. Among them, the laser particle size analyzer developed and produced by Jinan Weina Particle Instrument Co., Ltd. enjoys a good reputation in the ceramic industry, and its performance and quality are unanimously praised by customers in the ceramic industry. The average particle volume size obtained by laser particle size measurement can be used as a value for evaluating the particle size of the ground ceramic powder, and the process characteristics and finished product performance can be determined according to this value.

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