A photocatalyst is also called photocatalysis. Simply, a photocatalytic material undergoes light irradiation and does not change itself but can promote other substances to undergo a chemical reaction. There are many examples of photocatalyst reactions around us. The most typical is The chlorophyll, which plays the most important role in photosynthesis of plants, is a photocatalyst. Photocatalysts ...
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Dental restoration parts customization Solution 1. Personalized and complex geometric products are the areas where metal 3D printing technology is best at, ensuring a good match with the patient’s mouth, and the surface roughness of the parts is very suitable for the adhesion between the ceramic outer layer and the body 2. Cobalt-chromium alloy is used for printing materials, which has good biolog...
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The preparation method is one of the key factors affecting the specific surface area of oxide powders. Different preparation methods can lead to differences in the size, shape, and porosity of powder particles, thereby affecting their specific surface area. For example, the sol gel method can prepare oxide powders with high specific surface area, uniform particle size and fine size; The co precipi...
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1. Classification of Scanning Electron Microscopes Scanning electron microscopy can be divided into thermal electron emission type and field emission type according to the different ways of electron generation. The filament used for thermal electron emission type is mainly tungsten filament electron microscopy. Field emission type The distinction between hot field emission and cold field emission....
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The sintering of materials involves at least two processes: densification of the body and growth of grains in the body. The longevity of grains is usually achieved through the movement of grain boundaries. According to the classical theory of grain growth kinetics, the difference in free energy between the two sides of a curved grain boundary is the driving force that causes the interface to move ...
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The essence of sintering is that the powder block is heated in an appropriate environment or atmosphere, and through a series of physical and chemical changes, the bonding between powder particles undergoes a qualitative change. The strength and density of the block increase rapidly, and other physical and mechanical properties are also significantly improved. The performance of ceramic materials ...
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