Properties and Classification of Aluminum Powder and Aluminum Slurry

Aluminum silver powder - Properties and classification of aluminum powder and aluminum powder slurry Claiming agency: Silver arrow aluminum silver powder

（1） Characteristics of aluminum powder Aluminum is a silver gray metal, which is relatively suitable for separating agents and making pigments. Aluminum powder slurry is a mixture of pigment aluminum powder and solvent. Its use and characteristics are roughly the same as that of aluminum powder. Due to the 26.98 mass, 2.55 relative density, the melting point of 99.5% pure aluminum is 685 degrees, the boiling point is 2065 degrees, and the latent heat of melting is 323kj/g. Aluminum is reducible, very easy to oxidize, and gives off heat during the oxidation process. During rapid oxidation, 15.5 kj/g heat is released per gram. Aluminum is a ductile metal and easy to process. The oxide film on aluminum surface is transparent and has good chemical stability. Aluminum powder used for pigment refers to particles in the form of flakes, and the surface coating treatment is simple to use, so the output and dosage are larger.

（2） Compared with other pigments, aluminum powder for pigments has more characteristics, which are shown in the following aspects: 1. The characteristics of scale like covering. Aluminum powder particles are scale like, and the ratio of their diameter to thickness is about (40:1) - (100:1). When aluminum powder is dispersed on the carrier, it has characteristics parallel to the substrate. Many aluminum powders are connected with each other, and the large and small particles fill each other to form a continuous metal film, covering the substrate, It also reflects the light outside the coating, which is the unique hiding power of aluminum powder. The covering power of aluminum powder depends on the surface area, that is, the diameter thickness ratio. Aluminum is stretched in the process of grinding, the diameter thickness ratio is increasing, and the hiding power is also increasing. 2. The shielding characteristics of aluminum powder The aluminum powder dispersed in the carrier floats, and the result of its movement is always to make itself parallel to the substrate coated by the carrier, forming a continuous aluminum powder layer, and this aluminum powder layer is arranged in parallel in multiple layers in the carrier film. The pores between each layer of aluminum powder are staggered, cutting off the capillary pores of the carrier membrane, and the external water and gas cannot pass through the capillary pores to reach the substrate, which is characterized by good physical shielding of aluminum powder. 3. The characteristics of aluminum powder reflecting light Xuyang aluminum powder is made of aluminum with light color and high metallic luster. Its surface is smooth and clean, reflecting 60% - 90% of visible light, ultraviolet light and infrared light. Objects are coated with paint containing aluminum powder, and its surface is silver white and bright,. 4. The "two-color effect" characteristic of aluminum powder is that aluminum powder has metallic luster and is parallel to the coating. In the carrier containing transparent pigment, the glossiness and color depth of aluminum powder change with the change of the incident angle and angle of view of the incident light, which is called the "two-color effect". The aluminum powder is arranged in different layers in the coating. When the incident light shines on each layer of aluminum scale, the reflected light is obviously different in brightness because it is weakened differently when passing through the coating with different thickness. When the light shines into the film containing transparent pigment and aluminum powder, the incident light passes through the pigment particles and becomes colored light, which is reflected by aluminum powder at different levels, and the hue and metal light will change. The incident light and angle of view gradually shift from vertical, and the light passes through pigments with different particle numbers and aluminum powder with different particle sizes. The hue and metal light of the reflected light will also change infinitely. This characteristic of aluminum powder has been widely used in coatings as hammer paint or metallic paint. 5. Floating characteristics of aluminum powder A large variety of aluminum powder and aluminum slurry for pigments are floating, which are characterized by scale floating on the surface of the film. Hunan Jinhao Aluminum Industry Co., Ltd. specializes in solar energy electronic paste, aluminum silver paste, refractory materials, welcome to inquire!