As an important physical property of powders, specific surface area refers to the total surface area per unit mass of oxide powder. And its size is influenced by various factors. Firstly, particle size is an important factor affecting the specific surface area of powders. The smaller the particles, the larger the specific surface area. This is because the smaller the particle size, the larger the surface area of each individual particle, thereby increasing the total surface area per unit mass of powder.
Copper and copper alloys have excellent physical and chemical properties, such as high conductivity, thermal conductivity, and corrosion resistance, and are widely used in the power industry, thermal management systems, nuclear power plants, and aerospace industry. High strength, wear-resistant, and corrosion-resistant copper alloys are used for automotive parts and daily necessities.
Antibiotics refer to drugs that can inhibit bacterial growth, damage their living environment, and effectively and continuously exert their effects. Antibacterial agents are divided into two categories: organic antibacterial agents and inorganic antibacterial agents. Among them, organic antibacterial agents include natural and synthetic types, while inorganic antibacterial agents mainly include metals, metal ions, and oxides. The commonly referred to antibacterial measures include inhibition, killing, elimination of toxins secreted by bacteria, and prevention. Due to the strong thermal stability, long-lasting functionality, and safety and reliability of inorganic antibacterial agents, coupled with the development of ultra-fine technology in recent years, nanoscale inorganic antibacterial agents can be mass-produced and blended or composite into chemical fibers, ensuring the industrialization of antibacterial chemical fibers.
Researchers have made a breakthrough in the development of carbon nanotube (CNT) reinforced aluminum composites by utilizing ultra-short CNTs with unique intra-crystalline dispersibility. The nanoscale carbon nanotubes are uniformly distributed within the ultra-fine aluminum grains. When compared with typical CNT/Al composites with inter-granular CNT dispersion, this intra-crystalline carbon nanotube/aluminum composite has a stronger ability to anchor and maintain dislocations, resulting in enhanced strength and ductility. This innovative intra-crystalline dispersal strategy provides a new avenue for developing strong and tough nanocarbon reinforced metal-based composite materials. The research has been published recently in a prestigious academic journal.
Powder dispersion is an essential process in many industries, including pharmaceuticals, food, and cosmetics. The dispersion quality of powders in liquid systems can affect their stability, performance, and functionality. Therefore, it is vital to characterize the dispersion effect of powder to ensure the quality of the final product. In this article, we will discuss different methods to characterize powder dispersion and their significance in assessing the quality of the dispersion.
In recent years, there has been a trend of oil-based lubricants being replaced by water-based lubricants. Boron nitride coatings are often used in forging nickel based alloys, high melting point alloys, and titanium machined parts, which not only provide lubrication but also prevent workpiece oxidation.
