さまざまな産業に適した石英砂の選び方とは？
Quartz sand is an important basic non-metallic mineral resource, widely used in fields such as glass manufacturing, mechanical casting, electronics, metallurgy, refractory materials, chemicals, and ceramics. Customers often ask which products their quartz ore is suitable for and which industries it can be applied to. Based on the silica (SiO2) content, a preliminary judgment can be made. Quartz sand can be divided into three categories based on SiO2 content: Quartz sand with SiO2 content below 99.9% This type of quartz sand is mainly used in large-volume industries, including: These industries require lower purity and focus on physical characteristics like particle size, hardness, and color. The market supply is abundant, though […]
CVD法によるシリコン-カーボン負極材料の作製
Common methods for preparing silicon-carbon negative electrode materials include mechanical ball mill, spray drying, chemical vapor deposition (CVD), etc. Mechanical ball mill crushes bulk materials into fine particles by colliding with rotating balls. The process is simple and the cost is low, but the particle agglomeration phenomenon is serious. In addition, excessive grinding will destroy the crystallinity and surface of graphite, leading to side reactions. Spray drying is to use heated gas to quickly dry liquid solutions to make dry powders. It is simple, continuous and scalable, but this method has high energy consumption and high instrument requirements. CVD is a process in which gaseous or vaporous substances react in […]
超微粉末の特性評価：最も一般的に用いられる方法は？
Ultrafine powder (also known as ultrafine powder) usually refers to powder with a particle size below 1250 mesh (10μm). It is subdivided into micron powder, submicron powder and nano powder. When solid matter is crushed to micron or even nanometer scale, its physical and chemical properties will change significantly. This makes ultrafine powder a hot topic in scientific research and industrial applications. Ultrafine powder plays a key role in modern industries. It is widely applied in electronics, light industry, chemicals, military, traditional medicine, agriculture, and food. These powders drive industrial and technological progress. Accurate analysis of ultrafine powder characterization, such as particle size, shape, distribution, and surface properties is essential. […]
プラスチック改質におけるタルク粉末
In today’s plastics industry, modified plastics have attracted much attention for their excellent performance and wide application fields. Talcum powder, as an important and widely used inorganic mineral filler, plays a vital role in plastic modification. Talcum Powder can not only effectively improve the physical properties of plastic products, but also reduce their production costs to a certain extent. However, how to reasonably control costs while ensuring strength has become an important issue in plastic modification. Talc is used in plastic modification. How to balance the relationship between flexural modulus, impact strength, etc. and cost by adjusting the amount of talcum powder added and its characteristics? Effect of talc on […]
粉体加工技術がロボット性能の限界を押し広げる
In modern manufacturing, the importance of powder materials is becoming increasingly prominent. Especially in the field of robot manufacturing, powder materials account for more than 65% of the weight of the robot, such as metal powder, ceramic powder and composite powder. With the continuous advancement of technology, the precision of powder processing has also achieved a leap from millimeters to nanometers. It provides a solid foundation for high-end manufacturing. The Revolution of Powder Precision: from Millimeters to Nanometers In the past, the particle size control of powders was mainly at the millimeter or micron level. It was difficult to meet the manufacturing requirements of high-precision, lightweight, and high-strength robot components. […]
方解石から高品質の炭酸カルシウムを製造するために必要な指標は何ですか？
Calcite is a natural calcium carbonate mineral and the primary raw material for ground calcium carbonate (GCC). The grade and impurity content of calcite ore directly impact the quality of the final product. High-end calcium carbonate from calcite requires high-purity ore with low levels of heavy metals and other impurities. These factors determine whether the product can be used in food, pharmaceutical, and other premium applications, or only as general filler-grade calcium carbonate. To fully evaluate calcite ore quality, the following items are tested: CaO, whiteness, HCl insolubles, MgO, SiO₂, Al₂O₃, Fe₂O₃ (TiO₂), MnO, heavy metals (Pb, Hg, Cr⁶⁺, Cd), Ba, F, As, alkali metals, reducing sulfur. Also, dark impurities, […]
飼料への海藻粉末の応用
There are more than 10,000 species of marine algae, classified into 10 phyla. They can be divided into green, brown, blue, yellow, and golden algae based on pigment content. Based on morphology, they are classified into macroalgae and microalgae. Macroalgae include kelp, kombu, and giant kelp from brown algae. They also include Cladophora and Codium from green algae, and nori and Corallina from red algae. Microalgae are the smallest, single-celled algae, with diameters only a few micrometers, but are abundant. Algae can be processed into seaweed powder. The use of seaweed powder in feed provides essential trace minerals, amino acids, and vitamins that support optimal growth in animals. Currently, the […]
ジェットミル操業におけるエネルギー消費を最小限に抑えるには？
Jet mills are known for their ability to grind materials without producing contamination. After grinding, the high-speed compressed airflow slows down and increases in volume. This process absorbs heat and has a cooling effect on the material, making it ideal for ultrafine grinding. In jet mill operations, high-speed airflow accelerates particles to collide with each other or target surfaces to achieve the grinding effect. These mills are often preferred in applications where maintaining material purity is critical. This includes the production of pharmaceuticals, food additives, and high-performance coatings. Key Methods to Accelerate Particle Grinding with High-Speed Airflow In jet mill operations, there are three primary methods used to accelerate solid […]
超微粒子の凝集を防ぐための適切な分散剤の選び方とは？
Choosing the appropriate dispersant to prevent the ultrafine powder agglomeration requires a comprehensive consideration of powder properties, dispersing medium, and processing conditions. The following are key principles and strategies: Select the Dispersant Type According to The Powder Characteristics Surface Charge and Polarity Matching Polar powders (such as ceramics, oxides): Prefer anionic dispersants (e.g., sodium polyacrylate, sodium hexametaphosphate) to prevent the ultrafine powder agglomeration through electrostatic repulsion. For example, ZnO is stably dispersed at pH = 5 via double-layer repulsion.Non-polar powders (such as graphene, carbon black): Use non-ionic dispersants (e.g., PVP, PEG) to prevent contact through steric hindrance. For high surface energy materials (e.g., nano-silicon carbide), combine in-situ functionalization (e.g., silane […]