金属粉末

Nonferrous metals such as aluminum, copper, and titanium are functional, lightweight materials with excellent thermal conductivity and heat resistance, and are used in a variety of applications. Oxygen, hydrogen, and sulfur are intentionally added to these materials to improve their functions. In addition, the concentration of oxygen, hydrogen and carbon as foreign substances is controlled to improve quality.

Metal 3D printing is already used for creating prototypes in a wide range of fields, and it is now being studied for use in mass production. Stainless steel, Ti, Al, and Cu are commonly used as metal 3D printing materials, and customers have expressed a desire to be able to quickly manage the amounts of oxygen (O) and nitrogen (N) in those materials.

金属纳米颗粒（亦称胶体金属）的研究历史可追溯至一个半世纪前*，其最早的科学文献记载已逾 150 年。此类材料涵盖纯金属与金属氧化物胶体两大类，在催化反应、铁磁流体、生物标记及众多新兴领域均展现出广泛的应用价值。

金纳米棒是一种棒状的金纳米颗粒，可应用于显色材料、传感材料、生物标志物、DDS 研究材料、光热转换材料、光敏剂等领域。本文使用 HORIBA Partica CENTRIFUGE CN-300 离心式粒度分析仪对金纳米棒的粒径分布进行分析。

In this note, we will briefly explore the history of powder metallurgy and then examine the importance of powder quality to the production of nanomaterials. Using a case study from the Vecchio lab at the University of California, San Diego, we will highlight the necessity of accurate particle sizing in the production of nanoparticles by spark erosion.

Nanoparticle gold (also known as colloidal gold) is a suspension of sub-micron gold particles typically dispersed in water. Gold nanoparticles are of great interest for researchers in many fields due to their unique physical and optical properties. These properties change with the particle size distribution, so size analysis is an important measurement requirement.

Virtually any metal can be made into a powder through processes including atomization, electrolysis, chemical reduction, and size comminution. The metal powder can then be used to fabricate parts from simple to complex shape. The technique and study of these processes is known as powder metallurgy, a field of study well acquainted with particle characterization. The size distribution and shape of the powder metal particles influences the physical properties of the parts created.

A silver colloid is a suspension with a dispersed phase consisting of silver particles between 1 nm – 1 um evenly dispersed in a continuous phase. The sample can be considered to be on the nanoparticle scale if the size of the dispersed phase particles is between 1-100 nm.

A copper colloid is a suspension with a dispersed phase consisting of copper particles between 1 nm – 1 um evenly dispersed in a continuous phase. The sample can be considered to be on the nanoparticle scale if the size of the dispersed phase particles is between 1-100 nm.

A platinum colloid is a suspension with a dispersed phase consisting of platinum particles between 1 nm – 1 um evenly dispersed in a continuous phase, in this case water. The sample can be considered to be on the nanoparticle scale if the size of the dispersed phase particles is between 1-100 nm.

A palladium colloid is a suspension with a dispersed phase consisting of palladium particles between 1 nm – 1 um evenly dispersed in a continuous phase, in this case DMF. The sample can be considered to be on the nanoparticle scale if the size of the dispersed phase particles is between 1-100 nm.