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Rare earth polishing liquid

Rare earth polishing liquid

Rare earth polishing liquid generally contains abrasive grains, dispersants, pH regulators, oxidants and other ingredients. The selection and content of various additives have a great influence on the polishing effect. The polishing liquid has the characteristics of high technical content, strong confidentiality, and non-recyclability, making it a costly part of the polishing process. According to the difference of the main abrasive particles in the rare earth polishing liquid, the polishing liquid is generally divided into diamond polishing liquid and alumina polishing liquid, cerium oxide polishing liquid, silicon oxide polishing liquid and other types.

The abrasive of the diamond polishing liquid is mainly polycrystalline diamond powder, which can maintain a high cutting speed during polishing and is not easy to scratch the abrasive. At present, it is mainly used for polishing sapphire, LED chips, etc.

The alumina polishing liquid uses ultrafine alumina as the abrasive, and most of the particles used are micron and sub-micron. Usually used for polishing ceramics, hard disk substrates, optical fiber connectors, etc.

Cerium oxide polishing liquid is a high-performance polishing liquid using cerium oxide particles as abrasives. According to different preparation processes, cerium oxide particles of different strengths and sizes can be obtained, mainly in the micron and nano-scale. Widely used in a wide range of devices such as ordinary glass, optical glass, high-precision optical instruments, crystal surfaces, semiconductor components, etc.

The silicon oxide polishing liquid is a high-purity low-metal ion polishing product produced by a special process with high-purity silicon powder as the raw material. It is often used in the polishing of ghost films and high-precision optical instruments.