What is diamond polishing slurry?

What is diamond polishing slurry?
Diamond polishing slurry (also known as Diamond Polishing fluid or Diamond Abrasive Slurry) can be classified into monocrystalline diamond polishing slurry, polycrystalline diamond polishing slurry, and nanodiamond polishing slurry. Based on the dispersion medium, diamond polishing slurry can be divided into water-based, oil-based, and general-purpose types.

 

Diamond polishing fluid is a high-performance processing material used for precision grinding and polishing. Its main components are micron or nano-sized diamond particles dispersed in a liquid medium.

 

 

I. Core Components

Diamond Abrasive

• Type: Mostly single-crystal or polycrystalline diamond particles, with extremely high hardness (Mohs hardness 10).
• Particle Size Range: From tens of micrometers (coarse polishing) to tens of nanometers (ultra-precision polishing), selectable according to requirements.

 

Dispersion Medium

• Water-based or oil-based liquids (such as deionized water, glycerin, alcohols), used to uniformly disperse diamond particles.

 

Additives

• Dispersing agents: Prevent particle agglomeration and ensure stability.
• pH adjusters, preservatives, etc., adapted to different processing materials.

 

II. Main Features

Ultra-High Hardness

• Capable of processing hard and brittle materials (such as sapphire, silicon carbide, ceramics, optical glass, etc.).

 

High Cutting Efficiency

• Sharp edges provide high material removal rates while reducing subsurface damage.

 

Excellent Surface Quality

• Nanometer-scale polishing fluid can achieve atomic-level roughness (Ra < 1nm), suitable for ultra-precision machining.

 

Strong Stability

• Uniform dispersion system prevents sedimentation or agglomeration, ensuring processing consistency.

III. Application Fields

Semiconductors and Optoelectronics

• Polishing of silicon wafers, silicon carbide substrates, and sapphire window wafers.

 

Precision Optics

• Ultra-smooth surface processing of lenses, prisms, and laser crystals.

 

Advanced Ceramics

• Grinding of structural ceramics such as zirconia and aluminum nitride.

 

Metal Processing

• Polishing of cemented carbide and tungsten steel molds.

 

Scientific Research and Testing

• Preparation of metallographic samples, electron microscope samples, etc.

 

IV. Precautions for Use

Dispersion Stability

• Shake well or use ultrasonic dispersion before use to prevent particle sedimentation from affecting the results.

 

Equipment Compatibility

• Requires matching polishing machines and polishing pads (such as non-woven fabric, polyurethane pads).

 

Process Parameter Optimization

• Pressure, rotation speed, and flow rate need to be adjusted according to material characteristics to avoid scratching or insufficient efficiency.

 

Waste Liquid Treatment

• Waste liquid containing diamond particles needs to be filtered or professionally recycled to prevent environmental pollution.

 

V. Comparison with similar products

 

VI. Common Market Product Specifications

Particle size grading:

• W0.5 (~0.5μm), W1, W3, W5, etc. (according to Japanese JIS standard).

 

Concentration:

• Typically 1% to 10% by weight; higher concentrations are used for rough polishing, and lower concentrations for fine polishing.

 

Packaging:

• 50ml to 5-liter bottles, with some options for customized formulations.

 

VII. Development Trends

Nanotechnology and Monodisperse Technology

• More uniform nanoparticles improve surface consistency.

 

Composite Polishing Fluids

• Adding chemical additives (such as oxidizers) to achieve "mechanical + chemical" synergistic polishing.

 

Green and Environmentally Friendly

• Biodegradable media and recycling technologies.