YM NANO SILICA

1. Electronics & Semiconductor Industry

This field demands high purity to prevent metal ion contamination.

· Chemical Mechanical Polishing (CMP)

  · Common Type: Alkaline (pH 9-11), Ammonium-stabilized.

  · Solid Content: 30% - 50% (High concentration improves polishing efficiency).

  · Particle Size: 10-150 nm.

  · Function & Principle: Acts as a polishing abrasive. Through the synergistic effect of mechanical friction and chemical corrosion in an alkaline environment, it achieves atom-level planarization.

· Lead-Acid Battery Gelled Electrolyte

  · Common Type: Acidic or Weakly Alkaline.

  · Solid Content: 15% - 30% (Requires dilution before use).

  · Particle Size: 10-15 nm.

  · Function & Principle: Forms a thixotropic gel structure to immobilize the electrolyte, preventing acid stratification and leakage.

2. Coatings & Construction Industry

This field focuses on binding strength and film hardness. Sodium-stabilized types are common due to cost-effectiveness.

· Inorganic Mineral Coatings

  · Common Type: Alkaline (pH 9-11), Sodium or Potassium-stabilized.

  · Solid Content: 25% - 30%.

  · Particle Size: 8-20 nm.

  · Function & Principle: As water evaporates, SiO₂ particles react with Ca(OH)₂ in the substrate to form a strong chemical bond (calcium silicate), hardening the inorganic coating.

· Water-based Wood/Industrial Paints

  · Common Type: Acidic or Neutral (for compatibility with acid resins), Unstabilized.

  · Solid Content: 20% - 30%.

  · Particle Size: 10-30 nm.

  · Function & Principle: Fills resin pores, utilizing the high hardness of SiO₂ to enhance scratch resistance and film density.

3. Precision Investment Casting

This is a classic application for ammonium stabilization, leveraging its volatility at high temperatures to avoid casting defects.

· Binder for Shell Building

  · Common Type: Alkaline, Ammonium-stabilized (Core requirement).

  · Solid Content: 30% - 31% (Standard concentration for casting).

  · Particle Size: 10-20 nm.

  · Function & Principle: Binds refractory materials (like zircon flour) to form a solid shell. During high-temperature dewaxing, the ammonium volatilizes without residue, preventing shell cracking.

4. Catalysts & Chemical Carriers

Requires high specific surface area and prevents catalyst poisoning.

· Catalyst Binder/Support

  · Common Type: Alkaline (pH 9-10), Ammonium-stabilized (to avoid Na⁺ poisoning).

  · Solid Content: 20% - 40%.

  · Particle Size: 10-20 nm.

  · Function & Principle: Acts as a binder to agglomerate active components, or is spray-dried into microspheres to provide a high specific surface area for loading active ingredients.

5. Precision Polishing (Non-Semiconductor)

For optical glass, metals, etc. Purity requirements are slightly lower than in semiconductors.

· Optical Glass/Metal Polishing Slurry

  · Common Type: Alkaline, Sodium or Ammonium-stabilized.

  · Solid Content: 20% - 40%.

  · Particle Size: Rough polish: 30-70 nm, Fine polish: 10-30 nm.

  · Function & Principle: Acts as an auxiliary abrasive for micro-cutting, while the lubricating properties of the colloid buffer mechanical impact, forming an adsorption layer on the surface to reduce roughness.

6. Textile & Paper Industry

Used for surface treatment to increase friction or improve hand feel.

· Anti-Slip Yarn/Finishing Agent

  · Common Type: Alkaline, Sodium-stabilized (Cost-sensitive).

  · Solid Content: 20% - 30%.

  · Particle Size: 10-20 nm.

  · Function & Principle: Utilizes the high surface energy of nanoparticles to create a rough structure on fiber surfaces, increasing friction and achieving an anti-slip finish.

7. Refractories & Ceramic Fibers

The core requirements are high-temperature bonding strength and no impurities.

· High-Temperature Binder/Rigid Sealant

  · Common Type: Alkaline, Ammonium-stabilized (Core requirement).

  · Solid Content: 25% - 30%.

  · Particle Size: 10-20 nm.

  · Function & Principle: Binds ceramic fibers or particles. At high temperatures, the ammonium volatilizes, and the SiO₂ particles melt or sinter, forming a ceramic bond that gives the material its high-temperature strength.

8. Agriculture and Silicon Fertilizer Industry

Silicon is recognized as a beneficial element for plant growth. Silica sol, due to its nanoscale size, high dispersibility, and high reactivity, has been developed as a novel foliar silicon fertilizer, primarily used for heavy metal pollution remediation and enhancing crop resistance.

• Heavy Metal Pollution Remediation/Passivation Agent (Follicular Barrier)

• Common Types: Alkaline or neutral (pH 7-10), high purity, low sodium/ammonium stabilizer (requires removal of heavy metal impurities).

• Silicon Content: 10% - 30% (appropriate dilution is required for foliar spraying, commonly 20%-25%).

• Particle Size: 10-40 nm (nanoscale small particle size to facilitate passage through leaf stomata).

• Function and Principle:

• Physical Barrier: After spraying, a silicified layer (similar to a "coating") forms on the leaf surface, enhancing leaf mechanical strength and disease resistance.

• Physiological Blocking: After being absorbed by crops, it can precipitate or complex toxic heavy metal ions (such as Cd, Pb, Cr, As, etc.) within the plant, inhibiting their translocation and accumulation from the roots to the above-ground parts (seeds/fruits), thereby reducing the heavy metal content in agricultural products.

• Nitrate Resistance: When combined with molybdenum, it can significantly inhibit the absorption and accumulation of nitrates in vegetables.

• Functional Compound Silicon Fertilizer (Nutritional/Conditioning Type)

• Common Types: Acidic or alkaline (depending on the compatibility of elements), may contain functional ions (such as molybdenum, rare earth elements).

• Silicon Content: 10% - 25% (compound fertilizer formula).

• Particle Size: 10-30 nm.

• Function and Principle:

• Synergistic Effect: Utilizing the dispersibility and adhesiveness of silica sol, it loads trace elements (such as molybdenum, zinc) or rare earth elements, resulting in good adhesion after spraying and resistance to rain washout.

• Supplementing Silicon Nutrients: Providing highly active silicon nutrition for silicon-loving crops such as rice (rice is a typical silicon-loving crop, as silicon can improve its resistance to lodging and pests).

• Slow-Release Carrier: Utilizing its gel properties, it forms a slow-release layer on the leaf surface, prolonging the fertilizer's effect.