{"id":10488,"date":"2025-07-29T10:24:33","date_gmt":"2025-07-29T02:24:33","guid":{"rendered":"https:\/\/5starmaterials.com\/?p=10488"},"modified":"2025-07-29T11:44:51","modified_gmt":"2025-07-29T03:44:51","slug":"aluminum-paste-particle-size","status":"publish","type":"post","link":"https:\/\/5starmaterials.com\/pt\/aluminum-paste-particle-size\/","title":{"rendered":"Como o tamanho das part\u00edculas de pasta de alum\u00ednio molda cada brilho, escudo e c\u00e9lula solar"},"content":{"rendered":"
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Have you ever opened a can of metallic paint and wondered why one batch looks like liquid chrome while another feels like scattered glitter? The secret is hidden in a simple curve called the <\/span>Aluminum paste particle size<\/span><\/strong><\/a> distribution. At <\/span>Five<\/span> Star New Materials, we like to think of this curve as the \u201cpersonality chart\u201d of every aluminum paste we make. A narrow peak on the left (tiny flakes, 1\u201310 \u00b5m) behaves like a tidy introvert\u2014quiet, uniform, and great at hiding whatever is underneath. A broad hill on the right (larger flakes, 30\u201380 \u00b5m) acts like an exuberant extrovert\u2014loud, flashy, and perfect when you want a bold sparkle that flips from silver to charcoal as you walk by.<\/span><\/p>

\"non<\/p>

Why does this matter to you? Because once you understand the language of particle size, you can pick the exact \u201cpersonality\u201d your coating, ink, concrete, or solar cell needs without costly trial-and-error. In the next few minutes, we\u2019ll walk you through real-life examples: how a 5 \u00b5m <\/span>Aluminum paste particle size<\/span><\/strong> turns an auto-repair spray into mirror-like chrome, why 60 \u00b5m flakes make lightweight concrete float yet stay strong, and why our lab always checks D10, D50, and D90 before any batch leaves the Five Star plant. No jargon, no heavy math\u2014just clear pictures and straight talk from the engineers who make the paste. Grab a coffee, scroll down, and let\u2019s decode that curve together.<\/span><\/p>

At Five Star New Materials, we recognize that <\/span>the particle size<\/span><\/strong> of aluminum paste is a key factor that determines its performance across various applications. It influences everything from the shimmer in your paint to the efficiency of your solar cells. Let’s explore how.<\/span><\/p>

\"leafing<\/p>

How Aluminum Paste Particle Size Distribution Influences Coating Performance<\/span><\/strong><\/h2>

O <\/span>particle size distribution<\/span><\/strong> of aluminum paste significantly impacts coating performance in several ways:<\/span><\/p>

  1. Hiding Power and Tinting Strength<\/span><\/strong>: Smaller particle sizes mean more aluminum flakes per unit volume, resulting in stronger hiding power and tinting strength. <\/span>Esse<\/span> creates a denser coating and a whiter color. Larger particle sizes reduce hiding power but enhance the “flop effect,” making the metallic sparkle more pronounced.<\/span><\/li>
  2. Surface Gloss and Roughness<\/span><\/strong> Fine-grain aluminum paste (e.g., 5\u03bcm) produces a delicate, high-gloss coating, ideal for electroplated silver effects. Coarse-grain aluminum paste (e.g., 35\u03bcm) results in a strong granular feel and increased roughness, perfect for textured or sand-silver metallic coatings.<\/span><\/li>
  3. Flash and Metallic Feel<\/span><\/strong> A wide particle size distribution (a mix of fine and coarse particles) enhances the flash effect but may reduce uniformity. A narrow particle size distribution (e.g., a small D90-D10 range) provides a more uniform metallic feel and better visual consistency.<\/span><\/li>
  4. Excessively fine aluminum powder (e.g., < 10 \u03bcm) exhibits poor electrical properties, resulting in low transfer efficiency and nozzle clogging in electrostatic spraying. Overly coarse aluminum powder (e.g., > 90 \u03bcm) requires longer melting times, which can potentially cause orange peel or poor leveling. We recommend an optimal particle size range of 20\u201380 \u03bcm for electrostatic spraying and a D50 of 20\u201325 \u03bcm for water-based systems.<\/span><\/li>
  5. Functional Performance (e.g., Heat Insulation, Corrosion Protection)<\/span><\/strong> For solar heat reflective coatings, coarse aluminum powder between 50\u201370 \u03bcm offers the highest reflectivity; however, we must balance this with application performance<\/a>. In anti-corrosion coatings, fine aluminum powder (<15\u03bcm) forms a dense barrier, enhancing protective properties.<\/span><\/li><\/ol>

    Summary and Recommendations<\/span><\/strong><\/h3>
    Application Requirement<\/td>Recommended Particle Size Range<\/td>Distribution Requirement<\/td><\/tr><\/thead>
    High Coverage, Electroplating Silver Imitation<\/b><\/td>5\u201310 \u00b5m<\/td>Narrow distribution (D90-D10 small)<\/td><\/tr>
    Metallic Flash Effect<\/b><\/td>15\u201325 \u00b5m<\/td>Medium distribution<\/td><\/tr>
    Sand Silver Texture<\/b><\/td>30\u201350 \u00b5m<\/td>Moderately wide distribution<\/td><\/tr>
    Electrostatic Spray Powder Coating<\/b><\/td>20\u201380 \u00b5m<\/td><10\u00b5m particles <10%<\/td><\/tr><\/tbody><\/table>

    To optimize your process, we recommend a comprehensive evaluation of the particle size distribution using D10, D50, and D90 values, which can be<\/span> precisely measured with a laser particle size analyzer.<\/span><\/p>

    \"Aluminum<\/p>

    Aluminum Paste Particle Size: A Core Parameter<\/span><\/strong><\/h2>

    The particle size<\/span><\/strong> (diameter) of aluminum paste is a key parameter that determines its application performance. Different particle size ranges of aluminum paste exhibit significant differences across various applications, including coatings, inks, building materials, and electronics. Here’s a systematic summary based on current data:<\/span><\/p>

    Aluminum Paste Particle Size Range and Classification<\/span><\/strong><\/h3>
    Tipo<\/b><\/td>Faixa de tamanho das part\u00edculas (D50)<\/b><\/td>Morphological Characteristics<\/b><\/td>Aplica\u00e7\u00f5es t\u00edpicas<\/b><\/td><\/tr><\/thead>
    Ultra-fine Aluminum Paste<\/b><\/td>1\u201310 \u00b5m<\/td>Thin flakes, 0.1\u20130.5 \u00b5m thick<\/td>High-coverage electroplating imitation, automotive refinish paints, fine inks<\/td><\/tr>
    Medium-Grain Aluminum Paste<\/b><\/td>10\u201325 \u00b5m<\/td>Silver dollar or cornflake-like<\/td>Metallic flake paints, plastic paints, coil coatings<\/td><\/tr>
    Coarse-Grain Aluminum Paste<\/b><\/td>25\u201350 \u00b5m<\/td>Large flakes, irregular edges<\/td>Sand silver effect, architectural exterior walls, roof reflective coatings<\/td><\/tr>
    Extra-Coarse Aluminum Paste<\/b><\/td>50\u2013100 \u00b5m<\/td>High aspect ratio flakes<\/td>Heat-insulating coatings, heavy-duty anti-corrosion primers<\/td><\/tr><\/tbody><\/table>

    Impact of Particle Size on Coating Performance<\/span><\/strong><\/h3>
    Performance Dimension<\/td>Fine Particle Size (e.g., 5\u201310 \u00b5m)<\/td>Coarse Particle Size (e.g., 30\u201350 \u00b5m)<\/td><\/tr><\/thead>
    Hiding Power<\/b><\/td>High (more flakes per unit volume)<\/td>Low (requires higher additive amount)<\/td><\/tr>
    Brilho met\u00e1lico<\/b><\/td>Fine and soft, similar to electroplating effect<\/td>Strong sparkle, significant color shift with angle<\/td><\/tr>
    Rugosidade da superf\u00edcie<\/b><\/td>Low (suitable for high-gloss topcoats)<\/td>High (suitable for textured or matte systems)<\/td><\/tr>
    Applicability<\/b><\/td>May clog spray guns (electrostatic spraying requires <10% ultra-fine powder)<\/td>Poor leveling, requires adjustment of spraying parameters<\/td><\/tr>
    Functional Add-ons<\/b><\/td>Suitable for high reflectivity (e.g., LED heat dissipation inks)<\/td>Suitable for heat insulation (e.g., roof reflective coatings)<\/td><\/tr><\/tbody><\/table>

    Typical Product Examples (Industrial Grade)<\/span><\/strong><\/h3>

    We offer specialized aluminum pastes like the Bisley series:<\/span><\/p>