{"id":2546,"date":"2025-12-08T20:55:24","date_gmt":"2025-12-09T03:55:24","guid":{"rendered":"https:\/\/wfabrasive.com\/?p=2546"},"modified":"2025-12-09T19:05:22","modified_gmt":"2025-12-10T02:05:22","slug":"white-corundum-vs-brown-corundum","status":"publish","type":"post","link":"https:\/\/wfabrasive.com\/ja\/white-corundum-vs-brown-corundum\/","title":{"rendered":"\u30db\u30ef\u30a4\u30c8\u30b3\u30fc\u30e9\u30f3\u30c0\u30e0 vs \u30d6\u30e9\u30a6\u30f3\u30b3\u30fc\u30e9\u30f3\u30c0\u30e0\uff1a\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f"},"content":{"rendered":"\n

1. Introduction<\/strong><\/h2>\n\n\n\n

In the industrial abrasives industry, White Corundum (White Fused Alumina)<\/strong> and Brown Corundum (Brown Fused Alumina)<\/strong> are two of the most widely used materials. They are commonly applied in grinding, polishing, sandblasting, cutting, surface treatment, and refractory materials<\/strong>.<\/p>\n\n\n\n

Although both are aluminum oxide abrasives, they differ significantly in purity, hardness, toughness, application scenarios, and cost<\/strong>.<\/p>\n\n\n\n

This article provides a comprehensive comparison to help you determine which corundum to choose for your application<\/strong>.
<\/p>\n\n\n\n

\"White<\/a><\/figure>\n\n\n\n
\n\n\n\n

2. What Is White Corundum?<\/strong><\/h2>\n\n\n\n

2.1 Definition & Composition<\/strong><\/h3>\n\n\n\n

White Corundum<\/strong> is produced by melting and fusing high-purity aluminum oxide (Al\u2082O\u2083 \u2265 99%)<\/strong> in an electric arc furnace, then cooling and crushing. It contains almost no iron or other impurities, making it ideal for precision applications.
<\/p>\n\n\n\n

\"White<\/a><\/figure>\n\n\n\n

2.2 Key Properties<\/strong><\/h3>\n\n\n\n
    \n
  • Extremely high hardness (Mohs 9)<\/strong><\/li>\n\n\n\n
  • Self-sharpening<\/strong>: forms new cutting edges during grinding<\/li>\n\n\n\n
  • Low impurities and iron content<\/strong>: avoids material contamination<\/li>\n\n\n\n
  • High chemical stability<\/strong><\/li>\n\n\n\n
  • Uniform particle size and white appearance<\/strong><\/li>\n<\/ul>\n\n\n\n

    2.3 Common Applications<\/strong><\/h3>\n\n\n\n
      \n
    • Precision grinding<\/strong> (precision parts, ceramics, bearings)<\/li>\n\n\n\n
    • Polishing<\/strong> (glass, gemstones, electronic components)<\/li>\n\n\n\n
    • Stainless steel and aluminum surface treatment<\/strong><\/li>\n\n\n\n
    • Surface preparation for sandblasting<\/strong><\/li>\n\n\n\n
    • High-performance refractory materials<\/strong>
      <\/li>\n<\/ul>\n\n\n\n
      \"White<\/figure>\n\n\n\n
      \n\n\n\n

      3. What Is Brown Corundum?<\/strong><\/h2>\n\n\n\n

      3.1 Definition & Composition<\/strong><\/h3>\n\n\n\n

      Brown Corundum<\/strong> is produced by fusing bauxite, iron oxide, and carbon<\/strong>, with Al\u2082O\u2083 content typically around 95\u201397%. Impurities such as Fe\u2082O\u2083 and TiO\u2082 give it a brown to dark brown color.<\/p>\n\n\n\n

      3.2 Key Properties<\/strong><\/h3>\n\n\n\n
        \n
      • High toughness and impact resistance<\/strong><\/li>\n\n\n\n
      • Higher bulk density<\/strong><\/li>\n\n\n\n
      • Durable and resistant to breakage during grinding<\/strong><\/li>\n\n\n\n
      • Lower cost compared to White Corundum<\/strong><\/li>\n\n\n\n
      • Suitable for large-scale industrial sandblasting and rough grinding<\/strong>
        <\/li>\n<\/ul>\n\n\n\n
        \"Brown<\/figure>\n\n\n\n

        3.3 Common Applications<\/strong><\/h3>\n\n\n\n
          \n
        • Industrial sandblasting<\/strong> (rust, old paint removal)<\/li>\n\n\n\n
        • Heavy-duty grinding<\/strong> (steel processing, foundry)<\/li>\n\n\n\n
        • Anti-slip flooring<\/strong><\/li>\n\n\n\n
        • Refractory materials<\/strong> (castables, refractory bricks)<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n

          4. White Corundum vs Brown Corundum: Key Differences<\/strong><\/h2>\n\n\n\n
          Property<\/th>White Corundum<\/strong><\/th>Brown Corundum<\/strong><\/th><\/tr><\/thead>
          Al\u2082O\u2083 Content<\/td>\u2265 99%<\/td>95\u201397%<\/td><\/tr>
          Iron Content<\/td>Very Low<\/td>Higher<\/td><\/tr>
          Hardness<\/td>High<\/td>Medium-High<\/td><\/tr>
          Toughness<\/td>Low<\/td>High<\/td><\/tr>
          Price<\/td>Higher<\/td>Lower<\/td><\/tr>
          Main Uses<\/td>Precision Grinding, Polishing<\/strong><\/td>Sandblasting, Rough Grinding, Refractory<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

          4.1 Color Difference<\/strong><\/h3>\n\n\n\n
            \n
          • White Corundum<\/strong>: white<\/li>\n\n\n\n
          • Brown Corundum<\/strong>: dark brown to black-brown
            Color differences are caused by different impurities.<\/li>\n<\/ul>\n\n\n\n

            4.2 Grinding Performance<\/strong><\/h3>\n\n\n\n
              \n
            • White Corundum<\/strong>: sharp and self-sharpening, cleaner for precision work<\/li>\n\n\n\n
            • Brown Corundum<\/strong>: stronger impact, suitable for rough grinding and heavy-duty operations<\/li>\n<\/ul>\n\n\n\n

              4.3 Reusability<\/strong><\/h3>\n\n\n\n