{"id":4329,"date":"2025-06-05T13:34:00","date_gmt":"2025-06-05T05:34:00","guid":{"rendered":"https:\/\/www.opticalcutting.com\/?p=4329"},"modified":"2025-10-23T14:06:43","modified_gmt":"2025-10-23T06:06:43","slug":"zns-cutting","status":"publish","type":"post","link":"https:\/\/www.opticalcutting.com\/vi\/zns-cutting\/","title":{"rendered":"High-Precision Cutting of ZnS (Zinc Sulfide) Using Endless Diamond Wire Saw"},"content":{"rendered":"

Zinc sulfide (ZnS) is a key optical crystal widely used in infrared imaging systems, military optics, and precision manufacturing. While ZnS offers excellent infrared transmission and mechanical strength, it is also extremely brittle and prone to edge chipping during processing. Traditional cutting tools struggle to achieve clean, crack-free surfaces on ZnS, making advanced cutting technology essential.<\/p>\n\n\n\n

This article introduces how endless diamond wire saws provide an ideal solution for cutting ZnS materials with superior surface quality and minimal material loss.<\/p>\n\n\n\n

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Loop-type diamond wire saw for graphite,optical glass and so on.<\/figcaption><\/figure>\n\n\n\n

ZnS crystals are known for:<\/h2>\n\n\n\n
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  • High infrared transmittance (8\u201312 \u03bcm range)<\/strong><\/li>\n\n\n\n
  • Extreme brittleness and low fracture toughness<\/strong><\/li>\n\n\n\n
  • Poor thermal conductivity (leading to thermal stress issues)<\/strong><\/li>\n\n\n\n
  • High hardness compared to traditional optics<\/strong><\/li>\n<\/ul>\n\n\n\n

    These characteristics make it a challenging material to process, especially for thin wafers or precision lenses. Any mechanical or thermal stress can lead to microcracks or chipping.<\/p>\n\n\n\n

    Why Endless Diamond Wire Saw Is Ideal for ZnS<\/strong><\/h2>\n\n\n\n

    Endless diamond wire saws use a closed-loop wire coated with diamond abrasive. This method offers several advantages over blades, lasers, or ID saws:<\/p>\n\n\n\n

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    • Ultra-thin kerf (typically around 0.35 mm)<\/strong> to reduce material waste<\/li>\n\n\n\n
    • Minimal mechanical stress<\/strong> thanks to smooth wire motion<\/li>\n\n\n\n
    • No heat-affected zone<\/strong>, preserving optical integrity<\/li>\n\n\n\n
    • Superior surface finish<\/strong>, often requiring no post-polishing<\/li>\n\n\n\n
    • Compatible with thin slices<\/strong>, down to 0.1 mm thickness<\/li>\n<\/ul>\n\n\n\n

      Cutting Performance Case: ZnS Wafers for IR Applications<\/strong><\/h2>\n\n\n\n

      In recent infrared lens production lines, customers use Vimfun endless wire saws to slice ZnS into 0.3\u20131.0 mm wafers:<\/p>\n\n\n\n

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      • Surface roughness<\/strong>: < 3.0 \u03bcm (no cracks or edge damage)<\/li>\n\n\n\n
      • Yield rate<\/strong>: Improved by over 25% compared to blade cutting<\/li>\n\n\n\n
      • Cycle time<\/strong>: Faster with programmable multi-slice function<\/li>\n<\/ul>\n\n\n\n

        Optional fixture customization allows accurate holding of round or square ZnS substrates, preventing micro-movements during slicing.<\/p>\n\n\n\n

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