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picture1_Manufacturing Ppt 82418 | Glassworking


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File: Manufacturing Ppt 82418 | Glassworking
glass overview of the material glass is one of three basic types of ceramics the others are traditional ceramics and new ceramics glass is distinguished by its noncrystalline vitreous structure ...

icon picture PPTX Filetype Power Point PPTX | Posted on 10 Sep 2022 | 3 years ago
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                  Glass: Overview of the Material
       Glass is one of three basic types of ceramics
           The others are traditional ceramics and new 
            ceramics 
       Glass is distinguished by its noncrystalline (vitreous) 
         structure
           The other ceramic materials have a crystalline 
            structure 
         ©2013 John Wiley & Sons, Inc.  M P Groover, Principles of Modern Manufacturing 5/e 
                  Glass Products
       Glass products are commercially produced in an almost 
         unlimited variety of shapes
       Most products made in very large quantities
           Light bulbs, beverage bottles, jars, light bulbs
           Window glass
           Glass tubing (e.g., for fluorescent lighting)
           Glass fibers
       Other products are made individually
           Giant telescope lenses 
         ©2013 John Wiley & Sons, Inc.  M P Groover, Principles of Modern Manufacturing 5/e 
                  Shaping Methods for Glass
       Methods are quite different from those for traditional 
         and new ceramics, which are based on particulate 
         processing
       Process sequence in shaping glass:
          Starting material is heated to transform it from a 
           hard solid into a viscous liquid
          It is then shaped while in this fluid condition 
          When cooled and hard, the material remains in 
           the glassy state rather than crystallizing 
         ©2013 John Wiley & Sons, Inc.  M P Groover, Principles of Modern Manufacturing 5/e 
                  Process Sequence in 
                  Glassworking
       Typical process sequence in glassworking: (1) 
         preparation of raw materials and melting, (2) shaping, 
         and (3) heat treatment
         ©2013 John Wiley & Sons, Inc.  M P Groover, Principles of Modern Manufacturing 5/e 
                  Raw Materials Preparation and 
                  Melting
       Principal component in nearly all glasses is silica, SiO
                                                                2
           Primary source is natural quartz in sand 
       Other components are added in proportions to achieve 
         the desired composition: 
           Soda ash (source of Na O), limestone (source of 
                                    2
            CaO), aluminum oxide (Al2O3), and potash (source 
            of K O), 
                2
           Recycled glass is usually added to the mixture too
         ©2013 John Wiley & Sons, Inc.  M P Groover, Principles of Modern Manufacturing 5/e 
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...Glass overview of the material is one three basic types ceramics others are traditional and new distinguished by its noncrystalline vitreous structure other ceramic materials have a crystalline john wiley sons inc m p groover principles modern manufacturing e products commercially produced in an almost unlimited variety shapes most made very large quantities light bulbs beverage bottles jars window tubing g for fluorescent lighting fibers individually giant telescope lenses shaping methods quite different from those which based on particulate processing process sequence starting heated to transform it hard solid into viscous liquid then shaped while this fluid condition when cooled remains glassy state rather than crystallizing glassworking typical preparation raw melting heat treatment principal component nearly all glasses silica sio primary source natural quartz sand components added proportions achieve desired composition soda ash na o limestone cao aluminum oxide alo potash k recy...

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