Glass sintering is a process where glass materials are fused together into a solid mass without reaching the melting point of the glass.
This process is achieved through a thermal cycle involving heating the compacted glass parts at a temperature lower than the melting point.
The atoms in the glass materials diffuse across particle boundaries and fuse the particles together.
5 Key Points to Understand the Process
1. Types of Glass Materials
Glass sintering involves materials like ceramic glazes, silica glass, lead glass, and sintered glass slabs made from fused silica glass powder.
2. Thermal Cycle
The process involves heating the compacted glass parts at a temperature lower than the melting point.
This allows the atoms to diffuse across particle boundaries and fuse the particles together.
3. Compression Molding
The glass materials are compacted and then heated in a continuous furnace under controlled speed and atmosphere.
4. Sintering Temperature
The sintering temperature usually ranges between 750 and 1300°C, depending on the specific glass material and desired characteristics.
During sintering, the atoms in the glass materials diffuse across the boundaries of the particles, welding the particles together and creating a solid piece.
5. Solid-State Diffusion
This mechanism allows for the fusion of particles without melting the materials, making sintering an ideal shaping process for materials with high melting points.
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