Adhesives
Convential adhesive bonding can be used to produce joints between ceramics and themselves or metals. For relatively low temperatures, (<300°C), organic adhesives will suffice; however, for high temperature capabilities (>1000°C ), inorganic adhesives are required.
The bonds are produced by careful preparation of the substrate surfaces and then the adhesive layer is applied. The whole assembly is then cured, which can require temperatures from 260-1000°C.
The inorganic adhesives are generally composed of constituents such as: alumina, zirconia, silica, magnesia, phosphates and silicates. The ingredients are mixed in order that a range of thermal expansions or operating temperatures may be achieved. Consideration must be taken into account regarding joint design.
It is frequently found that the bondline is fractious; with modest strength. But a bond is retained to high tempreatures (upto 12-1400°C).
Further information
- Best practice guides
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Joining ceramics - a guide to best practice
- Knowledge summaries
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Ceramic Adhesives
- FAQs
- What are ceramic adhesives?
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What are inorganic ceramic adhesives?
- Staff papers
- Techniques for bonding ceramics (Bulletin, September/October 1990) Industrial Members Only
For more information please contact: ceramics@twi.co.uk