CERAMICS 1 - General information
Ceramics: A substance revolutionises the lubricant domain
It is a known fact that the automobile industry has been working flat out on the development of ceramic engines. These ceramics are already being used successfully in racing. Space industry also carries out research in that area and has found in the framework of their development program that ceramic products guarantee optimum lubrication even under extreme conditions.
The result of this is that ceramic materials are used more and more frequently for preventive measures for internal engine protection and replace substances like PTFE that have been used before.
When comparing ceramic materials to PTFE (e.g. teflon), the advantages of ceramic materials become clear:
PTFE Ceramic material
Frictional coefficient 0.04 - 0.5 0.02 - 0.15
Heat-trensfer coefficient 0.24 W/mk 40-70 W/mk
Max. action temperature 260°C 900°C
Decomposition temperature 260°C - 330°C -----
Transition temperature ------ 1000°C
Particle size Identical Identical
Polarity Non-polar Polar
Adhesion to metal No Very good
Lubricating properties up to 260°C 1,100°C
Decomposition products Harmful (FCKW ) Not harmful
The above-mentioned values are very plain. The frictional resistance of ceramic materials is 50% less than the one of PTFE. Another very good advantage is the good adhesion on metal. The excellent thermal transfer properties and the very high maximum action temperature guarantee an action of the product - even in the event of an extreme load on the engine. Ceramics are not toxic and are biodegradable in addition. They contain neither heavy metals ( MOS² ) nor do toxic gases develop during the combustion process (like for example with PTFE). For this reason, ceramics are environmentally neutral to a large extent.