Examples of some polymer characteristics

The increase in the polymer thermal conductivity is far from the predicted values resulting from a mixing law and actual data are low, for example  

However, magnetic additives such as ferrites or rare earths can be added to plastics to produce polymer magnets. 

The two main families of magnetic additives used for polymer magnets are ferrites and rare earths, which have very different characteristics. 

Anisotropic powders of ferrites have excellent cost/performance ratio, limited service temperatures, and low electrical resistance. 

Rare earths have higher magnetic performances, service temperatures, electrical resistance and costs. 

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