Additives and prepared bodies for electrical porcelain insulators

Perfect porcelain insulators and better yields

Our mineral additives are of very high and consistent quality, meaning you can maintain steady, high yields during the production of insulators.

We have a range of engineered mineral and prepared body solutions* dedicated to the needs of the electrical porcelain industry. Our solutions are developed to provide high yields during the production of insulators and ensure excellent in-service performance.

Imerys mineral solutions confer a number of unique properties to electrical porcelains:

Very high consistency
Very high levels of workability and mechanical strength
High alumina content
Low iron and carbon contents

* Prepared bodies are only available in Europe, the Middle East, Africa and Asia Pacific.

FAQ

Ball clay

Our ball clay is suitable for all voltage insulators, including the latest generation. They offer the following properties:

Consistency
High workability enabling the shaping of complex items
High unfired strength minimizing breakage during shaping, handling and drying
Low organic content minimizing the risks of bloating, black coring and void formation from burnout
Faster firing cycles, in both oxidation and reducing atmosphere that would not be achievable with other more carbonaceous products
Low residue limiting sieving wastes

Kaolin

Our kaolin is selected for its high alumina content and low pyro plastic deformation.
Main features:

Particularly suited for large piece insulators
Low rate of free quartz particles
A range of particle size distributions to allow optimized particle packing

Feldspar

Suitable for all insulators up to UHV, Imerys feldspars are:

High in K₂O, resulting in low pyro plastic deformation
Low in Na₂O, maximizing dielectric properties
Low Fe₂O₃ and TiO₂, improving fired color

Talk to our ceramics experts today about your processes and the attributes you want to boost in your insulators, and they’ll find the right solution for you.

Imerys offers tailor-made electrical porcelain bodies for different firing temperatures and atmospheres. Our prepared bodies help manufacturers meet the relevant sections of the industry IEC 60672 standards.

Engineered at one of our European ceramic preparation plants, our prepared bodies have a significant impact on our customers’ production throughput improvement: