Development of technical ceramics began in 1849 with porcelain, when the telegraph line between Frankfurt and Berlin was equipped with bell-shaped insulators. The largest application field is still in electrical engineering.

Porcelain has a long tradition at Rauschert, it was the first material that we processed more than 120 years ago. Today our porcelain is mainly used in the area of electrical technology. It has a high dielectric strength, even at high temperatures. In addition, porcelain is tracking-resistant as well as resistant to corrosion and ageing.

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Production & properties

Porcelain is a silicate-ceramic material based on natural raw material.
The chemical components are 30 – 75 % SiO2 and 20 – 65 % Al2O3.
The glass phase is 60 – 70 %. Crystalline components are embedded in this.

Porcelain is divided into different groups, depending on the moulding technique:

      • C 110, quartz-enriched porcelain: slip-cast and extruded
      • C 111, pressed porcelain: cost-effective production of complicated moulded parts in large quantities through dry and wet pressing



Technical porcelain is an excellent insulation material for electrical engineering (high and low voltage), is dielectric – even under the influence of humidity – tracking-resistant, non-combustible and absolutely heat resistant up to 1000 °C.

Thread guides for textile machines made of pore-free glazed hard porcelain guide modern carbon-, kevlar- and aramid fibres especially reliably.

Its chemical stability makes porcelain an indispensable material in chemical plant construction.

Products that are produced in large quanitities include lamp sockets.

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