Rasotherm

Rasotherm laboratory glassware

Rasotherm glass pipes for irrigation of cultivated areas in agriculture, 1985

Rasotherm was the trade name of a borosilicate glass of water resistance class I (WBK I) from the GDR .

The glass was developed in 1950 by the VEB Jenaer Glaswerk Schott & Genossen and was widely used as technical glass.

It was used for pipelines, large containers and reaction vessels in the chemical industry, laboratory technology and in electrical engineering / electronics. These glasses have high chemical resistance and a low coefficient of expansion, ie high resistance to temperature changes. Therefore, thermally and chemically highly stressed devices and equipment can be manufactured from them.

Rasotherm brand glass pipelines were mainly used in the chemical and food industries. There the glass was often used for the transport of liquids and powdery substances. Later the glass pipelines were also used in the technical building equipment. Essentially for the transport of hot water up to 60 ° in multi-storey residential buildings.

properties

density	${\ displaystyle \ rho = 2 {,} 23 ~ \ mathrm {g / cm ^ {3}}}$
Modulus of elasticity	${\ displaystyle E = 62 \ cdot 10 ^ {3} ~ {\ rm {N / mm ^ {2}}}}$
Coefficient of thermal expansion	${\ displaystyle \ alpha = 3 {,} 3 \ cdot 10 ^ {- 6} ~ \ mathrm {K ^ {- 1}}}$
Thermal conductivity	${\ displaystyle k = 1 {,} 12 ~ {\ rm {W / (K \ cdot m)}}}$
Thermal shock resistance	${\ displaystyle T = 100 ~ {\ rm {^ {\} K}}}$

In addition to the Jena glassworks, Rasotherm products were also manufactured in the VEB factory for technical glass in Ilmenau .

literature

Horst Winter: The Ilmenau glass industry then and now . (A historical foray over three centuries from the first to the tenth Ilmenau glassworks), Ilmenau, 2007
Fritz Albrecht: Book of tables for pipe consumers . VEB German publishing house for basic industry, Leipzig, 1986

Individual evidence

↑ Mütze K .: The power of optics, Jenas industrial history 1846-1996 (Volume II 1946-1996), Quartus-Verlag, Bucha, 2009, p. 215
^ Richter H .: Glass - Material Science, VEB Deutscher Verlag für Grundstoffindindustrie, Leipzig, 1988, pp. 90–96
^ Petzold, Marusch, Schramm: The building material glass (basics, properties, products, glass building elements, applications), Verlag für Bauwesen, Berlin, 1990, p. 123

[1] Mütze K .: The power of optics, Jenas industrial history 1846-1996 (Volume II 1946-1996), Quartus-Verlag, Bucha, 2009, p. 215

[2] Richter H .: Glass - Material Science, VEB Deutscher Verlag für Grundstoffindindustrie, Leipzig, 1988, pp. 90–96

[3] Petzold, Marusch, Schramm: The building material glass (basics, properties, products, glass building elements, applications), Verlag für Bauwesen, Berlin, 1990, p. 123