Quartz Base Materials for the photovoltaic industry0 pages

Factsheet_BM-PV_2012_factsheet 17.02.12 12:41 Seite 1

Quartz Base Materials
for the photovoltaic
industry
Semi-finished quartz glass products
High temperature stability, corrosion resistant,
transparent or opaque
Raw material for: complex systems, reaction chambers,
furnaces, light sources

Quartz glass is a very pure material with exceptional
properties. It has very good chemical resistivity as well
as superior thermal properties. The electrical insulating
and mechanical properties of this special glass are also
superior to other commonly used glass types. It is
available not only in the well-known transparent form but
also in opaque. While clear fused quartz glass has a very
good optical transmission, opaque quartz glass has very
high reflectivity. Opaque quartz glass is therefore used for
its energy saving and thermal shielding properties.
Today, quartz glass plays a key role in the fabrication of
microchips in the semiconductor industry. In the photovoltaic industry quartz glass is used in key processes to
manufacture solar cells; in the production of raw material
such as silicon, as well as during many manufacturing
steps in e.g. light sources, lenses, furnaces or reaction
chambers.
Heraeus Quarzglas has gathered a comprehensive knowledge of this special material in the past 100 years.

Today Heraeus is the largest integrated quartz glass producer that can select from a broad variety of processes.
This variety allows Heraeus Quarzglas to provide tailored
quartz glass solutions by finding the right material for
today’s and future applications.
Heraeus Quarzglas supplies semi finished quartz glass
parts – Base Materials – that are widely used in the fabrication of process chambers and parts of furnace systems
as well as key elements of complex equipment. The product
portfolio consists of a wide variety of standard products
such as tubes, rods and plates of HSQ 300 and OM 100
which are qualified at major players in the semiconductor
and solar industry. In addition to standard products Heraeus
Quarzglas provides individual quartz glass solutions.
With the close relationship to its customers Heraeus
Quarzglas is able to react to new trends and developments.
Heraeus Quarzglas Base Materials has a broad understanding of material properties and therefore helps to find
the quartz glass grade for specific applications.

Technical Properties (typical values)
Density

2.203

Mean expansion coefficient K-1

Tensile strength (approx.) N/mm²

50

0…100 °C

5.1 x10-7

Bending strength (approx.) N/mm²

67

0…200 °C

5.8 x10-7

Compressive strength (N/mm²)

1150

0…300 °C

5.9 x10-7

Electrical resistivity in Ω x cm (20'°C)

1018

0…600 °C

5.4 x10-7

0…900 °C

4.8 x10-7

Modulus of elasticity (N/mm²)

7.25 x 10

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