Products made of the SIMAX glass are smooth and imporous, perfectly transparent, catalytically indiﬀ erent, corro-
sion-resistant even in long-lasting operations, suﬃ ciently homogeneous, and free of any heterogeneous particles.
The SIMAX glass is very friendly to the environment and is absolutely unexceptionable from the ecological view-
The Glassworks KAVALIER have been counted among the most important world producers supplying products
from the borosilicate glass, type ..
(main components in percentage by weight)
O + K
80.6 13 4 2.4
water at 98 °C (pursuant to ISO 719) HGB 1
water at 121 °C (pursuant to ISO 720) HGA 1
acids (pursuant to ISO 1776) 1
eﬀ ect of water solution of alkali mixture (pursuant to ISO 695) A2 or better
The SIMAX borosilicate glass . is highly resistant to eﬀ ects of water, neutral and acid solutions, strong acids and
their mixtures, chlorine, bromine, iodine, and organic compounds. Even in long-term eﬀ ects and at temperatures
above °C, this glass outstrips, with its chemical durability, most metals and other raw materials.
Due to eﬀ ects of water and acids, the glass releases only small amounts of mostly univalent ions. At the same time,
avery thin permeable siliceous gel layer is formed on the glass surface, which ensures resistance to further eﬀ ects.
Hydrogen ﬂ uoride, hot phosphoric acid, and alkaline solutions attack the glass surface, depending on concentration
SIMAX: PHYSICAL PROPERTIES
Mean linear and thermal coeﬃ cient of expansion
_ ( °C; °C) according to ISO . x
Transformation temperature Tg. °C
Glass temperature at viscosity d in dPa.s (upper cooling temperature) °C
Glass temperature at viscosity d in dPa.s , (softening temperature) °C
Glass temperature at viscosity d in dPa.s (working range) °C
Highest short-term admissible working range °C
Density l at °C ,g. cm
Modulus of elasticity E (Young modulus) x
Poisson ratio µ .
Thermal conductivity h ( to °C) . x
MECHANICAL STABILITY OF SIMAX GLASS
Mechanical properties and service life of products made of the SIMAX glass are largely done by the stage of their
ﬁ nish, especially in their entirety, i.e. depth failure on surface in manipulation and secondary thermal treatment
Glass mass scratch hardness of 6° of Mohs scale
Admissible tensile stress 3.5 MPa
Admissible bending stress 7.0 MPa
Admissible compressive stress 100.0 MPa