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Materials Descriptions
A-1 Cordierite:
This composition has excellent thermal shock resistance and good
electrical resistivity. Maximum use temperature is 2150°F. Within
this temperature range, this composition is probably the most
economical electrical insulating material commercially available.
K-9 Cordierite - Mullite:
This composition is a cordierite-mullite mixture, with physical
properties intermediate between regular cordierite and mullite.
The thermal shock resistance is similar to cordierite and is rated
excellent. In some shapes K-9 composition is more amenable to
pressing than regular cordierite. The selection of this often
relates to manufacturing technology rather tan to application.
Maximum use temperature is 2150°F.
R-21 Mullite:
This refractory composition is recommended for applications requiring
dimensional stability and good thermal shock resistance at temperatures
up to 2650°F. Minimal glassy bond makes it an excellent material
for applications where stable heating element supports are of
particular importance. This material is supplied in both pressed
and extruded forms.
B-47 Mullite:
A refractory composition combining cordierite and mullite and
having the preferred properties of both minerals. This composition
has excellent thermal shock resistance, good dimensional stability
to 2250°F plus good mechanical strength.
B-60 Cordierite:
A refractory composition combining cordierite, cristobalite, and
mullite. The composition contains a small sized cordierite grog
and therefore should have a smoother surface than other bodies
that contain grog. This material displays good mechanical strength,
shock resistance, and dimensional stability up to 2150°F. The
cordierite grog reduces the possibility of laminations that are
commonly seen in large thick walled extruded items made from cordierite.
A-5 Cordierite:
A-5 is a highly refractory cordierite, our best grade of cordierite.
It has excellent thermal shock resistance and will provide good
electrical insulation at elevated temperatures. This composition
is superior to other cordierite compositions because it contains
a greater amount of cordierite plus having a higher alumina content.
Superceram:
Superceram is a specially developed alumina refractory that is
an intermediate composition between mullite and high alumina.
It is extremely dense, abrasion resistant, fully vitrified, with
a high strength at both room temperature and elevated temperature.
It has good thermal shock resistance and fair thermal conductivity.
Maximum recommended operating temperature is 2300°F.
Alcast-99:
Alcast-99, a specially developed refractory composition having
the highest possible alumina content using commercially available
alumina oxide and is recommended for those applications requiring
extreme refractoriness. Often used in high temperature furnaces
with atmospheres having very low dew points. Maximum recommended
us temperature is 3400°F.
M-19-A:
M-19-A is a class 92 alumina oxide refractory with mullite as
the secondary phase. This composition is chemically inert, highly
refractory and serviceable to approximately 3000°F.
H-8-F:
A refractory class 75 alumina oxide composition which will provide
service to 3000°F. This composition has excellent thermal shock
resistance and is machinable in the burned state. It provides
an outstanding refractory service in vacuum furnace.
PA-1:
A porcelain based formulation containing sufficient refractory
grade alumina oxide to provide a dense, vitrified, abrasive refractory
material. Maximum recommended operating temperature 2150°F.
Porcelain:
A standard, fully fired, hard porcelain with low absorption, suitable
for low tension electrical applications and those applications
requiring conventional porcelain composition. may be glazed or
plain. Generally not used for refractory applications.
For more information on these and other products, please contact
us at usr@eracinc.com. |
