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Silicon Dioxide Ceramics for Insulator

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Features

Fused Silica is fundamentally pure silicon dioxide in amorphous form. It is made by heating suitable sands or crystalline quartz to melting temperature and quenching before crystalline rearrangement can occur.
There are applications which do not require the full temperature capability of MgO, or may demand a better electrical isolation at modest temperatures. Compatibility with thermoelement wires should be considered for high temperature use in thermocouples. Performance results with heater elements should be proven by testing.
For modest temperature use, fused silica promises some very interesting insulation resistance results.

Typical Usages

Low power heaters
High dielectric and current leakage requirements
High frequency signal transmission

Grade FUS fused silica crushable insulators - SPECIFICATIONS

Grade FUS is still a developmental product by TATEHO OZARK. It is challenging to make dimensional targets because drying and firing behavior is not fully predictable in advance. Please advise of any critical dimensional limits. Generally speaking, the following guidelines can be expected:

CONTENT	Min	Max	Tolerance
AVERAGE Outside Diameter	0.050"	0.50"	+/- 3 %
Hole Size (1-hole)	0.020" or 12 % of OD	60 % of OD	3 % of OD
Hole Size (multi)	0.020"	25 % of OD or 100 % of wall	3 % of OD
Length	1"	4" or 20 × OD	as fired
Straightness			0.10 %

Chemical Composition (Typical)]

CONTENT	Grade FUS
SiO₂	99.8 %
Al₂O₃	0.11 %
Fe₂O₃	140 ppm

The properties are the typical values and not the guaranteed value.

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