MACHINED CERAMICS
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When
small quantity orders for prototype samples or short
production runs do not justify construction of a production
tool, our machined ceramics are the best solution.
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These materials are machined in the "green" state to exacting tolerances and then kiln fired. |
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Standard
machined tolerances are 1/2% or 0.005" per inch, with a
minimum of 0.005". Tighter tolerances may be available
depending upon the specific configuration.
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Our
primary machined ceramics are Alumina Silicate and L-5
Steatite. These materials are well suited for both
electrical and high temperature applications. See the table
below for the properties of Alumina Silicate and L-5
Steatite. Other machinable materials are also available for specific
applications.
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Machining
methods include saw cutting, milling, turning, and grinding.
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Most
orders ship within two weeks.
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PROPERTIES
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Units |
Aluminum Silicate |
L5
Steatite |
Cordierite |
Mullite |
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Color |
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marbled tan |
tan |
Buff |
Buff |
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Water
Absorption |
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% |
2.5 |
0 |
11 -
15 |
11 -
16 |
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Specific Gravity |
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2.3 |
2.74 |
2.7 |
2.8 |
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Thermal Expansion |
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25 -
100 deg C |
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1E-6
per deg C |
2.9 |
9.6 |
3.45 |
6.8 |
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25 -
300 deg C |
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1E-6
per deg C |
--- |
9.5 |
--- |
--- |
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25 -
400 deg C |
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1E-6
per deg C |
--- |
--- |
3.62 |
7.11 |
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25 -
600 deg C |
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1E-6
per deg C |
--- |
8.7 |
--- |
--- |
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25 -
700 deg C |
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1E-6
per deg C |
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--- |
3.64 |
6.68 |
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25 -
800 deg C |
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1E-6
per deg C |
-3.6 |
--- |
--- |
--- |
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Tensile strength |
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psi |
3,000 |
10,000 |
1200 |
1200 |
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Compressive Strength |
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psi |
25,000 |
85,000 |
15000 |
15000 |
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Flexural Strength, MOR |
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psi |
10,000 |
20,000 |
1550 |
1500 |
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Hardness |
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Mohs
Scale |
6 |
7 |
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Maximum Operating Temp |
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°F |
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2350 |
2500
- 3000 |
2500
- 3000 |
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Dielectric Strength |
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0.25" |
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volts/mil |
100 |
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40 |
40 |
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0.125" |
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volts/mil |
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270 |
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Dielectric Constant |
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25
deg C & 1 mHz |
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5.3 |
5.9 |
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Power
Factor |
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25
deg C & 1 mHz |
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0.01 |
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Loss
Factor |
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25
deg C & 1 mHz |
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0.053 |
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Volume Resistivity |
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25°C |
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ohm -
cm |
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>1.0E
+ 15 |
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300°C |
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ohm -
cm |
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1.9E
+ 14 |
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700°C |
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ohm -
cm |
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6.6E
+ 09 |
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The
information and data presented on this sheet is based on
testing and research and believed to be accurate.
Due to the variant nature of mineral deposits as
they are mined, the user is responsible for determining
the suitability for their process and their products /
production needs. |
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AP&P
does not warrant the results and disclaims all liability
for any inaccuracies or omissions,
or for any direct, special or indirect or
consequential damages or losses of whatever kind
resulting from any causes, or from products and
information mentioned on this sheet.
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Akron Porcelain &
Plastics Company Ideal
Insulator |
Dry Process Molding
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Wet Process Molding
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Custom Injection Molding
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