 General Ordering Info
Alumina Tubes & Rods
99.8% Alumina Rods
Alumina Plates & Disks
Bolts, Nuts & Washers
Standoff Ceramic Insulators
Fishspine Beads
 Machinable Ceramics
Grade A Lava
| 12" L Rods |
| Diameter |
| 1/2" |
| 5/8" |
| 3/4" |
| 1" |
| 1 1/4" |
| 1 1/2" |
| 1 3/4" |
| 2 |
| 2 1/4" |
| 2 1/2" |
| 2 3/4" |
| 3" |
| 3 1/2" |
| 4" |
| 4 1/2" |
| 5" |
|
| 12" L blocks |
| Length X Width |
| 1"X1" |
| 1 1/4"X1 1/4" |
| 1 1/2"X1 1/2" |
| 1 3/4"X1 3/4" |
| 2"X2" |
| 2 1/2"X2 1/2" |
| 3" |
|
| 12"X12" Plates |
| Thickness |
| 1/4" |
| 3/8" |
| 1/2" |
| 3/4" |
| 1" |
| 2" |
|
All dimensions are minimum dimensions.
Please contact our Customer Service or Sales Department for pricing and availability of these standard parts.
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|
Property |
ASTM
Method |
Units |
Fired Lava |
Unfired Lava |
Color |
- |
- |
buff-tan |
gray |
Gas Permeability |
- |
- |
porous |
porous |
|
Density |
C 20-97 |
g/cc |
2.30 |
2.60 |
Hardness |
- |
Mohs Scale |
6 |
2 |
Water Absorption |
C 20-97 |
% |
3 |
2.5 |
Flexural Strength |
F 417-87 |
psi |
10,000 |
4,000 |
Tensile Strength |
- |
psi |
3,000 |
1,000 |
Compressive Strength |
- |
psi |
25,000 |
11,000 |
|
|
C.T.E., 25 - 100°C |
C372-96 |
x10-6/°C |
2.9 |
2.5 |
|
C.T.E., 25 - 300°C |
- |
- |
3.3 |
- |
|
C.T.E., 25 - 600°C |
- |
- |
3.6 |
3.1 |
Thermal Conductivity 25°C |
C408 |
W/m-K |
2 |
- |
|
Max Use Temperature
(Non-Loading) |
- |
°F |
2000 |
1200 |
°C |
1100 |
650 |
|
Dielectric Strength
(.125" Thick) |
D149-97A |
V/mil |
100 |
80 |
Dielectric Constant
@1MHz |
D150-98 |
- |
5.3 |
5.8 |
|
|
Note: The information in this data sheet is for design guidance only. STC does not warrant this data as absolute values. Forming methods and specific geometry could affect properties. Slight adjustments can be made to some of the properties to accommodate specific customer requirements. Most of the dense materials in the table are resistant to mechanical erosion and chemical attack. STC has performed ASTM testing qualification for certain compositions, in accordance with ASTM D2442. Please consult our technical staff for appropriate material and specifc test results.
Note: In addition to the above compositions, STC offers a wide range of alternative materials. Please contact one of our applications engineers for material requirements that may not be shown above. |
Click Here if you would like a printable copy of the above chart.
|
