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Refractory Metals - Composites -Special Alloys -
Ceramics -Tungsten - Titanium
Marketech's Metal Tech Group provides refractory metals, composites and special alloys for aerospace, oilfield, industrial, electronic, medical, and defense applications. We provide finished components, bar stock, sheet, tubes, wire, and rods of a wide range of compositions. For large production, we offer MIM, metal injection molding.
Contact us for details of our silica based materials and capabilities.
Repton Texture Surface
REPTON setter tiles, kiln furniture, and special fixtures are lightweight, ridge, and high strength ceramics that resist distortion and spauling, even when thermal cycled many times. They are available with a smooth or a unique textured surface that permits pinpoint contact with the load. Sticking can be eliminated as well as providing a surface that breathes, allowing gasses from the ware to escape.
Applications include firing ceramic capacitors, SOFCs, PZTs, hard and soft ferrites, co-fired substrates and powdered metals. REPTON is available in a wide range of compositions that include a range of alumina, mullite/alumina, zirconia, cordierite, magnesia, and aluminum titantate.
Construction: Repton tiles and shapes are gel cast to precise and consistent dimensions and then high fired to retain stability. In addition to flat setter tiles, this process can be used formed saggers, trays, crucibles, and tubes.
Sizes: Standard sizes are up to 13" x 13" - Custom shapes up to 24" x 24" and thickness from 1 to 50 mm. Note that larger sizes require thicker tiles.
Surface Finish: Smooth or textured to reduce sticking and allow for product out gassing. A zirconia coating can be applied and fired on the surface to reduce chemical interaction.
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Repton Texture Surface
(also available with smooth surface) |
Compositions:
Alumina, Mullite/Alumina,Zirconia, Cordierite, Magnesia, AluminumTitantate, Yttria, and
Special Compositions
Porosity: 0 to 70% |
| High Purity Alumina Repton Products |
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Repton Aluminum Oxide Materials |
| Brand |
Composition |
Density G/cm3 |
Porosity % |
Bend Strength MPa |
Spall Resist °C |
Hot Creep Test mm Def@C° |
Thermal exp ppm/C° |
Features |
| |
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1400 |
1500 |
1550 |
@300 |
@900 |
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006
106 |
AlOx 99.99%
AlOx 99.6% |
3.9
3.9 |
0
0 |
>400
>392 |
- |
- |
- |
- |
- |
- |
Ultra High Purity |
| 115 |
AlOx 99.6% |
3.2 |
11 |
>255 |
500 |
2 |
5 |
14 |
6.5 |
8.0 |
High Density Purity |
| 125 |
AlOx 99.6% |
3.4 |
1 |
>182 |
500 |
1 |
1.5 |
2 |
6.5 |
8.0 |
High Purity Standard |
| 136 |
AlOx 99.6% |
3.9 |
0 |
>392 |
550 |
2 |
6 |
15 |
6.0 |
8.0 |
Molding-structural |
| 214 |
AlOx 99.6% |
2.6 |
35 |
>56 |
450 |
2 |
17 |
- |
- |
- |
High porosity/ purity |
| 202 |
AlOx 99.6% |
1.8 |
55 |
>22 |
400 |
- |
- |
- |
- |
- |
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| 201 |
AlOx 99.6% |
1.5 |
63 |
>7 |
400 |
2 |
- |
- |
- |
- |
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Repton Alumina-Silica Materials
| Brand |
Composition |
Density G/cm3 |
Porosity % |
Bend Strength MPa |
Spall Resist °C |
Hot Creep Test mm Def@C° |
Thermal exp ppm/C° |
Features |
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1400 |
1500 |
1550 |
@300 |
@900 |
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| 314 |
Mullite 93/7 |
2.6 |
28 |
>13 |
600 |
1 |
1 |
1 |
4.2 |
6.0 |
Superior hot creep |
| 504 |
Mullite 90/10 |
2.5 |
32 |
>7 |
650 |
1 |
1 |
4 |
3.9 |
5.0 |
Max spall res. |
| 601 |
Mullite 80/20 |
1.0 |
70 |
>11 |
350 |
1 |
4 |
11 |
3.8 |
5.0 |
Extra light weight |
| 632 |
Mullite 80/20 |
1.5 |
56 |
>27 |
400 |
1 |
1 |
5 |
4.0 |
5.0 |
Light Weight setter |
| 663 |
Mullite 80/20 |
2.4 |
29 |
>25 |
500 |
1 |
1 |
3 |
4.0 |
5.0 |
Zirc |
Zirconia Repton Materials
| 1400 |
1500 |
1550 |
@300 |
@900 |
| 827 |
Zr/Yt 3 mol% |
4.1 |
30 |
>96 |
- |
- |
- |
- |
- |
- |
Co-precip. high porosity |
| 868 |
Zr/Yt 8 mol% |
6.0 |
0 |
>160 |
500 |
- |
- |
- |
8 |
10 |
High density |
| 835 |
Zr/Yt 4 mol% |
3.3 |
43 |
>22 |
350 |
1 |
5 |
11 |
8 |
8 |
High porosity |
| 837 |
Zr/Yt 4.4 mol% |
4.2 |
27 |
>18 |
500 |
1 |
3 |
6 |
8 |
8 |
Good spalling characteristics |
| 838 |
Zr/Yt 3 mol% |
6.1 |
0 |
>1050 |
450 |
- |
- |
- |
9.7 |
10.3 |
Co-precip. high strength |
| 848 |
Zr/Yt 3 mol% |
6.1 |
0 |
>1050 |
400 |
- |
- |
- |
9.7 |
10.3 |
New Repton Materials
| 1400 |
1500 |
1550 |
@300 |
@900 |
| 902 |
Cordierite 2Mg 2Al 5SiOx |
1.5 |
35 |
>35 |
850 |
1 |
13 |
- |
0.2 |
1 |
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| 914 |
Magnesia MgO |
3.1 |
11 |
>98 |
300 |
- |
- |
- |
12 |
14 |
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| 922 |
Yttria Y203 |
2.0 |
60 |
>7 |
- |
- |
- |
- |
- |
- |
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| EXP 386 |
Aluminum Titanate |
2.7 |
14 |
>25 |
1000 |
- |
- |
- |
0.0 |
1.7 |
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| 931 |
Cordierite 2Mg 2Al 5SiOx |
1.4 |
44 |
>19 |
750 |
1 |
15.5 |
- |
0.1 |
2 |
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| EXP 22 |
Magnesia |
3.4 |
0.1 |
>89 |
350 |
- |
- |
- |
11.2 |
13.2 |
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| EXP 48 |
Cordierite 2Mg 2Al 5SiOx |
2.3 |
0.6 |
>66 |
750 |
1 |
4 |
- |
1 |
2 |
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| EXP 93 |
Cordierite Mullite |
2.2 |
25 |
- |
900 |
- |
- |
- |
- |
- |
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| EXP 36 |
Cordierite + Mullite |
1.9 |
32 |
- |
950 |
- |
- |
- |
6 |
7.8 |
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| EXP 336 |
Alumina 99.6% |
1.0 |
70 |
>11 |
350 |
1 |
4 |
11 |
6.6 |
8 |
High porosity |
| EXP 383 |
Alumina 96% |
3.7 |
0 |
>275 |
- |
- |
- |
- |
- |
- |
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Testing Notes:
Spalling Test: A 200 x 200 x 2 mm test specimen is supported at the corners by 25 pillars. A 50 gram weight is placed in the center and the plate and pillars are inserted and removed from a furnace at temperature. The highest temperature where no cracking occurs after 5 cycles is determined to be the Spall Resistant Temperature
Hot Creep Test: A 180 x 25 x 2 mm specimen is supported across a 160 mm span with a 35 gram load placed at the center of the specimen. The specimen is heated for 5 hours at several temperatures and the deflection in mm is measured and recorded.
Repton Data Tables (pdf 200k)
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