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4750 Magnolia Street
Port Townsend, WA 98368
Tel: 360-379-6707
Toll Free: 877-452-4910
Fax: 360-379-6907
[email protected]
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Special Ceramics for Setter Tiles and Fixtures
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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.
Repton Texture Surface
(also available with smooth surface)
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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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Compositions:
Alumina,
Mullite/Alumina,
Zirconia, Cordierite,
Magnesia,
Aluminum Titantate,
Yttria, and
Special Compositions
Porosity: 0 to 70%
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Special Alumina Fixture
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High Purity Alumina Repton Products
 Click here for printable Repton Data tables
Repton Aluminum Oxide Materials
| Brand | Composition | Density G/cm3 | Porosity % | Bend Strength MPa | Spall Resist
º C | Hot Creep Test
mm Def @ Cº | Thermal exp
ppm/Cº |
Features |
| 1400 | 1500 | 1550 | @ 300 | @ 900 |
| 106 | AlOx 99.99% | 3.9 | 0 | >400 | - |
| | | | | 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 |
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Repton Alumina-Silica Materials
| Brand | Composition
AlOx/SiOx | Density G/cm3 | Porosity % | Bend Strength MPa | Spall Resist
º C | Hot Creep Test
mm Def @ Cº | Thermal exp
ppm/Cº |
Features |
| 1400 | 1500 | 1550 | @ 300 | @ 900 |
| 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 | Lt weight setter |
| 663 | Mullite 80/20 | 2.4 | 29 | >25 | 500 | 1 | 1 | 3 | 4.0 | 5.0 | Zirconia coatable |
Zirconia Repton Materials
| Brand | Composition | Density G/cm3 | Porosity % | Bend Strength MPa | Spall Resist
º C | Hot Creep Test
mm Def @ Cº | Thermal exp
ppm/Cº |
Features |
| 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 | |
| | | 8 | 10 | Hi density |
| 835 | Zr/Ca 4 mol% | 3.3 | 43 | >22 | 350 | 1 | 5 | 11 | 8 | 8 | High porosity |
| 837 | Zr/Ca 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 | | | | | 9.7 | 10.3 | Co-precip, high strength |
| 848 | Zr/Yt 3 mol% | 6.1 | 0 | >1050 | |
| | | 9.7 | 10.3 | |
New Repton Materials
| Brand | Composition | Density G/cm3 | Porosity % | Bend Strength MPa | Spall Resist
º C | Hot Creep Test
mm Def @ Cº | Thermal exp
ppm/Cº |
Features |
| 1400 | 1500 | 1550 | @ 300 | @ 900 |
| 902 | Cordierite
2Mg 2Al 5SiOx | 1.5 | 35 | >35 | 850 | 1 | 13 | | 0.2 | 1 | |
| 914 | Magnesia
MgO | 3.1 | 11 | >98 | 300 | | | | 12 | 14 | |
| 922 | Yttria
Y2O3 | 2.0 | 60 | >7 | | | | | | | |
| EXP 386 | Aluminum Titanate | 2.7 | 14 | >25 | 1000 | | | | 0.0 | 1.7 | |
| 931 | Cordierite
2Mg 2Al 5SiOx | 1.4 | 44 | >19 | 750 | 1 | 15.5 | | 0.1 | 2 | |
| EXP 22 | Magnesia | 3.4 | 0.1 | >89 | 350 | | | | 11.2 | 13.2 | |
| EXP 48 | Cordierite
2Mg 2Al 5SiOx | 2.3 | 0.6 | >66 | 750 | 1 | 4 | | 1 | 2 | |
| EXP 93 | Cordierite
Mullite | 2.2 | 25 | | 900 | | | | | | |
| EXP 36 | Cordierite +
Mullite | 1.9 | 32 | | 950 | | | | 6 | 7.8 | |
| EXP 338 | Alumina 99.6% | 1.0 | 70 | >11 | 350 | 1 | 4 | 11 | 6.6 | 8 | High Porosity |
| EXP 383 | Alumina 96% | 3.7 | 0 | >275 | | | | | | | |
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.
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