Yixing City Kam Tai Refractories Co.,ltd
Yixing City Kam Tai Refractories Co.,ltd Professional Manufacturer of Refractory Kiln furniture and Technical Ceramic
Add to Cart
Customize Aluminum Oxide Ceramic Kiln Stilts High Temperature Resistance
1. Description
Aluminum oxide (Al2O3), commonly known as alumina, is extensively used as an engineering ceramic due to its high performance at a cost-effective price. Typically, alumina is available in grades from 88% to 99.99% purity with properties varying accordingly. Zirconia-toughened alumina is a modified, stronger grade of alumina.
We carry a variety of size post & stilts. However there are so many size shelves that you need to email us to check on your size and availability. Posts are what you use to stack the shelves in a kiln. Tile racks in this section are only low fire, high fire shelves are not made. Stilts are what you use to place under a glazed item during firing so it will not bond to the kiln shelve.
We supply a range of ceramic kiln firing metal pinned stilts. Stilts are used to allow glazed ware to be protected all over, rather than dry footing items. Stilting ceramic pieces help keep moisture out of the ware and help against crazing. Ceramic stilts are also a good aid against protecting the kilns shelves from glaze. Please note, to help prolong the life of your kiln furniture/stilts it is advisable to apply some batt wash periodically.
We have 7 size , you can choose.
| Property | Units | ||||
| Al2O3 Content | % | 96 | 98 | 99.5 | 99.7 |
| Density | g / cm3 | 3.70 | 3.80 | 3.90 | 3.92 |
| Color | - | White | White | Ivory | Ivory |
| Compressive Strength @ 25 C | Mpa | 2229 | 2091 | 2512 | 2350 |
| Tensile Strength @ 25 C | MPa | 200 | 200 | 248 | 252 |
| Flexural Strength @ 25 C | MPa | 331 | 276 | 324 | 320 |
| Elastic Modulus @ 25 C | GPa | 290 | 331 | 366 | 380 |
| Hardness : Knoop Rockwell | (Gpa) Kg/mm2 R45N | (11.7) 1196 79 | (12.5) 1276 77 | (14) 1428 85 | (15) 1510 90 |
| Thermal Conductivity @ 25 C | W / m-Deg K | 20.8 | 28.1 |
30.7 | 31.6 |
| Coefficient of Thermal Expansion @ 25-1000 C | 1 X 10-6 / Deg C | 7.9 | 8.5 | 8.1 | 8.0 |
| Specific Heat @ 25 C | cal / g / Deg C | .184 | .184 | .182 | .180 |
| Maximum Working Temp. | Deg C | 1650 | 1650 | 1700 | 1700 |
| VolumeResitivity @25C @700 C | ohm-cm ohm-cm | 1 X 10-13 1 X 10-8 | 1X 10-13 2.2 X 10-9 | 1 X 10-13 6 x 10-7 | 1 X 10-13 6 x 10-7 |
| Dielectric Strength (@Thickness) 100Mils | ac volts per mil | 350 | 340 | 335 | 330 |
| Dielectric Constant 1Mhz @25C | e' / eo | 8.6 | 9.4 | 9.7 | 10.0 |
| Dissipation Factor 1 Mhz @25C | Tan Delta | .0004 |
.0003 |
.0003 | .0002 |
