1. 99.7% Alumina
2. Diameter: 3-50mm
3. High Temperature Resistance: 1750C
4. Excellent wear-resisting
5. Density: 3.70g/cm3
6. Voltage resistance: 16-25V
Our 99 High Alumina ceramic balls are in chemical composition 99+% Alumina and a maximum 0.2wt% SiO2. Because of its high alumina content and low silica (SiO2 ), it's a very excellent and ideal product for high temperature and steam applications, such as secondary reformers in ammonia processing, where leached silica will coat downstream equipment or foul the catalyst bed.
99 High Alumina ceramic balls have very excellent thermal properties, with its high density high-temperature resistance 1750C, also it's a good choice for heat retention or equilibration media.
Alumina Ceramic Balls Main Performance Index:
Specification | Common Ceramic Balls | Medium-Alumina Ceramic Balls | High-Alumina Ceramic Balls | 99%-Alumina Ceramic Balls | |
Al2O3(%) | 17-23 | 23-30 | 47-56 | 90-92 | 99 |
Fe2O3(%) | <1 | <1 | <1 | <1 | 0.2 |
CaO(%) | <0.5 | <1.5 | <2 | <4 | 0.2 |
MgO(%) | <0.5 | <2.5 | <0.5 | <0.5 | 0.1 |
K2O+Na2O(%) | <4 | <4 | <3.5 | <4 | >0.5 |
TiO2 | / | <0.5 | <0.1 | <0.1 | 0.5 |
Leachable Fe2O3 | / | <0.1 | <0.001 | <0.001 | |
Water Absorption | <0.5% | <0.5% | <2 | <3 | 2.0-3.6 |
Heaping weight g/m3 | 2.3-2.4 | 2.3-2.4 | 2.6 | 3.5 | 3.0-3.6 |
Operation Temp(max) | >1100C | >1100C | 1480C | 1750C | / |
Mohs Hardness | >6.5 | >7 | >7 | >7 | >7.5 |
Alumina Ceramic Balls Standard Sizes:
3mm, 6mm, 9mm, 13mm, 16mm, 19mm, 25mm, 50mm
Note: Other size can be produced according to customers’ requirement.
Alumina Ceramic Balls Physical Properties:
Index | Value |
Leachable Iron | <=0.01% |
Apparent Porosity by Weight | >=7.0% |
Moh's Hardness Scale | >8.0 |
Water Absorption | <4.0wt % |
Acid Resistance | >99.8% |
Thermal Conductivity | 0.7-0.8w/m 2.k |
Thermal Expansion @500 Centigrade | 0.10% |
Thermal Shock Stability, 1000C then water cooling | 10 times |
Max. Operating Temperature | 1750C |
Specific Density | 3,700 kg/m3, 3231 lb /ft 3 |
Bulk Density (Packing Density) | 2,100 kg/m3, 131 lb /ft 3 |
Alumina Ceramic Balls Main Characteristics:
--High Purity Alumina Structure,
--Excellent Thermal Properties
--High Pressure Insistance
--Excellent Chemical Stability with Strong Resisting Of Acid, Alkaline and Organic Impregnant.
Notice for Using Alumina Ceramic Balls:
1. Alumina products are fragile. Please handle them carefully and avoid collision during unpacking, transportation, handling and cleaning
2. Check whether any micro-cracks exist before using alumina products. Products with micro-cracks should not be used.
3. Alumina products should be completely dry before usage. If they get wet, let the crucible or tube dry naturally before using them. If dry crucibles by placing in a dryer or oven, make sure that the dry process goes slowly.
4. Do not load too many materials in Alumina Tubes, which can increase the possibility of uneven heating.
Alumina Ceramic Balls Package:
25kg/Plastic Bag or 250kgs/Steel Drum, Palletized
Polyfoam Filled, Wooden Box Outside.
Alumina Ceramic Balls Application:
Ceramic, building materials, Chemical, inks, cosmetics etc.
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