Alumina Boards, Discs & Cylinders
TYPE Buster
Features
- 1600°C, 1700°C & 1800°C Rated Versions
- Alumina or Mullite Bonded
- High Strength
- Low Thermal Conductivity
- 100% Fibers & Binder - No Fillers
- Excellent Machinability
- Non-RCF Composition
Zircar alumina insulation Type Buster is a rigid, fibrous ceramic material produced by vacuum forming alumina fibers with either a high purity alumina binder, as in BusterA or with silica binders in BusterM that form a more thermal shock resistant mullite bond. BusterM2 is a mullite bonded 1800°C version that exhibits complete dimensional stability to 1700°C. Both BusterA and BusterM chemistry is offered in a range of custom and standard densities. Standard board densities are 15, 30, 35 and 45 pounds per cubic foot.
Buster is available in boards, cylinders and custom machined parts. All Buster boards are pre-fired for organic-free use. Their fine grain quality and uniform binder distribution enables precision machining. All these features make Buster an ideal insulation material for hot face insulation, setters and trays in rapid heat electric furnaces and other types of thermal process systems.
High purity silica is the binder in BusterM. Silica's strong bond gives BusterM excellent high temperature strength and dimensional stability. BusterA has a high purity alumina bond making it well suited to use in high vacuum and reducing atmosphere applications where silica cannot be tolerated, such as in bright annealing furnaces with H2 atmospheres. They both have high electrical resistivity at elevated temperatures allowing them to be used in direct contact with many different resistance heating elements.
PROPERTIES & CHARACTERISTICS
| M-45 | M2-35 | M-35 | A-30 | M-15 | |
|---|---|---|---|---|---|
| Main Feature | High Strength | 1800°C Premium | Hot Strength | Pure Alumina | Low K |
| Use Limit °C ** | 1600 | 1800 | 1725 | 1600 | 1600 |
| Density - pcf | 45 | 39 | 35 | 30 | 15 |
| Porosity % | 70 | 80 | 83 | 85 | 93 |
| Alumina Content, Weight% | 85 | 80 | 80 | 97+ | 80 |
| Melting Point °C | 1870°C | 1870°C | 1870°C | 1870°C | 1870°C |
| Shrinkage 1 hr @ 1700°C | 2% | -0.1% | 0.6% | 1.4% | 4% |
| Specific Heat BTU/lbF | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
| Thermal Expansion / °C | 5.0 X 10-6 | 5.0 X 10-6 | 5.0 X 10-6 | 7.5 X 10-6 | 5.0 X 10-6 |
| Tensile Strength, PSI | 1300 | 460 | 608 | 250 | 210 |
| Compressive Strength, PSI @ 2% compression II to thickness | 600 | 266 | 250 | 78 | 30 |
** MAXIMUM uSE LIMIT IS DEPENDENT ON VARIABLES INCLUDING THERMAL AND MECHANICAL STRESSES AND THE CHEMICAL ENVIRONMENT IN WHICH IT IS USED
Availability and Ordering Information
Zircar Alumina Insulation Type Buster is available in standard sized Boards, Discs, and Cylinders, which are listed on the following page with their ordering item number. Please contact our Sales Department for Pricing and Availability.
- To order one of our standard sizes, specify the Quantity you wish to order, Item Number and Product Type and Size. For example: 3 ea., Item GX001, BusterM-35, 13" x 13" x 1"
- Our forming process and machining capabilities allow for a wide variety of custom parts to be made. Please contact us with your special requirements and we'll be happy to provide you with a quotation.
| BusterM-35 Standard Sizes | |
|---|---|
| Board, 13" x 13" x 0.25" TK | GX011 |
| Board, 13" x 13" x 0.50" TK | GX012 |
| Board, 13" x 13" x 0.75" TK | GX013 |
| Board, 13" x 13" x 1.00" TK | GX001 |
| Board, 13" x 13" x 1.50" TK | GX003 |
| Board, 13" x 13" x 1.75" TK | GX017 |
| Board, 13" x 13" x 2.00" TK | GX076 |
| BusterM2-35 Standard Sizes | |
|---|---|
| Board, 12.5" x 12.5" x 0.25" TK | |
| Board, 12.5" x 12.5" x 0.50" TK | |
| Board, 12.5" x 12.5" x 0.75" TK | |
| Board, 12.5" x 12.5" x 1.00" TK | GX004 |
| Board, 12.5" x 12.5" x 1.50" TK | GX005 |
| BusterA-30 Standard Sizes | |
|---|---|
| Board, 13" x 13" x 0.50" TK | GX090 |
| Board, 13" x 13" x 1.00" TK | GX068 |
| Board, 13" x 13" x 2.00" TK | GX092 |
