HMG1 FractalBallsT

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 Product Highlights
Low density (~1.1 g/cc)
High porosity (70%)
High temperature (up to 1900°C)
Castable (with FractalPasteT)
FIBERFREET

 

FractalBallsT are high strength, high porosity ceramic balls available in the HMG1 material and HA material.
FractalinsT,  HDFractalinsT, and HA FractalinsT are preformed structures (boards and bricks).
FractalinsT have a density of ~0.7g/cc, and HDFractalinsT have a density of ~1.1g/cc.
HA FractalinsT are made of high Alumina material.  HD FractalinsT are made of HMG1 material.

PDF File(18k) 
Picture of 1mm size HMG1 FractalBallsT
Macropicture of 3mm size HMG1 FractalBallsT

Material Safety Data Sheet

reviewed 2009


 
Product Specifications
  3mm 5mm
Service Temperature   °C (See FAQ's) 1900 1900
Density g/cm3  ~ 1.1 ~1.1
Porosity, %   ~70 ~70
Surface Area(BET), cm2/g 950 990
Liquid (chemical) absorption, wt% 50  50
Chemical Composition
     % Al2O3
     % SiO2 (diverse forms) not exceeding (mostly combined with    alumina)
     Impurities 
     Free silica		 ~92
8

<0.5
nil*

 ~92
8

<0.5
nil*
Loss on ignition 0 0
Cold Compression strength (N/mm2 or MPa) for each individual ball - 1 for 3mm
ball size
Linear shrinkage at service temperature 24h in % <1% <1%
Nominal thermal conductivity W/m, K 1200°C 0.2 0.2
Usual dimensions in mm (range) 2-3.5 4-5
                        * Nil below detectable levels
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FRACTALBALLST may be used as thermal insulation, chemical substrates or as 
structural materials when bonded with FRACTALPASTET.  These have multi-purpose use. 
When bonded to each other they are called FractalinsT.

  • Use as thermal insulation: FRACTALBALLT has very low density, low thermal conductivity, high strength, and high melting point; it can be formed into any shape and size and be used in any refractory/insulation parts for high and low temperature application. 
  • Use for high surface reactivity: FRACTALBALLST have very high porosity/low density, high strength, and high melting point. They may be used for high temperature filter and membrane substrate applications.  
Typical Applications are:
  •      Light weight structure materials.
  •      Composite manufacture reinforcement additive for metal, ceramic, or polymer. 
  •      Armor, bio-ceramic, abrasive brake pads etc. 
  •      Coatings for surfaces (metals, ceramics, polymers.)
  •      Thermal insulation
  •      Fire protection and stops
  •      High temperature furnace linings
  •      Kiln furniture
  •      Gas combustion burners
  •      Repairing or relining refractory cracks and holes
Other applications are:
  •      Filter 
  •      Molten metal castings (aluminum, copper, iron)
  •      Steam cleaning. 
  •      Apply as light weight coating for vehicles.
  •      Oil trapping and recovery; grease filters; chemical and water purification processes.
  •      Hot-gas filter substrates for electrode. 
  •      Electronic substrate carriers for bioreactors. 
  •      Desiccants 
  •      Substrates for catalytic converters 
  •      Use as light weight structural materials 
  •      FRACTALBALLT has a unique microstructure, very low density, high strength, and high hardness


What is the difference between FRACTALINST and FRACTALPASTET bonded FRACTALBALLST?

The FRACTALINT material and the FRACTALPASTET bonded FRACTALBALLST are bulk materials consisting of stacked/bonded FRACTALBALLST. However, because of differences in the manufacturing process, they display slightly different properties as shown below. FRACTALINST are factory products shapes/boards made by a special joining process. The FRACTALPASTET  bonded FRACTALBALLST, on the other hand, are made into shapes/boards with the mixing and firing of FRACTALBALLST and FRACTALPASTET by the user. (See section on how to bond FRACTALBALLST with FRACTALPASTET). The HMG1 material, of which the FRACTALBALLST are made, and the FRACTALPASTET material may be used up to temperatures in excess of 1850°C. All trade marks on this document belong to MATTECH CORPORATION unless otherwise stated. 

FRACTALBALLT is an unique lightweight, non-hollow porous ball with a very low density and high strength. The material of the FRACTALBALLST (called HMG1) has excellent heat, chemical and mechanical stability; the spheres have low thermal conductivity and high thermal shock resistance. The spheres are sold in a fully fired condition with excellent dimensional stability up to 1900°C. FRACTALBALLST are environmental-friendly materials: they do not contain any hazardous materials such as organic volatents or fibrous materials, and will not produce any smoke or odor when heated. They also have desirable chemical, physical and mechanical properties, such as inertness to chemical attack (solvents, acids, alkalies, and detergents), non-wettability by molten metals such as aluminum, high thermal stability, high strength, and micro-biological stability. These features permit the FRACTALBALLST to be used in various applications. 

FRACTALBALLST, which are made from the HMG1 material, may be used in loosely stacked form or bonded into any size and shape part by bonding the FRACTALBALLST with FRACTALPASTET. These flexible processing possibilities allow FRACTALBALLST to be use in various technologies.

1mm Ball
3mm Ball
5mm Ball
Surface Microstructure of different size FractalballsT.  The micron marker is 10 microns.

Properties of Material HMG1:

Color: White
Nominal Composition,wt %
SiO2: (diverse forms) not exceeding 8% (mostly combined with Alumina)
Al203: ~92%
Impurities: less than 1%
Ball Density, g/cc: ~1.1
Stacked Density,g/cc: ~0.7
Diameter,mm: (major range 1- 5 mm)
Maximum Use Temperature,°C: up to1900° C Load carrying capacity diminishes after 1870°C. (See FAQ's)
Ball Porosity, % (average): 70
Strength: Each 3mm ball supports approximately 10 kg of Load. High Strength.
FractalBallsT have a porosity of about 70%; when loosely stacked the porosity is about 85%, FractalPasteT bonded FractalBallsT have a porosity of 75% whereas FractalinsT have a porosity of about 80%. FractalBallsT glued with FractalPasteT has a strength of 5 MPa whereas FractalinsT have a strength of about 6 MPa. (Our data is approximate and changes from batch to batch).

Patents Applied For and Pending. FRACTALBALLST, FRACTALINS T, FRACTALPASTET, FIBERFREET, and FRACTALBALLT are trademarks of MATTECH CORPORATION.

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Disclaimer:
All properties and dimensions shown above are only approximate and may change from batch to batch. If a specific property is critical for your application, please contact Mattech for details on the possible guarantee bounds for that property. Mattech Corporation encourages safe handling practices for all its products.  The use of proper eye wear, gloves and masks is highly recommended and it may be unsafe not to use them when handling products.
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