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Chemicals

Chemicals

Synthetic Magnesite

Synthetic Magnesite "MAGTHERMO®"

Generally Magnesite is a natural ore of Magnesium carbonate(MgCO3). Our "MAGTHERMO" is Magnesite made from seawater by our special synthetic method.
It is suitable as a thermal conductive filler for plastics.

Advantages

・High thermal conductivity, small specific gravity.
・Very soft particle with 3.5 in Mohs hardness.
・Unhydrous Magnesium carbonate and applicable to highly heat-resistant engineering plastics because of high heat stability up to 500℃.
・Excellent dispersibility due to fine, uniform particles with small specific surface area.

General Characteristics
Composition formula MgCO3
Appearance White powder
Crystal system Trigonal
Specific gravity 3.04
Mohs hardness 3.5
Refractive index 1.72
Decomposition temperature approx. 500℃
Typical data
Grade MS-S MS-L MS-PS
Average particle size(μm) 1.2 8.0 21.0
Specific surface area (BET)(m2/g) 5.5 1.2 0.7
Bulk density(g/ml) 0.86 0.85 1.16
MgO(%) 47.5 48.0 47.8
CaO(%) 0.36 0.27 0.09
Al2O3(%) 0.019 0.006 0.002
Fe2O3(%) 0.02 0.01 0.001
SiO2(%) 0.14 0.04 0.01
Particle size distribution
粒度分布データ
Thermal conductivity
熱伝導率データ
SEM
SEM
Electrical properties
  MgCO3 Al2O3
Electrical resitivity(Ω・cm) 3.0×1016 7.3×1015
Relative permattivity 4.8 5.7
※70% in EEA resin

Applications

  • Thermal conductive filler
  • Anti-blocking agent
  • Far-infrared ray absorbent

 

 

 

Synthetic Magnesite in Ball-shape / Spindle-shape (Prototype)

Ball-shape improves fillability and Spindle shape improves physical properties.

Ball-shaped Synthetic Magnesite

SEM
SEM
Particle size distribution
Particle size distribution

Spindle-shaped Synthetic Magnesite

SEM
SEM
Particle size distribution
Particle size distribution
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