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Content

Photos 1 I. Basic Physical and Chemical Properties of Talc Porcelain 2 II. Electrical Performance 3 III. Thermal Properties 4 IV. Chemical Properties 5 V. Typical Grades (Common in Industry) 6 VI. Main Applications Customers who bought this product also bought

Talc Porcelain

I. Basic Physical and Chemical Properties of Talc Porcelain

project Indicator range
Main ingredientsMgo·SiO₂ (Magnesium Silicate System)
Bulk density2.7 – 3.1 g/cm³
Water absorption rate≤ 0.2% – 0.5%
Mohs hardness5 – 6 (some high-frequency Ceramics can reach 6 – 7 )
flexural strength50 – 120 MPa
compressive strength200 – 300 MPa
fracture toughness1.5 – 2.5 MPa·m¹/²
coefficient of thermal expansion(6.0 – 8.0) ×10⁻⁶ /℃
Operating temperature≤ 1000 – 1200 ℃

II. Electrical Performance

project Indicator range
Volume resistivity10⁸ – 10¹² Ω·cm
Dielectric strength15 – 25 kV/mm
Dielectric losstanδ ≤ (5–8) ×10⁻⁴ ( 1MHz )
Insulation classHigh frequency insulating material grade

III. Thermal Properties

project index
thermal conductivity2.0 – 2.5 W/m·K
Thermal shock resistance≈ 200 ℃
Fire resistance≥ 1700 ℃
Long-term operating temperature1000 – 1200 ℃

IV. Chemical Properties

  • Good resistance to acids and alkalis
  • It has strong corrosion resistance (stable in most inorganic acid and alkali environments ).
  • High chemical stability, not prone to aging
  • Not easily oxidized

V. Typical Grades (Common in Industry)

  • C221 grade : Ordinary Talc porcelain (high cost performance, used for electrical insulation components )
  • C250 grade : High-performance steatite ceramic (higher strength / insulation )
  • High-frequency talc ceramic : used in communication and radio frequency insulation components

VI. Main Applications

  • Heating element support (heating tube, heater )
  • Fuse tube, fuse
  • High frequency insulators
  • Electronic ceramic base
  • Insulating parts for home appliances
  • Industrial electrical connectors

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