Electrical grade magnesium oxide

Type   MTA

Characteristics

     MTA is a medium-high temperature powder with light silicone treatment, mainly used in air heating elements of medium wattage loading, and it is suitable for copper tube and steel tube. It can stand 1050℃ annealing and requires immediate sealing.

Chemical analysis (%)

      MgO         CaO         Al2O3         Fe2O3         SiO2

      ≥94.0         ≤1.5        ≤0.9          ≤0.5          ≤2.5

Particle distribution

     Mesh       +40      +60      +80      +140     +200      +325    -325

     Dia(um)    +425     +250     +180      +106     +75       +45     -45

     Quantity(%)  0-0.1    24±6    26±6     26±6    12±3     11±3    5±3

Tap density

     2.38±0.04g/cm3

Flow

     Ford cup no.3 (φ2.165mm-2.185mm): 145±20 s/100g

     Ford cup no.4 (φ3.97mm-4.01mm):    34±3 s/100g

Electrical property

Packing

     25 kg in a plastic plaited bag; or 25 kg in a carton and 2 tons on a pallet.  Special packing is available on requirement.

Security and storage

     Electrical grade magnesium oxide is a non-toxic product, but with some dust.  Masks and gloves are proposed to use during operation.

     Electrical grade magnesium oxide should be stored in dry places, and are suggested to be used out within 12 months after delivery.