Abstract

The dependence of the apparent density and electrical conductivity of two manganese dioxide powders on the amount of admixed very fine (< 5 μm) material have been investigated. In general, even a small amount of fine particles results in considerable changes. At low pressure (10 MPa ⋍ 100 bar), the powder density shows a maximum; at high pressure (1250 MPa) a monotonic increase is observed. The specific powder resistivity rises monotonically at low pressure with increasing amount of fine particles. At high pressure, it rises (NMD) or shows a minimum (CMD).

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