engleski

Synthesis of Forsterite Powder from Zeolite Precursors

Powder mixture of NH4-exchanged zeolite A and MgO, and powder mixture of NH4-exchanged mordenite and MgO were used as starting materials in the synthesis of crystalline ceramic materials. Conventional ball milling was applied in order to amorphise NH4-exchanged zeolites, to reduce the particle size of MgO, and produce a homogeneous mixture. Solid-state transformation of the mixtures after heating at temperature of their phase transformations in the interval 800oC-1000oC for 3h yielded crystalline forsterite (Mg2SiO4) with possibly minor amounts of sapphirine (Mg4Al10Si2O23) in the first case, and to crystalline forsterite (Mg2SiO4) with traces of enstatite (MgSiO3) in the second case.

ceramics; forsterite; zeolite precursor; high energy ball-milling; solid state transformation

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