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Synthesis of Hematite Pigments (alpha-Fe2O3) by Thermal Transformations of FeOOH by Lilik Miftahul Khoiroh; Brawijaya University; Diah Mardiana; Akhmad Sabarudin; Bambang Ismuyanto; Brawijaya University; Brawijaya University; Brawijaya University is a Environmental Science article available to read on EtoBox.

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Synthesis of iron oxide FeOOH from FeCl 3 , followed by thermal transformation to form red hematite was conducted. The effect of pH and temperature calcinations was studied. The observed parameters were include crystal structure, grain size, color, particle size distribution, and morphology. The result showed that α-Fe 2 O 3 structure with relatively pure and good crystallinity were found at all designated synthesis condition. The highest degrees of redness and chroma, uniformity of morphology and particle size distribution were achieved at pH 6, while the lowest degrees was formed at pH 8. The pigment at pH 6 has spherical-like shape with an average size of 0.16±0.057 μm. Instead, at pH 8 has spherical-like and cubic-like shape with an average grain size of 0.17±0.051 μm. The highest degrees of brightness, redness, yellowness and the highest chroma as well as smallest grain size of 0.15±0.052 μm were achieved at 800 o C but at this temperature the crystal orientation of 006 was not appear and the presence of 2θ angle (63.99 o ) were supposed as crystal defects and impurity.

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Author

Lilik Miftahul Khoiroh; Brawijaya University; Diah Mardiana; Akhmad Sabarudin; Bambang Ismuyanto; Brawijaya University; Brawijaya University; Brawijaya University

Publisher

Brawijaya University

Published

2013

Language

EN

Field

Environmental Science (Physical Sciences)