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Multicolored Nanosized Iron Oxide

There are two kinds of trans-iron oxide pigment, such as red (α-Fe2O3) and yellow (α-FeOOH). The medium color area between red and yellow could be derived by both intermediates of course. However, greenish-colored iron oxide particle cannot be derived from practical synthesis. Green pigments are often prepared by physical mixing of yellow pigments such as iron oxide yellow and blue pigments such as organic phthalocyanine blue and inorganic ultramarine blue. When organic and inorganic pigments are mixed, a paint flooding occurs because of density difference. In some cases, paint dispersion is unstable because both surface properties are different. In terms of preparation of trans-iron oxide green, we have found it is possible to prepare transgreen particles by organic blue coating onto trans-iron oxide yellow particles. For example, previous methods were suggested as follows: lead chromate pigment including heavy metal and phthalocyanine blue would be coprecipitated, or organic blue pigments would be adhered onto inorganic pigments. It was found that phthalocyanine coating onto trans-iron oxide yellow particle surface by using gluing additives to derive composite transgreen particles. TEM photograph of transgreen particles, where phthalocyanine blue is coated onto the surface of trans-iron oxide yellow particles. The physically mixed particles, trans-iron oxide yellow particles and phthalocyanine blue particles. If you are looking for high quality, high purity and cost-effective Iron oxide, or if you require the latest price of Iron oxide, please feel free to email contact mis-asia.

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