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Citation: Wei Yu, He Hui-Lan, Liu Xiao-Lin, Zheng Xue-Zhong. Inflence of Phase Transformation on the Morphology and Aggregation of Uniform Colloidal Particles[J]. Acta Physico-Chimica Sinica, ;1997, 13(06): 564-568. doi: 10.3866/PKU.WHXB19970616 shu

Inflence of Phase Transformation on the Morphology and Aggregation of Uniform Colloidal Particles

1.
Department of Chemistry,Hebei Normal Universtiy,Shijiazhuang 050016

Received Date: 16 September 1996
Available Online: 15 June 1997

The inflence of the additives, NaH2PO4 and 1-hydroxyethylidene-1,1'-diphosphonic acid (HEDP), the concentration of HNO3 and the temperature of reaction on the phase transformation and aggregation of Fe2O3 particles obtained by the boiling reflux of 0.2mol-1 Fe(NO3)3 solution has been studied using TEM and XRD. Phosphate gave monodispersed spindle-shaped α-Fe2O3 perticles used as magnetic recording material. Nanowhiskers of α-Fe2O3 was formed in the presence of HEDP and HNO3. The method is provisionally referred to as the inhibitory subcrystal aggregation method.
- Phase transformation,
- Uniform colloidal particle,
- Aggregation
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