Citation: ZHANG Da-Cai, GUO Wang, HUANG Ji-Quan, CAO Yong-Ge. New Dispersants for the Preparation of Y₂O₃ Spherical Powders by Homogeneous Precipitation at High Temperature[J]. Chinese Journal of Structural Chemistry, ;2015, 34(9): 1328-1334. doi: 10.14102/j.cnki.0254-5861.2011-0722 shu

New Dispersants for the Preparation of Y₂O₃ Spherical Powders by Homogeneous Precipitation at High Temperature

1.
a Center for Advanced Materials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;
2.
b Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 18 March 2015
Available Online: 5 May 2015
Fund Project: This work was supported by the National Natural Science Foundation of China (91022035) (91022035)

Spherical monodispersed and submicron-sized Y₂O₃ powders were successfully synthesized through the urea homogeneous precipitation method adding PVA, PVP, or PVA and PVP compound (PVA/PVP) as the dispersant which generated no impurity phases after calcining. The productivity is up to 60% at 107±2℃ for 3.5 h in an oil bath. The structure, phase composition and evolution, morphology and specific surface area of Y₂O₃ precursor and the calcined powders were explored by means of XRD, TG/DTA, FTIR, SEM, TEM and Micropore analyzer (BET). The spherical particle size of the powders calcined at 900℃ for 2 h was 330~350 nm. In this study, 15.5 Wt.% PVA, 8.5 Wt.% PVP or the mixture of both is in favor of enhancing the dispersity of the products. Based on what we have already achieved, it is rather significant to advance this research.
- PVA,
- PVP,
- PVA/PVP,
- productivity
1. [1]
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