Synthesis of yttria nanopowder with poly acrylic acid as dispersant for highly transparent yttria ceramics

Synthesis of yttria nanopowder with poly acrylic acid as dispersant for highly transparent yttria ceramics

Highly pure and well-dispersed yttria nanocrystalline powders were synthesized with a modified coprecipitation method that uses mixed ammonium hydroxide-carbonate solution as the precipitant and poly acrylic acid (PAA) as the dispersant. Comparing with the yttria powders synthesized using the same r...

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Bibliographic Details
Main Authors: Ni, Meng, Wang, Jun, Ma, Jie, Yao, Bingqing, Ong, Boon Chong, Dong, Zhili, Tang, Dingyuan
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2021
Subjects:
Engineering::Electrical and electronic engineering
Coprecipitation
Transparent Ceramics
Online Access:https://hdl.handle.net/10356/154368
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Institution: Nanyang Technological University
Language: English
Description
Summary:Highly pure and well-dispersed yttria nanocrystalline powders were synthesized with a modified coprecipitation method that uses mixed ammonium hydroxide-carbonate solution as the precipitant and poly acrylic acid (PAA) as the dispersant. Comparing with the yttria powders synthesized using the same route but without PAA dispersant, the PAA-assisted powders exhibit lower level of agglomeration and better sinterability. Sintering trajectories of the powders with and without PAA dispersant were investigated. Y2O3 ceramics sintered with the PAA-assisted powders exhibited smaller grain size, homogeneous microstructure, and higher in-line optical transmittance. The result suggests that the polymer-assisted coprecipitation could be used to synthesize yttria nanopowders for fabricating high optical quality transparent ceramics.

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