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Updated: May 28, 2026

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles

Published on: October 27, 2018

Fluoride-conversion synthesis of homogeneous actinide oxide solid solutions.

G W Chinthaka Silva¹, John D Hunn, Charles Yeamans

¹Harry Reid Center for Environmental Studies, University of Nevada, Las Vegas, Box 454009, 4505 Maryland Parkway, Las Vegas, Nevada 89154, USA. silvagw@ornl.gov

Inorganic Chemistry

|October 15, 2011

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A novel low-temperature synthesis method yields highly crystalline and homogeneous uranium-thorium oxide (U,Th)O(2) solid solutions. This technique is effective for producing materials with varying thorium dioxide (ThO(2)) content.

Area of Science:

Materials Science
Nuclear Chemistry
Solid-State Chemistry

Background:

Uranium-thorium oxide ((U,Th)O(2)) solid solutions are crucial nuclear materials.
Conventional synthesis methods often require high temperatures, limiting control over homogeneity and crystallinity.

Purpose of the Study:

To develop a new, lower-temperature method for synthesizing (U,Th)O(2) solid solutions.
To investigate the structural properties of the synthesized solid solutions.

Main Methods:

Reacting separate actinide oxides with ammonium hydrogen fluoride to form ammonium actinide fluorides.
Converting the fluorides to oxide solid solutions via a two-phase process involving heating in air and argon.

Main Results:

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Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles

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Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate

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Published on: February 23, 2016

Successful synthesis of (U,Th)O(2) solid solutions with 10-90 wt% ThO(2) at 1100 °C.
Microscopic analysis confirmed high crystallinity and nanoscale homogeneity of the synthesized materials.

Conclusions:

The new technique enables efficient synthesis of high-quality (U,Th)O(2) solid solutions at relatively low temperatures.
This method offers a promising route for producing advanced nuclear fuel materials with tailored properties.