Unveiling phase evolution of complex oxides toward precise solid-state synthesis.

Area of Science:

• Solid-state chemistry
• Materials science
• Inorganic synthesis

Background:

• Precise synthesis of high-purity complex inorganic materials is vital for advancing materials discovery.
• Challenges exist due to limited theoretical understanding and practical guidance for complex compositions and structures.

Purpose of the Study:

• To propose and validate a feasible principle for synthesizing complex inorganic solids with high purity.
• To address the need for improved methods in exploratory solid-state synthesis.

Main Methods:

• Introduction of an 'inducer' to guide synthesis pathways via crucial intermediates.
• Utilizing structural templating, termed inducer-facilitated assembly through structural templating (i-FAST).
• Validation using three distinct complex oxides: garnet, perovskite, and pyrochlore.

Main Results:

• Demonstrated successful synthesis of high-purity complex oxides using the i-FAST principle.
• Showcased how structural templating guides synthesis along predesigned pathways.
• Highlighted the formation of thermodynamically favored and kinetically preferred intermediates.

Conclusions:

• The i-FAST principle offers a robust strategy for precise synthesis of complex inorganic solids.
• This advancement deepens the understanding of thermodynamics, kinetics, and phase evolution in solid synthesis.
• Provides an effective approach for guiding exploratory solid-state synthesis.