Deposition of hollow sphere In₂O₃ coatings by liquid flame spray

ABSTRACT

Hollow sphere In(OH)₃ coatings were deposited by a simple liquid flame spray with hollow sphere In(OH)₃ suspension, which was synthesized by improved soft template methods. The morphology of the In(OH)₃ was well preserved and oxygen vacancies were produced in the harsh thermomechanical environment of the flame spraying process. The In₂O₃ coatings and In₂O₃ powder were obtained by calcinating the In(OH)₃ coatings and In(OH)₃ precursor, respectively. The thickness of the coatings increased from 12 to 22 μm as the diameter of the feed nozzle increased, and the interconnection between the single hollow spheres In₂O₃ in the coatings was better than that of the as-synthesized In₂O₃ powder. The diameter of the single hollow spheres In₂O₃ in the coatings was about 1.2∼1.4 μm, which is similar to the as-synthesized In₂O₃ powder. The In₂O₃ coatings with hollow spheres possessed a very high specific surface area, excellent interconnections, controllable thickness and numerous oxygen defects.

KEYWORDS:

• In₂O₃ coatings
• In(OH)₃ suspension
• oxygen defects
• liquid flame spray
• hollow sphere

Disclosure statement

No potential conflict of interest was reported by the authors.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work is supported by National Key R&D Program of China under grant no. 2017YFE0115900, the Natural Science Foundation of China under grant no. 51872254 and Yangzhou Science Fund for Distinguished Young Scholars under grant no. YZ2017096.