A New Type of Precursors for Gas Phase Deposition of Nanostructured Coatings

IF 1.2 4区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Structural Chemistry Pub Date : 2024-12-02 DOI:10.1134/S0022476624110039

I. K. Igumenov, V. V. Lukashov, K. A. Kovalenko, M. M. Syrokvashin, P. E. Plyusnin, A. V. Ishchenko, R. A. Shutilov

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Abstract

A synthesis procedure for composite precursors of the composition yttrium-stabilized zirconia nanoparticles – 2,2,6,6-tetramethyl-3,5-heptandionato-hafnium(IV) is developed. The thermal behavior of the synthesized composites is studied by the complex thermal analysis up to 600 °C in a wide concentration range. Main components of thermolysis products are determined by the energy-dispersive X-ray (EDX) analysis. Features are revealed in TG curves for all compositions in the temperature range of 310-410 °C. From the IR, XPS, and EDX data it is found that the observed effects are due to low-temperature decomposition of a small part of the volatile metal-organic precursor irreversibly absorbed on the surface of nanoparticles. A hypothesis is put forward that irreversible adsorption is caused by Lewis acid centers on the surface of nanoparticles. The obtained information about the thermal properties of composite precursorscan facilitate the development of methods to control nanoparticle concentrations in the coating formed.

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一种新型气相沉积纳米结构涂层前驱体

研究了钇稳定氧化锆纳米颗粒- 2,2,6,6-四甲基-3,5-庚二钠-铪（IV）复合前驱体的合成方法。通过复杂的热分析，研究了复合材料在600℃范围内的热行为。通过能量色散x射线（EDX）分析确定了热裂解产物的主要成分。在310 ~ 410℃的温度范围内，所有组分的热重曲线都显示出特征。从红外、XPS和EDX数据中发现，所观察到的效应是由于低温分解了一小部分挥发性金属有机前驱体，这些金属有机前驱体不可逆地吸收在纳米颗粒表面。提出了纳米颗粒表面的Lewis酸中心引起不可逆吸附的假设。所获得的关于复合前驱体热性能的信息有助于开发控制所形成涂层中纳米颗粒浓度的方法。

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来源期刊

Journal of Structural Chemistry 化学-无机化学与核化学

CiteScore

1.60

自引率

12.50%

发文量

142

审稿时长

8.3 months

期刊介绍： Journal is an interdisciplinary publication covering all aspects of structural chemistry, including the theory of molecular structure and chemical bond; the use of physical methods to study the electronic and spatial structure of chemical species; structural features of liquids, solutions, surfaces, supramolecular systems, nano- and solid materials; and the crystal structure of solids.