DTA/TG Study of the Interaction in the Nickel Nitrate Hexahydrate–Hexamethylentetramine System

A. S. Arzumanyan; Арзуманян А. С.; N. G. Amirkhanyan; Амирханян Н. Г.; E. G. Grigoryan; Григорян Е. Г.; S. L. Kharatyan; Харатян С. Л.

doi:10.31857/S0207401X23020036

DTA/TG Study of the Interaction in the Nickel Nitrate Hexahydrate–Hexamethylentetramine System

Authors: Arzumanyan A.S.¹, Amirkhanyan N.G.¹, Grigoryan E.G.¹, Kharatyan S.L.¹
Affiliations:
1. Nalbandyan Institute of Chemical Physics, National Academy of Sciences of the Republic of Armenia, 0014, Yerevan, Republic of Armenia
Issue: Vol 42, No 2 (2023)
Pages: 60-65
Section: ФИЗИЧЕСКИЕ МЕТОДЫ ИССЛЕДОВАНИЯ ХИМИЧЕСКИХ РЕАКЦИЙ
URL: https://ruspoj.com/0207-401X/article/view/674902
DOI: https://doi.org/10.31857/S0207401X23020036
EDN: https://elibrary.ru/IWHXEM
ID: 674902

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Abstract

This paper presents the results of DTA/TG studies of one of the most popular systems in solution combustion synthesis (SCS) nickel nitrate hexahydrate (Ni(NO3)2⋅6H2O)–hexamethylenetetramine (C6H12N4). X‑ray diffraction and EDS-assisted SEM are used for characterizing the reaction products. The specified system is studied in the form of a powder mixture, a gel obtained by dissolving the initial reagents in distilled water, and the same gel, heat treated at 100°C. It is established that the formation of metallic nickel is possible only if the mixture of reagents is first transferred to the gel state. The values of the effective activation energies of the formation of NiO and metallic nickel are calculated, and the features of the course of interactions depending on the method of preparation of the studied samples are presented.

Keywords

solution combustion synthesis, DTA, TG, DTG, XPA methods, nickel nitrate hexahydrate, hexamethylenetetramine

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