SINTERING BEHAVIOUR OF MAGNESIUM OXIDE OBTAINED FROM SEAWATER DOPED WITH NANO-TiO2 | Zendy

Jelena Jakić | Zendy; Miroslav Labor | Zendy; Vanja Martinac | Zendy; Martina Perić | Zendy

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SINTERING BEHAVIOUR OF MAGNESIUM OXIDE OBTAINED FROM SEAWATER DOPED WITH NANO-TiO2

Author(s) -

Jelena Jakić,

Miroslav Labor,

Vanja Martinac,

Martina Perić

Publication year - 2021

Publication title -

materiali in tehnologije

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.27

H-Index - 25

eISSN - 1580-3414

pISSN - 1580-2949

DOI - 10.17222/mit.2019.248

Subject(s) - materials science , periclase , sintering , microstructure , seawater , magnesium , porosity , precipitation , metallurgy , grain boundary , oxide , chemical engineering , composite material , oceanography , physics , meteorology , engineering , geology

In order to improve the properties of sintered MgO (80 % precipitation) obtained from seawater, an investigation was carried out with (0, 1, 2) w/% of nano-TiO2 and micro-TiO2 additions during sintering at a temperature of 1500 °C (1 h and 2 h). The effects of the TiO2 addition on its microstructural properties, density, porosity and chemical composition after sintering were observed. The SEM/EDS analysis confirmed the formation of a homogeneous microstructure composed mainly of periclase grains and well-distributed secondary phases. CaTiO3 and MgTiO4 are predominantly located at the inter- and intra-periclase grain boundary surfaces during cooling. The microstructure of the MgO samples with the addition of nano-TiO2 become more compact, having a positive impact on the porosity and density of the samples. The addition of 1 w/% of nTiO2 represents the optimal amount for the improvement of the properties of the MgO samples (80 % precipitation) obtained from seawater.

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