کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
791746 1466767 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of pure MgTiO3 by optimizing mixing/grinding condition of MgO + TiO2 powders
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Synthesis of pure MgTiO3 by optimizing mixing/grinding condition of MgO + TiO2 powders
چکیده انگلیسی

Through the dielectric materials used for the making of type I multilayer ceramic capacitors, the ilmenite magnesium titanate MgTiO3 is of particular importance. Yet, it seems difficult to get pure MgTiO3 with a controlled stoichiometry. In order to be able to synthesize it by solid-state reaction, we therefore studied the mixing/grinding behavior of the precursors MgO + TiO2.The evolution versus pH of the zeta potential values of both MgO and TiO2 (anatase) powders shows that it is impossible to get correct pH values allowing a good dispersion state and thus an easy control of the mixing of these two species when considering only electrostatic repulsion. So, we considered to add dispersing agent in order to get a steric dispersion behavior. Rheological characterization of the slurries showed that we were able to get a good dispersion state during the process of mixing/grinding. XRD and SEM/EDX analysis shows the ability of obtaining “pure” MgTiO3 with a controlled stoichiometry after calcination by controlling the rheological behavior of slurries during mixing/grinding.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 199, Issues 1–3, 1 April 2008, Pages 150–155
نویسندگان
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