Presence of magnesium-alumina spinel in forsterite ceramics and its influence during sintering and on resulting properties of fired body

25th International Conference and Meeting of Departments, CONSTRUMAT 2019

Nguyen, M.^1 ; Sokolá, R.^1

Brno University of Technology, Faculty of Civil Engineering, Institute of Technology of Building Materials and Components, Veveí 331/95, Brno

602 00, Czech Republic^1

关键词: Ceramic-metal joints;    Coefficient of linear thermal expansion;    Dilatometric analysis;    Electrotechnical engineering;    Forsterite ceramics;    Mineralogical compositions;    Raw materials mixtures;    Stoichiometric ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/549/1/012025/pdf
DOI  :  10.1088/1757-899X/549/1/012025

来源: IOP

【 摘 要 】

The main objective of this paper is to describe the creation and behaviour of magnesium-alumina spinel (MA-spinel) phase from raw materials mixtures in forsterite refractory and its influence on resulting physical properties and mineralogical composition of fired body. Forsterite ceramics is mostly used for its high refractoriness as a refractory material in kilns and furnaces and also in electrotechnical engineering for its high coefficient of linear thermal expansion for ceramic-metal joints. Currently, forsterite is not produced in the Czech Republic. The primary objective is to synthesize forsterite ceramics via solid-state reaction utilizing various raw materials used in industry with stoichiometric ratio of forsterite. The resulting properties of fired body will be determined using X-ray diffraction analysis for mineralogical composition, thermal dilatometric analysis and vacuum water absorption method for physical properties of fired body and refractoriness of pyrometric cones will be conducted.