and amorphous agglomerates, which is in accordance with the work of Rocha et al. (2004). Energy dispersive X-ray spectroscopy determined the mass ratio between magnesium and oxygen on the particle surfaces of the investigated samples (Table 1). The Mg: O value of the MgO suspension product is very similar to that of the hydroxide reference material, which indicates a predominance of Mg(OH)2 on the surface of the suspension particles. Therefore, thermogravimetric analysis (Fig. 4) was performed to examine this predominance and quantify the mass content of Mg(OH)2 within the suspension product. The TGA results show that the hydroxide content of the MgO suspension product exceeds that of the reference materials, which might be explained by processes with high conversion rates exceeding the purity of the Mg(OH)2 reference material. Taking into account the hydroxide content of the starting material, the conversion rate from MgO to Mg(OH)2 was determined as 99.2%. First, this high conversion rate was unexpected, but possible if one considers that hydration of up to 95% can be achieved, if Mg(OH)2 is already present prior to the
and amorphous agglomerates, which is in accordance with the work of Rocha et al. (2004). Energy dispersive X-ray spectroscopy determined the mass ratio between magnesium and oxygen on the particle surfaces of the investigated samples (Table 1). The Mg: O value of the MgO suspension product is very similar to that of the hydroxide reference material, which indicates a predominance of Mg(OH)2 on the surface of the suspension particles. Therefore, thermogravimetric analysis (Fig. 4) was performed to examine this predominance and quantify the mass content of Mg(OH)2 within the suspension product. The TGA results show that the hydroxide content of the MgO suspension product exceeds that of the reference materials, which might be explained by processes with high conversion rates exceeding the purity of the Mg(OH)2 reference material. Taking into account the hydroxide content of the starting material, the conversion rate from MgO to Mg(OH)2 was determined as 99.2%. First, this high conversion rate was unexpected, but possible if one considers that hydration of up to 95% can be achieved, if Mg(OH)2 is already present prior to the
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