**2.1 Preparation of the zirconium titanate powders**

The preparation of zirconium titanate powder from hydrolysis for alkoxides precursors, which was carried out separately, is illustrated in the block diagram reported in Figure 1. The synthesis performed with the mixture of alkoxides is described in Santos *et al*.

Fig. 1. Process of preparation of zirconium titanate powder from hydrolysis for alkoxides precursors.

#### **2.2 Characterization methods**

#### **2.2.1 Thermal analyses**

Thermogravimetric analyses (TGA) and thermodifferential analyses (DTA) of the powders were performed with an Harrop thermal analyzer, model STA 736, at a heating rate of 10 K⋅ min-1 in air, with a 10 L⋅min-1 flow.
