Domaines in a metal oxide matrix
A technology of regional structure and oxide, applied in the preparation of titanium oxide/hydroxide, aluminum oxide/hydroxide, silicon oxide, etc., can solve problems such as roughness of the substrate
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Embodiment 1
[0077] Example 1: Indium-tin oxide in a silica matrix
[0078] SiCl 4 Vaporize at about 200°C at a rate of 0.51 kg / h, and then combine with 3.8Nm 3 / hour of hydrogen, 16.4Nm 3 / hour of air and 1Nm 3 / hour of nitrogen is fed into the reactor together.
[0079] In addition, an aqueous solution of indium(III) chloride and tin(IV) chloride was passed through a two-component nozzle to obtain an aerosol composed of domain structure precursors, and a carrier gas (3Nm 3 / hour of nitrogen) into the reactor. The aqueous solution contains 10.98wt.% InCl 3 and 0.66wt.% SnCl 4 .
[0080] The homogeneously mixed gas-aerosol mixture flows into the reactor and burns at an adiabatic combustion temperature of about 1200°C with a residence time of about 50msec.
[0081] The residence time is calculated based on the volume factor of the mixture flowing through the equipment and the operating volume flow rate of the process gas at the adiabatic combustion temperature.
[0082] After the f...
Embodiment 2
[0084] Embodiment 2~4 is carried out by the method similar to embodiment 1. In Example 2 the same precursor as in Example 1 was used, but in other proportions. In Example 3 ferric chloride and zinc chloride in solution were used as domain precursors and silicon tetrachloride in vapor form was used as matrix precursor. In Example 4 the three domain precursors, ie the chlorides of iron, zinc and nickel, were used in solution, and titanium tetrachloride as matrix precursor was used in vapor form. In Example 5, zinc nitrate and palladium nitrate were used as the domain structure matrix, while aluminum nitrate was used as the matrix matrix in the form of an aqueous solution, and was changed into an aerosol by ultrasonic atomization, and introduced into the reactor through the carrier gas. Example 6 was carried out in a manner similar to that of Example 5. In Example 6, cerium(III) nitrate and palladium nitrate were used as domain precursors, and zirconyl nitrate was used as a mat...
Embodiment 3
[0094] The TEM photograph of the powder of Example 3 shows an amorphous silica matrix embedded with iron-zinc oxide crystals with a crystallite size of 5-30 nm (Fig. 4). Energy Dispersive X-ray Analysis (EDX)
[0095] The EDX spectrum of the powder of Example 1 shows that the black crystals contain only indium and tin atoms.
[0096] FIG. 5A is the EDX spectrum of the domain structure in Example 1. FIG. The atomic mass ratio of indium / tin varies from 94.6:5.4 to the corresponding oxide mass ratio of indium oxide / tin oxide of 94.3:5.7. This is in good agreement with the overall value of 94.0:6.0 obtained by X-ray fluorescence analysis of indium oxide / tin oxide.
[0097] FIG. 5B is the EDX spectrum of another domain structure in Example 1. FIG. The atomic mass ratio of indium / tin is 99.5:0.5, indicating that the structural composition of this region is almost entirely indium oxide.
[0098] Figure 6 is the EDX spectrum of the powder in Example 3.
[0099] X-ray diffraction ...
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