Preparation and Immobilization of Ti-based Oxides by Detonation Method

doi:10.15541/jim20160576

Abstract

Abstract:

Ti-doped gel, prepared by hydrolysis of tetrabutyl titanate and ammonium nitrate solution, was mixed with hexogen to make mix explosive. The mix explosive was detonated in a closed kettle in cylindrical charge with presence of aluminum plate, and then Ti-based oxides were fabricated. The samples were characterized by XRD, TEM, EDX, and SEM. The results showed that samples contained FeTiO₃, a few of rutile, anatase, and Al₂O₃. The Ti-based oxides particles were spherical in micrometer level scale. Ti-based oxides were successfully immobilized on an aluminum plate driven by Ti-contained detonation wave, and the size of particles on the plate was 10 μm. The present results suggest that the detonation method provides an easy way to prepare Ti-based oxides and fabricate particle-plate structure for recycling materials synchronously.

Key words: detonation method, Ti-based oxides, particle-plate structure, immobilization

CLC Number:

O389

YAN Hong-Hao, ZHAO Tie-Jun, LI Xiao-Jie, WU Lin-Song. Preparation and Immobilization of Ti-based Oxides by Detonation Method[J]. Journal of Inorganic Materials, 2017, 32(6): 667-672.

Figures/Tables 7

Fig. 1 Schematic diagram of preparing Ti-doped gel precursor and Ti-based oxides powders

Fig. 2 Schematic of detonation reaction kettle①Extract opening; ② Top flange; ③ Connection of vacuum gauge; ④ Large flange; ⑤ Vessel cover; ⑥ mix explosive; ⑦ Air intake

Fig. 3 XRD patterns of samplesThe mass ratios of Ti-doped gel and RDX in S1 and S2 are 1.5:1, 1:1, respectively

Fig. 4 EDX pattern of samplesThe mass ratios of Ti-doped gel and RDX in S1 and S2 are 1.5:1, 1:1, respectively

Fig. 5 TEM images of samples(a) and (b) are from S1 and S2, respectively

Fig. 6 Aluminum plate morphologies after denotation reaction in preparation of S2(a) Aluminum plate after detonation reaction in reaction kettle; (b) A piece of aluminum plate for SEM characterization

Fig. 7 SEM images of TiO2 particles and particle-plate materials from sample S2(a): TiO2 particles; (b): Overall morphology of particle-plate; (c) and (d): Enlarged picture of local areas of particle-plate structure; (e): Morphology of corroded area on aluminum plate surface; (f): Element composition of area selected in Fig. (e)

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