Shock synthesis of nanocrystalline La2Ti2O7 powder

Ran, Haotian; Zhou, Qiang; Chen, Pengwan; Liu, Jing; Sekine, Toshimori; Gao, Xin

doi:10.1063/5.0051778

Cited by 3 publications

(6 citation statements)

References 40 publications

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“…Furthermore, the quasi-spherical morphology indicates the formation process in which the melted In 2 V 2 O 7 at a high pressure and high temperature cools down immediately and nucleates to form In 2 V 2 O 7 nanoparticles. It is also reported in previous investigation on the shock synthesis of materials …”

Section: Resultssupporting

confidence: 72%

“…The shock pressure values were calculated based on the impedance match method. The detailed calculation process has been explained in and . The corresponding experimental parameters and calculated results are listed in Table .…”

Section: Methodsmentioning

confidence: 99%

“…Shock compression technology features a high dynamic pressure, high temperature, high quenching rate, etc . Thus, it is utilized to process materials with large volume compared with static compression technology.…”

Section: Introductionmentioning

confidence: 99%

“…Shock compression technology features a high dynamic pressure, high temperature, high quenching rate, etc. 36 Thus, it is utilized to process materials with large volume compared with static compression technology. Through this technology, the shockwave acts on a target material to generate ultrahigh pressures (10 0 −10 2 GPa) and temperatures (10 2 −10 4 K) in microseconds, inducing multiple physical and chemical phenomena.…”

Section: ■ Introductionmentioning

confidence: 99%

“…46 With respect to this method, several techniques have been developed to adjust the pressure and temperature during shock compression for the synthesis of materials, such as organic molecules using inorganic precursors, 47 nanodiamonds, 48 doped TiO 2 , 49 and doped graphene. 43 Recently, a shockinduced chemical reaction has been applied to prepare bimetal oxide materials, such as Gd 2 Zr 2 O 7 , 50 La 2 Ti 2 O 7 , 36 etc.…”

Section: ■ Introductionmentioning

confidence: 99%

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Formation of Novel Bimetal Oxide In₂V₂O₇ through a Shock Compression Method

Gao

Ran²,

Zhou³

et al. 2022

ACS Omega

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Bimetal oxides with a chemical formula of A 2 B 2 O 7 have received much attention from plenty of research groups owing to their outstanding properties, such as electronic, optical, and magnetic properties. Among the abundant element combinations of cations A and B, some theoretically predicted compounds have not successfully been synthesized in experiments, such as In 2 Zr 2 O 7 , In 2 V 2 O 7 , etc. In this study, a novel tetragonal pyrochlore-like In 2 V 2 O 7 nanopowder has been reported for the first time. In 2 O 3 and VO 2 powders mixed through ball milling were reacted to form In 2 V 2 O 7 by shockwave loading. The recovered sample is investigated to be nanocrystalline In 2 V 2 O 7 powder through various techniques, such as X-ray diffraction, scanning electron microscopy, X-ray energy spectrum analysis, and transmission electron microscopy. The formed In 2 V 2 O 7 is indexed as a tetragonal cell with a = b = 0.7417 nm and c = 2.1035 nm. Moreover, the formation mechanism of In 2 V 2 O 7 through a shock synthesis process is carefully analyzed based on basic laws of shockwave. The experimental results also confirm that a high shock temperature and high shock pressure are the two key factors to synthesize the In 2 V 2 O 7 nanopowder. Our investigation demonstrates the high potential application of a shock-induced reaction on the synthesis of novel materials, including the preparation of new bimetal oxides.

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Section: Resultssupporting

confidence: 72%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%