High Pressure Synthesis and Preparation of Inorganic Materials

Liu, X.-Y.

doi:10.1016/b978-0-444-63591-4.00005-7

Cited by 7 publications

(5 citation statements)

References 216 publications

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“…These devices allow different upper-limit pressures and sample volumes. More details can be found elsewhere. , …”

Section: Synthesis Approaches For Antiperovskite Electrolytesmentioning

confidence: 99%

“…More details can be found elsewhere. 140,141 High-pressure synthesis has been tested as part of the efforts to explore the synthetic routes for metastable antiperovskite phases. For example, Li 3 OCl and Li 3 OBr phases have been reported as the major products from compressing mixtures of Li 2 O and LiCl or LiBr under a cubic anvil apparatus.…”

Section: High-pressure Synthesismentioning

confidence: 99%

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Antiperovskite Electrolytes for Solid-State Batteries

et al. 2022

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Solid-state batteries have fascinated the research community over the past decade, largely due to their improved safety properties and potential for high-energy density. Searching for fast ion conductors with sufficient electrochemical and chemical stabilities is at the heart of solid-state battery research and applications. Recently, significant progress has been made in solid-state electrolyte development. Sulfide-, oxide-, and halide-based electrolytes have been able to achieve high ionic conductivities of more than 10 −3 S/cm at room temperature, which are comparable to liquid-based electrolytes. However, their stability toward Li metal anodes poses significant challenges for these electrolytes. The existence of non-Li cations that can be reduced by Li metal in these electrolytes hinders the application of Li anode and therefore poses an obstacle toward achieving high-energy density. The finding of antiperovskites as ionic conductors in recent years has demonstrated a new and exciting solution. These materials, mainly constructed from Li (or Na), O, and Cl (or Br), are lightweight and electrochemically stable toward metallic Li and possess promising ionic conductivity. Because of the structural flexibility and tunability, antiperovskite electrolytes are excellent candidates for solid-state battery applications, and researchers are still exploring the relationship between their structure and ion diffusion behavior. Herein, the recent progress of antiperovskites for solid-state batteries is reviewed, and the strategies to tune the ionic conductivity by structural manipulation are summarized. Major challenges and future directions are discussed to facilitate the development of antiperovskite-based solid-state batteries.

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“…These devices allow different upper-limit pressures and sample volumes. More details can be found elsewhere. , …”

Section: Synthesis Approaches For Antiperovskite Electrolytesmentioning

confidence: 99%

Section: High-pressure Synthesismentioning

confidence: 99%

Antiperovskite Electrolytes for Solid-State Batteries

et al. 2022

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“…Though the influence of various parameters, such as pH, concentration of reactants, and so forth on the particle sizes and crystallinity, has been investigated previously, the influence of pressure is unknown yet. Pressure is known to have a significant influence on the structure and properties of nanoparticles. , The compounds with intermediate oxidation states can also be stabilized under high-pressure synthesis conditions . ZnO nanocrystals are also often prepared in hydrothermal reactors, which is a high-pressure reaction technique. , However, in all such studies, there is no information on the pressure parameter due to difficulty in measurement of pressure.…”

Section: Introductionmentioning

confidence: 99%

“…8,9 The compounds with intermediate oxidation states can also be stabilized under high-pressure synthesis conditions. 10 ZnO nanocrystals are also often prepared in hydrothermal reactors, which is a highpressure reaction technique. 11,12 However, in all such studies, there is no information on the pressure parameter due to difficulty in measurement of pressure.…”

Section: Introductionmentioning

confidence: 99%

In Situ Pressure Controlled Growth of ZnO Nanoparticles: Tailoring Sizes, Defects, and Optical Properties

2023

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ZnO, being an inexpensive, wide band gap semiconductor that possesses high mechanical, thermal, and chemical stabilities and suitable for a wide range of optical and electronic applications, is the preferred semiconductor of this era. In an effort to fully utilize its potential features, ZnO research is receiving increasing attention. This study investigates the influence of pressure on the crystallinity, defect density, size, and morphology of ZnO nanoparticles, synthesized using nonaqueous sol–gel method, and their respective impact on the optical properties. High-crystalline ZnO nanocrystals with a hexagonal wurtzite structure were synthesized at various pressures, including ambient pressure, 25, 37.5, 50, and 100 bars inside a high-pressure reactor. With the increase in pressure, a reduction in particle size was observed, reaching a minimum size (∼10 nm) at 50 bar pressure (ZnO-50). Further increase in pressure causes an enhancement in the particle size. This trend of size variation with pressure is attributed to a tradeoff between esterification and nucleation processes. Contrary to the expectation, smaller ZnO nanocrystals synthesized by the present method possess lesser number of defects, suggesting that high-pressure synthesis is a unique way that offers smaller ZnO nanocrystals of sub-10 nm sizes having high crystallinity and lesser defects in a shorter time span. Also, the optical transmittance of the systems could be greatly enhanced by carefully tuning the particle sizes, with ZnO-50 (∼10 nm particle size) having the highest transmittance (∼95% at 600 nm) among all samples. High crystallinity, uniform morphology, excellent visible transparency, wide band gap, and low defect density make these smaller ZnO nanocrystals a preferred choice for ultraviolet sensors and other optoelectronic devices.

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“…To realize the increase in both the cavity volume and cavity pressure, the structure and material of the pressure die must be studied. Hard carbide, the main material used to make high-pressure devices, can withstand high pressures, but its ability to withstand tensile and shear forces is poor [23,24]. The compressive strength of hard carbide can be significantly improved using the lateral principle, based on which researchers have designed various high-pressure dies [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

An Optimized Design Method and Experimental Study of Belt-Type Ultra-High-Pressure Dies

Shi,

Wang,

2023

Metals

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In this study, various structures are designed to improve the bearing capacity of belt-type ultra-high-pressure dies. Via theoretical analysis, numerical simulation, and destructive experiments, the stress distribution, bearing capacity, and failure principle of various dies are analyzed. The results demonstrate that the positive and negative values of the third invariant of the deviatoric stress tensor J3′ determine the deformation mode of the cylinder; when J3′ > 0, the cylinder is in the tensile deformation state, and when J3′ < 0, the cylinder is in the compressive deformation state. The third invariant of the deviatoric stress tensor of the belt-type cylinder is J3′ > 0, which causes tensile failure and rupture due to excessive circumferential stress. The use of a split cylinder can significantly reduce the circumferential stress, thus effectively reducing the maximum shear stress and von Mises stress and improving the pressure capacity of the cavity. However, when J3′ > 0 for the split cylinder, the pressure capacity is affected and the cylinder experiences tensile failure. A tangential split cylinder has a compressive deformation of J3′ < 0, which can fully utilize the properties of hard alloy materials and significantly improve the pressure-bearing capacity of the cylinder. This article provides an effective optimization design theory for belt-type dies, and the effectiveness of this method is proven through experiments.

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High Pressure Synthesis and Preparation of Inorganic Materials

Cited by 7 publications

References 216 publications

Antiperovskite Electrolytes for Solid-State Batteries

Antiperovskite Electrolytes for Solid-State Batteries

In Situ Pressure Controlled Growth of ZnO Nanoparticles: Tailoring Sizes, Defects, and Optical Properties

An Optimized Design Method and Experimental Study of Belt-Type Ultra-High-Pressure Dies

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