Recovery and reutilization of high-quality boron carbide from sapphire wafer grinding-waste

Li, Xin; Gao, Shuaibo; Xing, Pengfei; Dong, Kaizhao; Gao, Bo; Feng, Zhongbao

doi:10.1016/j.jenvman.2018.06.088

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…Therefore, it is only possible to effectively avoid transgranular fracture by adopting methods such as toughening of composite or nanofibers. And a large number of experimental studies have shown that the composite additive can effectively reduce the temperature and reaction pressure required for sintering, and can greatly increase the degree of densification of the boron carbide ceramic [10][11][12]. The hydrothermal method was initiated by geologists in the mid-19th century to simulate the mineralization of nature.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Al2O3-B4C Coated Composite Powder by Hydrothermal Method

Wang

et al. 2020

MSF

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Both alumina and boron carbide have good hardness and strength, and are widely used in production and life, industrial manufacturing, and military defense. However, due to the insufficiency of research at this stage and the lack of technical means, it is difficult to prepare alumina-boron carbide composite powder with good coating and ultra high strength through large-scale batch production. Therefore, this experiment wants to obtain a relatively good performance of coated Al2O3/B4C cermet by hydrothermal method through different experimental parameter ratios. Through the experimental results and analysis, the following conclusions are obtained. The most suitable concentration of aluminum nitrate is 0.1 mol/l. The low concentration affects the formation of alumina particles. The concentration is too high and prone to agglomeration. Through the optimization of hydrothermal synthesis concentration, a composite of Al2O3/B4C composite with good nanoencapsulated structure was obtained. The composite powder was pure in composition and high in specific surface area, which lays a foundation for solving the low-temperature preparation of high-density boron carbide ceramics.

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Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Al2O3-B4C Coated Composite Powder by Hydrothermal Method

Wang

et al. 2020

MSF

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“…27 Usually, TFT-LCD can undergo thermoalkaline treatment and the impurities like metal and metal oxides can be removed by acid washing. 28 However, the fabrication of silica-based mesoporous materials from TFT-LCD has received less attention. A previous study has indicated that a mesoporous aluminosilicate composite can be prepared from the TFT-LCD waste panel for an effective adsorption of heavy metal ions including Ni, Cu, and Zn.…”

Section: Introductionmentioning

confidence: 99%

“…TFT-LCD panel contains a high content of valuable material including glass, plastic and precious metals and different approaches for the recovery of glass from end-of-life liquid crystal display , such as zeolite and soda lime silicate glasses . Usually, TFT-LCD can undergo thermoalkaline treatment and the impurities like metal and metal oxides can be removed by acid washing . However, the fabrication of silica-based mesoporous materials from TFT-LCD has received less attention.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Recovery of Display Panel Waste Glass and Wastewater Boron by Chemical Oxo-precipitation with Fluidized-Bed Heterogeneous Crystallization

et al. 2019

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Silica-based carrier is a promising material for recovery of metal and nonmetal contaminants in chemical oxo-precipitation-fluidized bed crystallization (COP-FBC) system. Boron species are an essential element for plant growth and can cause health concerns in human beings at high concentrations in water environments. The composition of thin-film transistor liquid crystal display (TFT-LCD) contains a wide variety of metal oxides and can be tailored as promising functional mesoporous carriers for boron crystallization recovery in the presence of barium ions and hydrogen peroxide. In this study, waste-derived mesoporous aluminosilicate (MAS) nanomaterial in the presence of barium ions and hydrogen peroxide was used as a carrier for sustainable recovery of crystallized boron, a priority wastewaters pollutant. The MAS shows the hierarchically homogeneous distribution of nanostructured aluminosilicate particles with an average size of 12.8 ± 3.6 nm on the surface after the activation with Na 2 CO 3 at 1000 °C. Moreover, the negatively charged surface and the mesoporous structure of MAS enhance the adsorption of Ba 2+ onto MAS, and the Langmuir adsorption capacity of 105 mg/g is achieved, which is conducive to the enhancement of the recovery of boron species. Moreover, the recovery efficiency and crystallization ratio of boron by MAS can be up to 84.5 and 93.4%, respectively. The cross-sectional scanning electron microscopy images and the high-temperature X-ray diffraction results confirm the boron recovery mechanism that the negatively charged functional group as well as the mesoporosity of MAS triggers the rapid formation of needle-shaped precipitates of barium peroxoborate, and then converted to barium borate after calcination at 1050 °C. Results obtained in this study clearly demonstrate the possibility of fabricating environmentally benign mesoporous aluminosilicate adsorbents from TFT-LCD waste to sustainably recover and crystallize boron species from water and wastewater in COP-FBC.

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Reaction kinetics during non-isothermal solid-state synthesis of boron trioxide via boric acid dehydration

Kaur

Kainth

Kumar

et al. 2021

Reac Kinet Mech Cat

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Recovery and reutilization of high-quality boron carbide from sapphire wafer grinding-waste

Cited by 5 publications

References 25 publications

Preparation and Characterization of Al<sub>2</sub>O<sub>3</sub>-B<sub>4</sub>C Coated Composite Powder by Hydrothermal Method

Preparation and Characterization of Al<sub>2</sub>O<sub>3</sub>-B<sub>4</sub>C Coated Composite Powder by Hydrothermal Method

Simultaneous Recovery of Display Panel Waste Glass and Wastewater Boron by Chemical Oxo-precipitation with Fluidized-Bed Heterogeneous Crystallization

Reaction kinetics during non-isothermal solid-state synthesis of boron trioxide via boric acid dehydration

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