Guoyu Qian

Institute of Process Engineering

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Zhi Wang

Wuhan National Laboratory for Optoelectronics

Xuzhong Gong

Institute of Process Engineering

Junhao Liu

South China University of Technology

Guoguang Cheng

University of Science and Technology Beijing

Sheng Pang

China University of Petroleum, East China

Sheng Pang

Institute of Biophysics

Dong Wang

Beijing National Laboratory for Molecular Sciences

Wenhui Ma

Kunming University of Science and Technology

Yiwei Sun

Zhejiang University of Technology

Jianwei Cao

Northwestern Polytechnical University

Cooperative Institutions

Chinese Academy of Sciences

Institute of Process Engineering

University of Chinese Academy of Sciences

University of Science and Technology Beijing

Kunming University of Science and Technology

Tsinghua University

Tianjin University

Zhejiang University

University of Science and Technology of China

Harbin Institute of Technology

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Inducible regulation of spherical CaO particle for the recycling of carbide slag

Powder Technology (2019)

Junqiang Zhang Xuzhong Gong Zhi Wang Junhao Liu Yanguang Chen

Slag (welding)

Particle (ecology)

10.1016/j.powtec.2019.12.030

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Citations (6)

Millisecond Conversion of Photovoltaic Silicon Waste to Binder‐Free High Silicon Content Nanowires Electrodes (Adv. Energy Mater. 40/2021)

Advanced Energy Materials (2021)

Jijun Lu Siliang Liu Junhao Liu Guoyu Qian Dong Wang

Waste to Electrodes In article number 2102103, Junhao Liu, Yanan Chen, Zhi Wang and co-workers propose an electrothermal shock method that directly converts photovoltaic silicon waste to Si nanowire (SiNW) electrodes in milliseconds. The SiNW electrode has a Si content of 76% and exhibits an ultrahigh initial Coulombic efficiency (89.5%) and stable half/full cell cycle performance. Successful application of this method opens a new pathway for promotion of sustainable development of renewable energy.

Millisecond

Silicon nanowires

10.1002/aenm.202170157

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Partition model for trace elements between liquid metal and silicate melts involving the interfacial transition structure: An exploratory two-phase first-principles molecular dynamics study

Journal of Molecular Liquids (2022)

Yiwei Sun Guoyu Qian Sheng Pang Jijun Lu Jianwei Guo

Trace element

TRACE (psycholinguistics)

10.1016/j.molliq.2022.120048

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Citations (5)

Ultrafast pressureless sintering of high conductivity Ni-based cermets inert anode for Carbon-free electrolytic aluminum

Journal of Alloys and Compounds (2024)

Yuyao Chen Guoyu Qian Jijun Lu Sheng Pang Yiwei Sun

Cermet

Inert

10.1016/j.jallcom.2024.175463

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Citations (2)

A green method to separate different layers in photovoltaic modules by using DMPU as a separation agent

Solar Energy Materials and Solar Cells (2022)

Ke Li Zhi Wang Changming Liu Dong Wang Guobiao Li

10.1016/j.solmat.2022.111870

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Citations (26)

Effect of Cr₂O₃ on the properties of stainless steel refining slags and desulfurization

Metallurgical Research & Technology (2016)

Liuyi Li Guoguang Cheng Bin Hu Cheng-shun Wang Guoyu Qian

In order to be able to understand the effect of residual Cr2O3 (0–1.5%) on properties of stainless steel refining slag and desulfurization, the melting temperature and apparent viscosity were measured in the temperature range of 1300 °C to 1500 °C. The results showed that the melting temperature, apparent viscosity and activation energy of viscous flow gradually rise w ith the increase of Cr2O3 content, and that present a larger increase for the slags with bigger basicity. When the basicity of slag is 1.5, melting temperature increases by 50 °C and apparent viscosity increase by 0.1 Pa.s with the increase of Cr2O3 content from 0 to 1.5%. But melting temperature and apparent viscosity rise by 100 °C and 0.2 Pa.s for the slags with basicity 1.7, respectively. The small amounts of Cr2O3 in stainless steel refining slag can reduce the liquidity of slag by inducing the precipitate of CaO.Cr2O3 with high melting point, which has a negative effect on the desulfurization.

Refining (metallurgy)

Slag (welding)

Liquid steel

Atmospheric temperature range

Ladle

10.1051/metal/2016044

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Citations (6)

Removal of Phosphorus in Silicon by the Formation of CaAl2Si2 Phase at the Solidification Interface

Metallurgical and Materials Transactions B (2016)

Liyuan Sun Zhi Wang Hang Chen Dong Wang Guoyu Qian

Directional solidification

10.1007/s11663-016-0848-x

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Citations (17)

Reoxidation of Al-Killed Molten Steel by Fe₂O₃and Cr₂O₃in the Magnesia-Chromite Refractory

steel research international (2013)

Fang Jiang Guoguang Cheng You Xie Guoyu Qian Qixuan Rui

In the present work, the reoxidation of Al-killed molten steel from the magnesia-chromite refractory was investigated. Firstly, the composition and the phases of magnesia-chromite bricks from three different steelmaking shops were analyzed. Secondly, the magnesia-chromite bricks were immersed in Al-killed molten steel for a determined time to observe the reaction mechanism. Finally, the reoxidation of Al-killed molten steel by the magnesia-chromite bricks was evaluated based on a comparison with the pure magnesia crucibles. The XRF showed the Fe2O3 content of the magnesia-chromite bricks is about 6 mass%, and the Cr2O3 content is in a range of 13–19 mass%. The XRD pattern showed the phases in the bricks are mainly MgO and (Mg,Fe)(Cr,Al,Fe)2O4. The fracture surface of magnesia-chromite bricks after immersion in Al-killed molten steel indicated that there exists a reacted layer, and the reacted layer formed after immersion in the low Cr steel is more obvious than that formed after immersion in the high Cr steel. The SEM–EDS of magnesia-chromite bricks showed that (Mg,Fe)(Cr,Al,Fe)2O4 in the reacted layer decreased after immersion in Al-killed molten steel, especially in the low Cr molten steel. Compared with steel melted in pure magnesia crucibles, the total oxygen of steel melt in magnesia-chromite crucibles showed a lower decreasing rate, and the rate of Cr increase and Al loss were much larger, especially in the low Cr molten steel.

Chromite

10.1002/srin.201200311

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Citations (3)

The Effect of Na2O on the Removal of Boron and Phosphorus from Silicon Using CaO-SiO2 Flux

2016-Sustainable Industrial Processing Summit (2016)

Guoyu Qian Zhi Wang Jianwei Cao Qingchao Zhao Xuzhong Gong

Interface mass-transfer dynamics control and thermodynamics restriction of interphase distribution coefficient are the common problems in the process of producing high-purity silicon at present, especially for low concentration impurities B and P with high harmfulness. Traditional metallurgical purification method is difficult to remove impurities B and P simultaneously, which can lead to low efficiency and high energy consumption problem. Flux treatment can be efficient to remove B from silicon, but not for P due to the weaken ability to combine with oxygen. In order to efficiently remove P under the condition of slagging remove B, the addition of Na2O into slags were carried out to improve the oxidizability of slag for the simultaneous removal of B and P. Metallurgical grade silicon was subjected to refining by liquid CaO-SiO2-(Na2O) slags at 1823K(1550iae). The removal efficiency of B and P was examined under a range of slag compositions with different amount of Na2O. The results showed that the removal efficiency of B and P increased with the addition of Na2O to slags. For the slag without Na2O, the removal efficiency of B and P were 40% and 57%, respectively. When the Na2O in slag increased to 30%, the removal efficiency of B and P increased to 85% and 67%, respectively. A thermodynamic evaluation of the slags system showed that the addition of Na2O led to a substantial increase of free oxygen ion activity and oxygen partial pressure, which enhanced the removal of impurity B and P.

Slag (welding)

Refining (metallurgy)

Mass transfer coefficient

Source

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Citations (0)

Recycling of solar cells from photovoltaic modules via an environmentally friendly and controllable swelling process by using dibasic ester

Clean Technologies and Environmental Policy (2023)

Ke Li Dong Wang Kaibo Hu Changming Liu Zhi Wang

Environmentally Friendly

10.1007/s10098-023-02496-1

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Citations (20)