Article
Chemistry, Applied
Jiangyue Su, Ran Pang, Haiyan Wu, Shangwei Wang, Tao Tan, Weihong Yuan, Su Zhang, Lihong Jiang, Da Li, Chengyu Li, Hongjie Zhang
Summary: A series of novel red-emitting BaLiZn3(BO3)(3):Eu3+ phosphors were synthesized and systematically investigated. The phosphors can be excited by near ultraviolet and blue light to emit red light. The optimal doping concentration is 3 mol% and the phosphors exhibit good thermal stability.
JOURNAL OF RARE EARTHS
(2022)
Article
Materials Science, Ceramics
Chunlai Zhang, Chunmei Yao
Summary: A series of Sr9Y(PO4)(7):Eu3+ and Sr9Y(PO4)(7):Eu3+, Gd3+ red-emitting phosphors were successfully prepared via a high-temperature solid-state method, with Gd3+ co-doping significantly improving the luminescence intensity, suitable for w-LED applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Applied
Ka Ding, A. Siru, Shuo Pang, Leyan Shan, Yaqi Zhang, Pengfei Sun, Bin Deng, Ruijin Yu
Summary: A novel red-emitting phosphor tantalate Ca2YTaO6:Eu3+ was synthesized with high color purity and thermal stability, showing potential applications in white light-emitting diodes (w-LEDs).
JOURNAL OF RARE EARTHS
(2021)
Article
Materials Science, Multidisciplinary
Pratik D. Baheti, Rupesh A. Talewar, S. V. Moharil
Summary: This study investigates a phosphor converted white LED using a yellow and red emitting material. K2SiF6:Mn4+ is prepared as the red emitting phosphor using a wet chemical technique. A white LED is fabricated using a blue InGaN LED chip coated with Y3Al5O12:Ce3+ and K2SiF6:Mn4+ phosphor. The effects of K2SiF6:Mn4+ as the red emitting material in combination with the blue InGaN LED chip and Y3Al5O12:Ce3+ phosphor are also studied. The resulting white LED shows a CIE value of (x=0.31, y=0.33) and a CRI of 78.1.
Article
Materials Science, Multidisciplinary
Zhengqiang Liu, Zebin Li, Takatoshi Seto, Yuhua Wang
Summary: By adopting ion substitution engineering, an ultra-broadband yellow-emitting phosphor excited by near-ultraviolet (NUV) was successfully obtained. The white light-emitting diode (WLED) device fabricated with this yellow phosphor exhibits super-high color rendering index and appropriate correlated color temperature, indicating its great potential for application in NUV-excited white LEDs.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Xiaoxue Huo, Zhijun Wang, Chunjing Tao, Nan Zhang, Dawei Wang, Jinxin Zhao, Zhiping Yang, Panlai Li
Summary: A series of Tb3+, Eu3+, Tm3+ doped Mg2Y2Al2Si2O12(MYAS) phosphors were synthesized by high temperature solid-state method. The emission spectra and energy transfer between the lanthanide ions in the materials were studied in detail.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Xue Huang, Wentao Zhang, Xiaomeng Wang, Jiyong Zhang, Xi Gao, Haiying Du
Summary: The novel CaLa4Ti4O15:Eu3+ red-emitting phosphor, co-doped with Gd3+, shows enhanced luminescence performance through energy transfer and co-doping. It can be used as an excellent red component for w-LEDs and plant lighting applications, achieving appropriate color temperature and high color rendering index.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Wanggui Ye, Chong Zhao, Xiaofei Shen, Chaoyang Ma, Zhonghua Deng, Yanbin Li, Yuzhen Wang, Chuandong Zuo, Zicheng Wen, Yingkui Li, Xuanyi Yuan, Chong Wang, Yongge Cao
Summary: Eu3+-activated Gd4.67Si3O13 rare-earth silicate phosphor has been developed with high photoluminescence quantum yields exceeding 80%, comparable to commercial rare-earth nitride red phosphors. This phosphor can be excited by near-ultraviolet or blue light and emits red light at a dominant wavelength of 615 nm, making it suitable for warm white LED applications. Additionally, it exhibits good thermal cycling stability and has potential applications in optical temperature measurement systems with a maximum relative sensitivity of 1.05 x 10(-2) K-1 at 456 K.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Ceramics
Siling Liu, Lin Zeng, Zhou Zhao, Miao Deng, Xiaomeng Wang, Wentao Zhang
Summary: A single-component Ca3YAl3B4O15 (CYAB):Dy3+, Eu3+ phosphor was synthesized and codoped to achieve warm white emission. The results showed that the codoped samples had the standard CYAB structure without impurity phases. The dual emission of Dy3+ and Eu3+ enabled the realization of warm white light, and the correlated color temperature decreased with increased Eu3+ content. The single-component Dy3+/Eu3+ codoped CYAB phosphor has potential applications in UV excited warm white LEDs.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Xue Huang, Wentao Zhang, Xiaomeng Wang, Jiyong Zhang
Summary: A new type of white-emitting phosphor Na2CaSiO4:Dy3+, Eu3+ was synthesized via the sol-gel method, and it was found that white light emission can be achieved under specific doping and synthesis conditions, showing potential application prospects in the field of white light-emitting diodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Hanxiao Kong, Guang Jia, Huilin Li, Zhaoxin Meng, Ning Zhang, Cuimiao Zhang
Summary: A variety of Bi3+ and/or Eu3+ doped KBaYSi2O7 phosphors with different colors have been successfully synthesized. The Bi3+ doped phosphors show intense cyan emission or unique narrow deep blue emission, which can be used for WLEDs. By adjusting the doping concentrations of Bi3+ and Eu3+, the luminescence colors of KBaYSi2O7 can be tuned. The as-synthesized phosphors exhibit great potential for application in WLEDs and solid-state lighting.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Dayu Huang, Pan Zheng, Ziyong Cheng, Qianqian Yang, Youchao Kong, Qiuyun Ouyang, Hongzhou Lian, Jun Lin
Summary: A hydrothermal method is used to synthesize two different single crystal materials with different shapes and phases. These materials can emit deep blue light and pure blue light. The difference in the distribution of Cl energy states is found to be the reason for the difference in luminescence properties.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Zhao-Feng Wu, Bin Tan, Zhi-Hua Fu, Ever Velasco, Xing-Wu Liu, Simon J. Teat, Kun Zhu, Kai Xing, Xiao-Ying Huang, Jing Li
Summary: A new luminescent metal-organic framework (LMOF) with water-induced phase transition has been constructed, showing changes in fluorescence that can be visually monitored. The material emits green and yellow light under different excitations, and can be used to fabricate white LEDs.
Article
Chemistry, Multidisciplinary
Zizhong Zhu, Chunjing Tao, Zhijun Wang, Zhiping Yang, Panlai Li
Summary: A series of Mg2Y2Al2Si2O12:Dy3+,Eu3+ phosphors were successfully synthesized, which can emit blue light, yellow light, and warm white light. By adjusting the concentrations of rare earth ions, warm white light emission can be achieved.
Article
Chemistry, Physical
S. A. M. Abdel-Hameed, M. A. Marzouk
Summary: In this study, long afterglow phosphors with different emission colors were prepared using the melt-quenching technique in the Zn2SiO4:Eu3+, Dy3+, Mn2+ system. The effects of doping elements and heat treatment on the optical properties were investigated. It was found that different heat treatment programs can result in transparent or opaque glass-ceramic materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Polymer Science
Chunfeng Wang, Jihua Wang, Zhenlong Men, Yongliang Wang, Zhidong Han
Article
Materials Science, Multidisciplinary
Jihua Wang, Zhidong Han, Yang Jin, Yongliang Wang
Article
Thermodynamics
Yongliang Wang, Xiangfei Meng, Chunfeng Wang, Zhidong Han, Hu Shi
Summary: Hollow silica microsphere (h-SiO2) has been used as a synergistic agent to enhance the flame retardancy of intumescent flame-retardant polystyrene. The incorporation of h-SiO2 resulted in improved limiting oxygen index (LOI), reduced peak heat release rate, increased residual ratio, and a more compact charred layer with enhanced thermal and gas barrier effects.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Materials Science, Multidisciplinary
Chunfeng Wang, Junwang Liu, Yongliang Wang, Zhidong Han
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Engineering, Chemical
Ruitian Bo, Junwang Liu, Chunfeng Wang, Yongliang Wang, Peigang He, Zhidong Han
Summary: Molecular dynamics simulations were used to investigate the structure and dielectric properties of PVDF-based composites with varying amounts of barium titanate (BT). Experimental results were used to validate the simulation findings. A model was proposed to predict the static dielectric permittivity of the composites and the structural evolution and micropolarization mechanism with increasing BT content were analyzed.
ADVANCES IN POLYMER TECHNOLOGY
(2021)
Article
Materials Science, Characterization & Testing
Junwang Liu, Mingting Zhang, Lizhu Guan, Chunfeng Wang, Lei Shi, Yi Jin, Chao Han, Jihua Wang, Zhidong Han
Summary: The study shows that optimizing filler distribution in composite systems can significantly improve the dielectric constant and breakdown field strength. The selective composite system has a dielectric constant between 12 and 13, with a breakdown field strength of up to 25.8 kV/mm, over three times higher than that of the pure composite system.
Article
Polymer Science
Tiefeng Zhang, Chunfeng Wang, Yongliang Wang, Lijun Qian, Zhidong Han
Summary: In ethylene-vinyl acetate copolymer composites, the synergistic effect between polycarbosilane and magnesium hydroxide significantly improves flame-retardant properties while forming a cohesive and compact char layer.
Article
Materials Science, Multidisciplinary
Tao Xu, Chunfeng Wang, Zhidong Han, Yongliang Wang
Summary: This study synthesized nitrogen-doped porous carbon materials and investigated the effect of nitrogen configuration on their electrochemical performance by adjusting the urea/chitosan ratio. The results showed that increasing the ratio of pyridonic N and pyridinic N can enhance the specific capacitance and conductivity of the materials.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Polymer Science
Tiefeng Zhang, Chunfeng Wang, Yue Wang, Yongliang Wang, Zhidong Han
Summary: The flame retardant effectiveness of Mg-Al LDH in polyethylene (PE) was improved by introducing 2-carboxy ethyl (phenyl) phosphinic acid (CEPPA) as a flame retardant modifier to prepare CEPPA-intercalated LDH (CLDH), which was then dispersed in PE through melt blending. The compact and fully developed char of the PE/IFR/CLDH composites were mainly attributed to the reactions between CLDH and the intumescent flame retardant (IFR), enhancing the flame retardancy of the composites.
Article
Chemistry, Physical
Lin Pan, Wenbo Gao, Ruitian Bo, Yanpeng Li, Chunfeng Wang, Yongliang Wang, Zhidong Han
Summary: In order to meet the diversified requirements for polymer-based composites in modern electronic devices and electrical systems, the simultaneous enhancement of thermal-electrical-mechanical properties is a great challenge. The gradient structured composites, designed by adjusting the distribution of temperature, electric and stress fields in polyethylene (PE) based composites with different Al2O3 contents, demonstrated superior through-plane thermal conductivity, high breakdown strength, and good tensile strength. Finite element simulation provided evidence for the action mechanism on gradient structure regulating temperature and electric field. The strategy of constructing gradient structure provides a feasible route to meet the comprehensive performance requirements of PE based composites in massive manufacture scenario for practical insulation applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Ruitian Bo, Jihua Wang, Chunfeng Wang, Yongliang Wang, Peigang He, Zhidong Han
Summary: In this study, molecular dynamics (MD) was used to simulate the distribution of BaTiO3 (BT) and graphene nanoplatelets (GNP) in polystyrene/poly-vinylidene fluoride (PS/PVDF) blends and predicted the phase transition phenomena. Combined with SEM observations and EDS element mapping, the selective distribution of BT in the PVDF phase and GNP in the PS phase was successfully predicted. MD simulations showed effectiveness in building co-continuous immiscible blends and predicting the selective distribution of functional fillers.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yongliang Wang, Baoqiang Liu, Ruiyang Chen, Yunfei Wang, Zhidong Han, Chunfeng Wang, Ling Weng
Summary: Silica nanoparticles were added to polypropylene composites with ammonium polyphosphate and pentaerythritol to enhance flame retardancy. The dispersion of nano-silica in the composite matrix was favorable and improved the flame retardancy. The synergistic effects between nano-silica and intumescent flame retardant were studied using various tests, and the results showed improved flame retardancy with the addition of nano-silica.
Article
Polymer Science
Qichao Song, Bo Wang, Zhiyu Han, Zhidong Han
Summary: Porous alumina continuum (PAC) prepared with the gelcasting method was applied to obtain silicone elastomer (SR) composites (PAC/SR). The study showed that PAC significantly improved the thermal conductivity of the composites and reduced the interfacial thermal resistance between PAC and SR.
Article
Materials Science, Multidisciplinary
S. Ai, Z. Xu, Z. Liu, H. Song, A. Wang, L. Zhang, Z. Han, G. Gao, D. Li, D. Shi
Summary: This paper discusses a thermal analysis method for controlling and predicting the inoculation effect during CGI melt solidification, showing that ferrosilicon in the range of 0.10-0.45% can improve solidification morphology. Increasing inoculant amounts decrease eutectic temperature difference, with 0.30% inoculation resulting in a 5.3°C increase and 0.45% leading to solidification in low hypereutectic form with significantly increased nodularity rates.
KOVOVE MATERIALY-METALLIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Samuele Colonna, Zhidong Han, Alberto Fina
