Article
Chemistry, Physical
Ruyi Han, Huimin Cao, Bo Li
Summary: The addition of H3BO3 to Ca2V2O7 ceramics significantly affects the microstructure, sintering mechanism, and microwave dielectric properties, resulting in reduced sintering temperature and improved performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Fang -Fang Wu, Di Zhou, Song Xia, Ling Zhang, Feng Qiao, Li-Xia Pang, Shi-Kuan Sun, Tao Zhou, Charanjeet Singh, Antonio Sergio Bezerra Sombra, Moustafa Adel Darwish, Ian M. Reaney
Summary: Low sintering temperature BVFWx ceramics prepared by solid-state reaction exhibit promising microwave dielectric properties and are suitable for low-temperature cofired ceramic technology and microwave device applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Ruixin Yang, Mingxia Wang, Tianying Qin, Enzhu Li, Chaowei Zhong
Summary: In this study, SrWO4-x wt.% Li2MoO4 (x = 2.5, 5, 7.5, 10) ceramics were synthesized at low temperature using the solid-state synthesis method. The effect of Li2MoO4 on the crystallization, activation energy, microstructure, and sintering process were discussed in detail. Li2MoO4 significantly reduces the sintering temperature of SrWO4 and promotes the shrinkage and densification of the ceramic at low temperature. Specifically, the SrWO4 ceramics containing 5 wt% Li2MoO4 sintered at 875 degrees C exhibits the most favorable microwave dielectric properties, demonstrating potential applications in the field of low-temperature co-fired ceramics (LTCC).
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Feng Shi, En-Cai Xiao
Summary: Single phase LiZnPO4 (LZP) microwave dielectric ceramics were synthesized at different temperatures via a conventional solid-state ceramic route. The sintering behavior, crystal structures, phonon characteristics, and dielectric properties were studied in detail, revealing a significant influence of sintering temperature on the properties of LZP ceramics.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Ceramics
Xi Wang, Shicheng Zhou, Kaiyang Liu, Shan Deng, Yaqi Xiao, Xiuli Chen, Huanfu Zhou
Summary: Extensive research has been conducted on microwave dielectric materials for their application in 5G and 6G communication technologies. This study broadened the sintering temperature range of MT-C ceramics using a composite of CeO2 and Mg2TiO4 ceramics, and stabilized their microwave dielectric performance. The prepared MT-C ceramics exhibited low loss and uniform density, making them suitable for industrial applications in the field of communication.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Huan-Huan Guo, Mao-Sen Fu, Di Zhou, Chao Du, Peng-Jian Wang, Li-Xia Pang, Wen-Feng Liu, Antonio Sergio Bezerra Sombra, Jin-Zhan Su
Summary: Microwave dielectric ceramics with excellent properties such as high quality factor, low sintering temperature, small density, and good temperature stability were achieved by incorporating (Cu1/3Nb2/3)(4+) substitution and 3 wt % H3BO3 addition in Li2TiO3. The resulting LTCN0.2 + 3 wt % H3BO3 materials showed promising applications for SG mobile communication devices and low-temperature co-fired ceramic technology. Additionally, they were chemically compatible with silver and exhibited high simulated radiation efficiencies and gains in patch antenna and dielectric resonator antenna designs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Yaping Deng, Pengyu Yao, Bo Li
Summary: This study investigates the effect of Li2CO3 doping on the microwave properties of Ba3V2O8 ceramics and successfully lowers the sintering temperature. XRD results indicate a strong correlation between Li2CO3 content and material properties.
Article
Materials Science, Ceramics
Lintao Liu, Xiaohan Zhang, Yiyun Zhang, Wei Du, Zhanbai Feng, Laiguo Wang, Haitao Wu, Jialun Du, Wangsuo Xia
Summary: In this study, LTATB(x) ceramics were fabricated by the traditional solid phase synthesis method, and their properties were investigated. The addition of H3BO3 was found to improve the microstructure of LTATB(x) ceramics and optimize the dielectric properties. Patch antennas prepared with LTZTB(1.0) and LTMTB3.0 ceramics showed excellent performance, meeting the application requirements for external antennas.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Guangyu Dong, W. Li
Summary: Co-doped Al2O3 ceramics with Cu/Ti/Mg can effectively reduce the sintering temperature and achieve high density and uniform microstructure at 1150 degrees C, but higher temperature may lead to abnormal grain growth.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Xian Xue, Xiaomeng Li, Jing Guo, Hong Wang
Summary: In this work, temperature stable dielectric ceramics with an ultra-low sintering temperature of 480 degrees C were prepared by mixing Ag0.5Bi0.5MoO4 with Ag2Mo2O7. The resulting ceramics exhibited good microwave dielectric properties and excellent temperature stability, making them potential candidates for microwave device applications. The ceramics also showed good chemical compatibility with aluminum.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Linzhao Ma, Pengcheng Zhang, Shucheng Liu, Quanzhang Wen, Qianbiao Du, Hao Li
Summary: The solid-state method was used to prepare LiZn4V3O12 ceramics, and the phase composition, crystal structure, and micromorphology of the ceramics were analyzed. XRD data and rietveld refinement confirmed that the ceramics were composed of LiZnVO4 and Zn3V2O8 in a 1:3 ratio. The results showed that the relative density affected the εr and Qxf values of the LiZn4V3O12 ceramics. At a sintering temperature of 720 degrees C for 4 hours, the ceramics exhibited high relative density (96.71%), low εr value (11.51), high Qxf value (53891 GHz), and negative τf value (-25.58 ppm/degrees C). XRD and SEM analyses demonstrated that LiZn4V3O12 ceramics can coexist with the Ag electrode, indicating its potential application in the field of LTCC.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yawei Chen, Meirong Zhang, Hongyu Yang, Enzhu Li
Summary: In this study, (Cu1/3Nb2/3)(4+) complex cation and BaO-ZnO-B2O3 glass frit were used to address the high sintering temperature and poor temperature stability of Ba3Nb4Ti4O21 ceramics. It was found that the addition of (Cu1/3Nb2/3)(4+) cation effectively reduced the suitable sintering temperature and improved temperature stability. BaO-ZnO-B2O3 glass further enhanced the low-temperature sintering characteristics. The results show promising microwave dielectric properties for Ba3Nb4Ti4O21 ceramics in low-temperature cofired ceramic technology applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Wentao Hao, Panpan Xu, Li Sun, Ensi Cao
Summary: CuO addition reduces the sintering temperature of TiO2 ceramics and potentially enhances the formation of Ti3+ ions to optimize their giant dielectric properties. However, excessive Cu+ ions inhibit the formation of Ti3+ ions leading to the disappearance of giant dielectric properties. Annealing increases the concentration of Ti3+ ions in the ceramics and restores their giant dielectric properties.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Xinyuan Lyu, Luchao Ren, Le Xin, Zhengxin Li, Xianxin Zhang, Zheng Luo, Pengchao Shao, Yuxiao Zhang, Panpan Lyu, Mingwei Zhang
Summary: In this study, an interesting attempt was made to lower the sintering temperature of MgGa2O4 for LTCC application by adding CuMoO4. Through ion substitution, the composites demonstrated different sintering and dielectric properties. The 0.5MgGa2O4-0.5CuMoO4 ceramics sintered at 900 degrees C showed the best comprehensive performance, making it more suitable for practical application.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Ceramics
B. Masin, K. Ashok, H. Sreemoolanadhan
Summary: Microwave dielectric ceramic powder of 0.95(Mg0.95Zn0.05)TiO3-0.05CaTiO(3) (MCT) was prepared using solid-state reaction method and different sintering techniques were employed. The hybrid microwave sintering technique showed better dielectric properties compared to other techniques.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)