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, Ceramics
Zheng Sun, Xiaosong Lvu, Weijia Luo, Jingda Guo, Qiuyue Wang, Jingru Hua
Summary: This study investigated the effects of BCu additive on the microstructure and microwave dielectric properties of ZZNT ceramics. The results showed that a small amount of BCu could significantly reduce the sintering temperature and form rutile-like and Zn0.17Nb0.33Ti0.5O2 secondary phases. The BCu-added ceramics also demonstrated excellent chemical compatibility with Ag electrode, making them suitable for LTCC applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Zhe Xiong, Bin Tang, Xing Zhang, Chengtao Yang, Zixuan Fang, Shuren Zhang
Summary: The study found that LB glass as a sintering aid lowered the sintering temperature of BNTCN ceramics, and the doped LB glass had significant effects on the structure, grain size, and dielectric properties. Excellent microwave dielectric properties were achieved at 950 degrees Celsius, indicating that the BNTCN ceramic doped with 5 wt% LB glass is a promoting LTCC material.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Electrical & Electronic
Ping Zhang, Xin Tian, Manman Hao, Sheng Xie
Summary: A novel BiZn2PO6 ceramic with good performance was successfully composited under ultra-low-temperature using the traditional solid-state reaction method. The crystal structure, microstructure, and microwave dielectric properties of the BiZn2PO6 ceramics were analyzed, revealing an orthorhombic structure and high relative density when sintered at 725 degrees C for 4 hours.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Zelai Cheng, Lin Gan, Yuan Liu, Juan Jiang, Tianjin Zhang
Summary: This study investigates the impact of SV addition on the microstructure, dielectric properties, sintering process, and defects behavior of microwave dielectric ceramics. It confirms the formation of SrTiO3 and glass phase, which leads to a decrease in sintering temperature. The variation in dielectric properties follows empirical mixture rules, with a near-zero tau(f) value obtained. The defects behavior, including oxygen vacancies and Ti3+ and V4+ dopants, is characterized, with a higher dielectric loss observed in the SV-added ceramics. Finally, a 0.7Li(2)Zn(3)Ti(4)O(12)-0.3Sr(3)(VO4)(2) ceramic exhibits excellent microwave dielectric properties and compatibility with silver electrode, showing potential applications in low-temperature co-fired ceramics (LTCC).
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Ravindra Deshmukh, Varsha Chaware, R. Ratheesh, Girish J. Phatak
Summary: The addition of BBSZ glass helps reduce the sintering temperature of zinc silicate and increase the sintered density of the composite, leading to higher dielectric constant and dielectric loss.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Ceramics
Pengxiang Gao, Kaiyang Liu, Xiaoli Wei, Xin Qu, Shan Deng, Yaqi Xiao, Jianhui Yang, You Wu, Xiuli Chen, Huanfu Zhou
Summary: Microwave dielectric properties of NaYW2O8 ceramics (NYW) were investigated in this study. The ceramics were synthesized at a low densification temperature using a solid-state reaction method. The effects of grain size, porosity, packing fraction, and lattice energy on the dielectric properties were studied. The NYW ceramics exhibited excellent microwave dielectric properties and chemical compatibility with Ag, making them suitable candidates for LTCC applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zhuo Xing, Juhai Weng, Chi Ma
Summary: A series of Zn2-xCuxGeO4 ceramics were prepared by solid-phase sintering, and Cu2+ substitution for Zn2+ improved the single-phase formation and densification. This led to significant improvement in microwave dielectric properties. The addition of sintering aids (B2O3) to a representative composition with x = 0.08 further reduced the sintering temperature and greatly enhanced the Qxf value. The chemical compatibility of the ceramics was confirmed through cofiring with silver electrodes, indicating promising potential for advanced substrates.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Xiaoli Wei, Yinghan He, Xiuli Chen, Huanfu Zhou
Summary: A novel low-temperature sintered ACaPr(MoO4)(3) (A = Na, K) microwave dielectric material was prepared and its crystal structure, lattice vibration characteristics, and microwave dielectric properties were investigated. The material exhibited high density and excellent microwave dielectric properties, along with good chemical compatibility with Ag electrodes for application in LTCC technology.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Haonan Cui, Hongcheng Yang, Hua Wang, Yixuan Zheng, Yuchen Wang, Hongyu Yang, Enzhu Li
Summary: CaO-Al2O3-B2O3 (CAB) glass-ceramics with varying Al2O3 content were prepared using the melting method. The samples exhibited good crystallization, dielectric properties, and sintering behavior.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Yunfeng Guo, Zexing Wang, Jiamao Li
Summary: In this study, novel LTCC materials with good microwave dielectric properties were developed by adding LiF sintering aid to LTCN ceramics. By adjusting the doping amount and sintering conditions of LiF, the microstructure and microwave dielectric properties of the ceramics were improved, making them potential materials for LTCC applications.
Article
Chemistry, Physical
Yan-Bo Guo, Kang Du, Chang-Zhi Yin, Jia-Qing Yang, Wei Luo, Fei Wang, Wen-Zhong Lu, Wen Lei
Summary: Al2-xScxMo3O12 (x = 0 - 0.6) ceramics were synthesized by a solid-state reaction. The doping of Sc3+ can adjust the phase transition temperature and improve the microwave dielectric properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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
Zexing Wang, Yunfeng Guo, Jiamao Li, Canhua Li
Summary: In this study, a novel oxyfluoride ceramic Li3TiO3F was successfully prepared and its microstructure and microwave dielectric properties were optimized. The ceramic exhibited favorable microwave dielectric performance when sintered at 900 degrees C, showing great potential for applications in LTCC technology.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Xianqiang Chen, Binfeng Zhao, Naichao Chen, Jin Cheng, Mingzhao Dang, Feng Wang, Xinwei Xu, Hong Wang
Summary: Nano-sized CaF2 powders synthesized using a wet chemical method enable low-temperature sintering and superior microwave dielectric properties. The addition of LiF as a sintering aid further improves the microwave dielectric properties of CaF2 ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Dan Zhao, Yi Feng, Zhipeng Pi, Fan Zhang
Summary: Phase equilibria in the ZrO2-GdO1.5-TaO2.5 (ZGTO) system were experimentally investigated, and the differences between ZGTO and the existing ZrO2-YO1.5-TaO2.5 (ZYTO) were discussed. The study is useful for thermodynamic assessment of ZGTO and can guide the design of novel thermal barrier coatings materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yutaka Ohya, Wingki Mey Hendra, Chika Takai-Yamashita, Takayuki Ban
Summary: Diffusion couples of rutile and corundum single crystals were prepared and examined to study the solid solution and precipitation of corundum in rutile during cooling. Different precipitation forms of corundum were observed under different cooling conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiaming Zhan, Yunfa Guo, Hao Wang
Summary: This study systematically investigates the mechanical behaviors of calcium fluoride in humid environments. The effects of water on the deformation and plastic enhancement of CaF2 under indentation are explored through microindentation experiments, atomic simulations, and Raman spectroscopy measurement.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hangfeng Zhang, Henry Giddens, Theo Graves Saunders, Matteo Palma, Isaac Abrahams, Haixue Yan, Yang Hao
Summary: The relationship between low and high frequency tunabilities in tin substituted barium titanate ceramics was investigated. It was found that there are differences in tunabilities at different frequencies due to the different activities of larger ferroelectric domains and polar nanoclusters.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Kaibiao Xi, Jiacheng Liu, Beibei Song, Huarong Cheng, Yihao Li, Xiaole Yu, Mupeng Zheng, Mankang Zhu, Yudong Hou
Summary: Composite modulation in the superparaelectric state of the BTBZ-CT system is proposed as an effective strategy to achieve both NTCC and excellent energy storage performance in dielectric ceramics. The addition of BZ and CT to BT ferroelectrics can move the SPE state to the normal use temperature zone, resulting in enhanced NTCC characteristics and energy storage performance. Furthermore, intentional precipitation of CT at grain boundaries can refine the grain size, increase the bandgap, and strengthen the local electric field distribution, thereby enhancing the breakdown electric field.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hamed Salimkhani, Lovro Fulanovic, Till Froemling
Summary: The demand for robust multilayer ceramic capacitors with high-temperature and high-power capabilities is increasing rapidly. However, cost-effective production is a challenge. This study investigates the use of Na0.5Bi0.5TiO3-based materials as promising lead-free options. By adding sintering aids, the sintering temperature of Na0.5Bi0.5TiO3-BaTiO3-CaZrO3-BiAlO3 solid solutions was successfully reduced to 975 degrees C, suitable for co-sintering with Cu electrodes without adverse effects on capacitor properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Mingxing Li, Ran Mo, Zeshui Xu, Jie Zhou, Conglin Zhang, Xuefeng Cui, Fang Ye, Laifei Cheng, Ralf Riedel
Summary: Polymer infiltration and pyrolysis is an effective method for preparing ceramic matrix composites. The transformation of polymer to ceramic during the process affects the residual stress and interface behavior in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yan Kang, Lin Chen, Chang-Jiu Li, Guan-Jun Yang
Summary: A novel abradable seal coating with low hardness and high bonding strength was successfully designed and prepared. This coating has significantly higher abradability and erosion resistance compared to metal-based coatings, and can retain excellent abradability and have a long lifetime during service.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Qingzhong Song, Xiangdong Zha, Ming Gao, Yingche Ma
Summary: This study analyzes the influence of calcia refractory purity on the properties of calcia crucibles. Higher purity calcia results in well-developed grains and improved hydration resistance, leading to better high-temperature strength and thermal shock resistance. In contrast, lower purity calcia crucibles exhibit inferior properties. Therefore, high-purity calcia is considered a potential refractory for manufacturing oxide crucibles.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sehreish Abrar, Faisal Nazeer, Zhuang Ma, Ling Liu, Abdul Malik, Mustafa Kamal, Abdullah G. Al-Sehemi
Summary: To raise the operating temperature of Si-based ceramic matrix composites (CMCs), researchers have applied thermal/environmental barrier coating (T/EBCs) materials, typically rare earth silicates. However, the high thermal conductivity and the mismatch of thermal expansion have been major challenges in developing new materials that can offer thermal insulation and environmental protection to CMCs. In this study, entropy engineering was used to create a multicomponent equi-atomic single-phase pyro silicate with extremely low thermal conductivity and enhanced water vapor corrosion resistance. The research findings show the potential of high entropy disilicates in achieving ultra-low thermal conductivity and low weight loss in corrosive environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zi-bo Niu, Daxin Li, Dechang Jia, Zhihua Yang, Kunpeng Lin, Paolo Colombo, Ralf Riedel, Yu Zhou
Summary: In this study, SiBCN ceramics with a special structure were prepared to improve the oxidation resistance. The effect of the structure on oxidation behavior and kinetics was investigated, revealing that the special structure can effectively inhibit heterogeneous oxidation and enhance the oxide layer composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Melike Donmez, Metehan Erdogan, Cihangir Duran
Summary: The limited densification of CeO2 ceramics was improved by using an anorthite-based glass, resulting in high dielectric constant and quality factor with minimum dielectric loss. The CeO2-(anorthite-based) glass ceramic showed promising results in terms of low temperature densification and microwave properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
S. Rahmati, R. G. A. Veiga, J. Mostaghimi, T. Coyle, A. Dolatabadi
Summary: This study provides an atomic-scale description of the high-velocity impact of alpha-Al2O3 particles onto an alpha-Al2O3 substrate during Aerosol Deposition (AD). The results suggest that the crystal orientation plays a crucial role in both plasticity and damage of the nanoparticles. Impact velocity has a direct correlation with plasticity and fragmentation, but adhesion efficiency has only a marginal increase. The crucial element lies in the substrate's surface alterations caused by the fragments left on the substrate after impact.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Bo-Wen Chen, Yan-Mei Kan, De-Wei Ni, Chun-Jing Liao, Hong-Da Wang, Yu-Sheng Ding, Shao-Ming Dong
Summary: This study characterized the long-term and repeated ablation properties of modified Cf/HfC-SiC composites with YB4-Al2O3-Si3N4 under an air plasma torch. The structural stability and viscosity of the oxide layer were found to affect the ablation resistance of the composites. By forming nano c-HfO2 grains and high-viscosity Al-Si-Y-O glassy phase, the structural stability of the oxide layer was improved, resulting in enhanced ablation resistance. However, the oxidation of Si3N4 led to the formation of NO, NO2, and excessive SiO2 glassy phase, which resulted in a porous structure and reduced the viscosity of the oxide layer. Therefore, the addition of Si3N4 decreased the ablation resistance of the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yongxing Wei, Huawei Zhang, Siyuan Dong, Changqing Jin, Chenxing Bai, Junle Dai, Zengzhe Xi, Zhonghua Dai, Zengyun Jian, Li Jin
Summary: In this study, solid solutions of xBi(Ni1/2Hf1/2)O-3-(1 - x)PbTiO3 (xBNH-PT) were synthesized to investigate their phase boundary behaviors and physical properties. The presence of a tetragonal-pseudocubic phase boundary and a spontaneous ferroelectric-relaxor transition at specific compositions were confirmed. The introduction of a tetragonal-pseudocubic phase boundary improved the piezoelectric properties and suppressed the spontaneous ferroelectric-relaxor transition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)