Journal of Energy Storage
·
2024
·
IF 8.9
Rui-You Jian,Chia-Chen Li
This research investigates challenges associated with gelation in Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) slurry preparation for solid-state Li-ion batteries. Gelation arises from a cross-linking reaction between the sintering aid , boron oxide (B 2 O 3 ), and the poly(vinyl butyral) (PVB) binder. With increasing B 2 O 3 content, LLZTO slurry viscosity dramatically rises, resulting in unsuitable solid-like behavior for tape casting. The alkaline nature of LLZTO powder intensifies cross-linking, a phenomenon confirmed through boron-11 nuclear magnetic resonance spectroscopy. To mitigate gelation, diol compounds, such as ethylene glycol, are introduced to deactivate B 2 O 3 -PVB cross-linking, with selection guided by support from density functional theory-based simulations.
研究领域:
材料科学
·
化学
·
固态电池
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2025
·
IF 9.6
Tauqeer Ahmad,Wen Lei,Burhan Ullah,Wen-zhong Lu
A series of (Sr 0.4 Ce 0.4 )TiO 3 + 4% (in mass) Sr 2 CeO 4 + x % B 2 O 3 (SCTO + 4% SCO + x % B 2 O 3 for 1≤ x ≤ 5) composites were synthesized via solid-state reaction to investigate the effects of Sr 2 CeO 4 and B 2 O 3 additives on their structural evolution and microwave dielectric properties. X-ray diffraction (XRD) and Rietveld refinement confirmed the dominant orthorhombic phase (O-phase), with SCO as a secondary phase, indicating a chemically stable composite system. HRTEM and SAED analyses further confirmed the formation of the O-phase through direct observation of the superlattice reflections. Microstructural evolution demonstrated B 2 O 3 -assisted liquid-phase sintering, reducing porosity (0.017→ 0.006) and increasing grain size (3.34 → 6.01 μm) with increasing x % (in mass). Raman spectroscopy verified octahedral tilting and Ce–O stretching, while B 2 O 3 incorporation modified the TiO 6 network via BO 3 /BO 4 interactions. The ε r decreased from 113 (SCTO) to 27 at x = 5%, while τ f improved from +213 to +12×10 –6 /°C. The reduction in ε r arises from a complex interplay of internal factors (ionic polarizability) and external factors (porosity, and density), whereas the variation in τ f is governed by compensating effects from Sr 2 CeO 4 and B 2 O 3 . Optimal microwave performance was achieved at x = 5%, with Q×f = 43,603 GHz, ε r =27, and τ f of +12×10 –6 /°C. The study demonstrates that SCO and B 2 O 3 act as effective modifiers, enhancing densification and dielectric properties in SCTO-based microwave ceramics.
研究领域:
材料科学
·
电子材料
·
功能陶瓷
·
介电材料
·
微波技术
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
RADIOCHIMICA ACTA
·
2021
·Vol. 110
·期 3
·193-203
·
IF 1.44
Wenhong Han,Guilin Wei,Yi Liu,Xirui Lu,Shunzhang Chen,Zhentao Zhang,Yi Xie,Xiaoyan Shu
A new glass solidification process aims at radioactive iodine waste was explored in order to reduce the possible harm to environment. Samples with different iodine content in silver-coated silica gel were pretreated by hydration device at 300 °C and then sintered at relatively low temperatures (500, 550 and 600 °C). XRD results show that AgI is mainly chemically fixed in the glass network with some AgI particles being physically wrapped by the glass. Moreover, as the sintering temperature reached to 550 °C, B element crystallized. SEM-EDS results show that Ag and I elements are enriched, while the other elements are evenly distributed. AFM results showed that the sample surface becomes rougher as the iodine content increases in the silver coated silica gel. The FT-IR results show that the structure of the sintered sample is mainly composed of [BiO 3 ], [BiO 6 ] and [BO 3 ]. This study provides a new sintering method by hydration device for the treatment of radioactive iodine waste.
研究领域:
材料科学
·
核废物处理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Longqing He,Zhiwei Luo,Haozhang Liang,Nanshan Ma,Xinzhu Liu,Xiaofeng Wang,Ziyou Zhou,Anxian Lu
Li 2 O–ZnO–B 2 O 3 -WO 3 (LZBW) sealing glasses for Si substrates were prepared and the effect of WO 3 on the structure, thermal properties, and sintering behaviour was investigated. As the WO 3 increases from 0 to 12 mol%, the glass transition temperature and softening temperature reach the lowest values of 448 °C and 479 °C, respectively, at which time the glass network has the lowest degree of polymerization. The thermal expansion coefficient increases from 6.959 × 10 −6 /°C to 8.476 × 10 −6 /°C with increasing WO 3 contents. It is verified that the introduction of WO 3 can effectively improve the conductivity. The sealing property of the glasses was evaluated by the wetting angle of the glasses after co-sintering with Si substrate for 10 min at 860 °C, and the 25Li 2 O-7ZnO-2.7Bi 2 O 3 -1.3P 2 O 5 -55B 2 O 3 -9WO 3 glass had the minimum wetting angle of 34.07°. The excellent thermal properties, conductivity, and wetting behaviour of the LZBW glasses make it a potential material as a binder material for positive silver pastes.
研究领域:
材料科学
·
无机非金属材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2020
·Vol. 22
·期 5
·1901486
·
IF 3.217
Xiangyan Feng,Yuanyuan Lv,Lan Zhang,Jianjun Ding,Jun Sun,Xiaoxiao Li,Lin Chen,Kang Zheng,Xian Zhang,Xingyou Tian
With the rapid development of microelectronic information technology, high-power electronic devices require high heat dissipation. Herein, the preparation of low-temperature cofired ceramic (LTCC) applications with excellent thermal conductivity and dielectric properties is focused. B 2 O 3 –Bi 2 O 3 –SiO 2 –ZnO (BBSZ) glass/Al 2 O 3 /BN green sheets are prepared by tape casting and sintered at 850 °C. The crystal phase composition, microstructure, thermal conductivity, thermal expansion coefficient, and dielectric properties of LTCC are investigated. It is shown that nanoscale rod crystals ZnAl 2 O 4 and Bi are formed in the composite. The generated nanoscale rod crystals build a 3D heat conduction channel in the composite. The thermal conductivity of the sintered sheet with 20 wt% BN is 5.165 W m −1 K −1 . The sintered sheet containing 20 wt% BN has a low coefficient of thermal expansion (2.92 ppm °C −1 ) matched well with silicon and excellent dielectric properties ( ε r = 3.9672, tan δ = 1.49 × 10 −3 ) at 20 GHz. This material has great potential applications in electronic devices.
研究领域:
材料科学
·
电子材料
·
陶瓷
·
微电子
·
热管理
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Xiaoting Zhang,Bin Cui,Yu Qiu,Rong Ma,Yueyao Fan
In this paper, morphology engineering was developed to optimize the overall temperature-stable energy storage performance of ceramic capacitors. First, SrSn 0.1 Ti 0.9 O 3 (SST) particles were coated on Na 0.5 Bi 0.5 TiO 3 (NBT) rods to form "core-shell" NBT@SST rods by a co-precipitation method to improve the relaxor behavior. And the rods were compounded with the Bi 2 O 3 -B 2 O 3 -SiO 2 (BBS) glass to dense into NBT@SST-BBS composites. The nanorods morphology of ceramic grains can increase the charge storage sites to induce higher polarization value. The moderate- ε r SST shell with highly lattice matching could lower the interfacial polarization between ceramic and glass phase so as to boost the breakdown strength. Comparatively, composites with nanorod morphology can reach the highest recoverable energy density of 2.19 J/cm 3 at 229 kV/cm with superior temperature stability ( Δε/ε 150 ° C ≤ 15% at 30–395 °C). We hope this work will give guidance to fabricate the next-generation dielectric capacitors through morphology engineering.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Huimin Song,Naizheng Wang,Wang Liu,Jingcheng Feng,Jun Shen,Wei Dai,Zheshuai Lin,Jiyong Yao,Guochun Zhang
A gadolinium-rich borate Gd17.33(BO3)4(B2O5)2O16 was successfully grown by the high-temperature solution method using the Rb2O–B2O3 flux. The crystal crystallizes in centrosymmetric space group C2/m with lattice constants a = 18.4300(2) Å, b = 3.7400(4) Å, c = 14.2047(16) Å, and β = 119.8550(12)°. Two different honeycomb-like [GdO] layers alternately arrange in the order ABAB forming the three-dimensional framework, in which the isolated [B2O5] and [BO3] units fill in channels of the 12-membered and 10-membered [GdO] polyhedral rings, respectively. The UV cutoff edge of Gd17.33(BO3)4(B2O5)2O16 is less than 240 nm. The maximum −ΔSm,max is 26.53 J kg–1 K–1 or 174.70 mJ cm–3 K–1 (T = 4.4 K and ΔH = 7 T) as investigated by the isothermal magnetization method.
研究领域:
材料科学
·
固体物理学
·
晶体学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2024
·Vol. 110
·期 3
·910-921
·
IF 2.3
Jin Xiaotong,Yuan Kangkang,Ji Xingxiang,Li Chengshun
Porosity and thermal stability are the main constraints that determine the performance of zirconia (ZrO 2 ) for a wide range of applications, including adsorption, catalysis, filtration, etc. Here, we have proposed the rational design of electrospun ZrO 2 nanofibers (NFs) with high surface areas and good thermal stability. Water vapor pre-treatment was used to modify the surface structure of the NFs with the removal of soft templates at a lower temperature. In addition, amorphous B 2 O 3 was introduced into the ZrO 2 NFs to improve the thermal stability of the porous structure. The as-prepared NFs had high surface area of 380 m 2 /g and even 300 m 2 /g after heat treatment at 450 °C. The catalytic activity of modified ZrO 2 NFs as support materials in bromination reaction of phenol red was tested. And a high specific bromination activity of 3.02 mmol h −1 g −1 was obtained. This work could provide promising strategies for preparing electrospun porous oxide NFs with high surface area and good thermal stability in order to optimize performance. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xin Wang,Yao Luo,Chen Zhang,Xin Li,Qi Li,Jianliang Xie
To meet the need for ultrathin high-temperature radar-stealth coatings with effective X-band absorption, a metasurface-regulated FeSiCr/CaO-B 2 O 3 -SiO 2 (FSC/CBS) composite coating was designed. FSC/CBS coatings with different FSC contents were fabricated by atmospheric plasma spraying to examine the effects of absorber loading on particle state, microstructure, electromagnetic parameters, and high-temperature absorption. Increasing FSC content raised the in-flight particle temperature and promoted FSC spreading and flattening, causing the absorbing phase to evolve from isolated particles to lamellar structures and locally connected conductive networks. These structural features enhanced interfacial polarization and conduction loss, whereas excessive FSC aggregation suppressed the effective magnetic response through demagnetization and skin-effect shielding, degrading impedance matching. The 1-mm-thick 40FSC/CBS coating showed stable Ku-band absorption at 600 °C, with reflection loss below −5 dB over 11.7-18.0 GHz. After metasurface loading, its effective absorption band was regulated to 8.0-13.78 GHz, covering the entire X band, and the cavity radar cross section was reduced by 12.17 dBsm.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiale Wu,Xinyu Zhao,Jin Hu,Zhongshan Deng,Yongjin Feng,Hongtao Fan,Junkai Li,Qingming Chen,Kaijun Wang,Kaizhao Wang
Considering the growing hazards of ionizing radiation, developing new shielding glass systems is essential to increase radiation safety and diversity of material choices in the real-time monitoring field. Based on the excellent comprehensive performance exhibited by high-entropy oxide glasses (HEOGs) due to its unique component composition and high-entropy effect, B 2 O 3 -TeO 2 -BaO-Bi 2 O 3 -MO (W, Ta, Dy, Mo) HEOGs with heavy metal oxides as the fifth component were prepared via the melt-quenching process. Physical, structural, and optical properties analysis show that the tantalum pentoxide (Ta 2 O 5 )-optimized HEOG has higher densification, more continuous and compact network filling, and wider indirect optical bandgap (Eg) than other glasses. The radiation attenuation ability of HEOGs was evaluated utilizing the MCNPX simulation and Phy-X program. The minimum specific lead equivalent (PbE) value of all heavy metal HEOGs in the entire photon energy range (10 −3 –10 3 MeV) is much higher than all types of commercial lead glass in service, showing excellent comprehensive attenuation ability for X-rays, γ-rays, and fast neutrons. In addition, the addition of Ta 2 O 5 dramatically shortens the path and attenuation times required for incident photons to annihilate inside the material due to the density increase effect brought by the high atomic number and high density. In the 100 MeV nuclear radiation area and the 0.08 MeV medical X-ray application zone, only 10 cm and 0.3 cm thickness are needed to achieve saturated absorption of photons.
研究领域:
材料科学
·
核物理
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
PLoS One
·
2024
·Vol. 19
·期 4
·e0299218
·
IF 2.9
Zhonglei Meng,Rongxiu Qin,Rusi Wen,Junkang Xie,Guiqing Li,Yonghong Zhou
To enhance the yield of the one-step synthesis of terpinyl acetate from α-pinene and acetic acid, this study evaluated α-hydroxycarboxylic acid (HCA)–boric acid composite catalysts based on orthogonal experimental design. The most important factor affecting the terpinyl acetate content in the product was the HCA content. The catalytic performance of the composite catalyst was related to the pKa1 of HCA. The tartaric acid–boric acid composite catalyst showed the highest catalytic activity. The α-pinene conversion reached 91.8%, and the terpinyl acetate selectivity reached 45.6%. When boric acid was replaced with B2O3, the HCA composite catalyst activity was enhanced, which reduced the use of HCA. When the lactic acid and B2O3 content accounted for 10% and 4% of the α-pinene mass content, respectively, the α-pinene conversion reached 93.2%, and the terpinyl acetate selectivity reached up to 47.1%. In addition, the presence of water was unfavorable to HCA–boric acid composite catalyst. However, a water content less than 1% of the α-pinene mass content improved the catalytic activity of HCA–B2O3. When the tartaric acid–B2O3 was used as catalyst, and the water content was 1% of the α-pinene mass content, the α-pinene conversion was 89.6%, and the terpinyl acetate selectivity was 47.5%.
研究领域:
化学工程
·
催化
·
有机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 36
·16909-16917
·
IF 3.5
Xie Jingru,Fu Zhifen,Cheng Qing,Chen Chen,She Yubin,Li Xiangyi
Low temperature co-fired ceramics (LTCC) technology is extensively utilized to meet the requirements of device integration and miniaturization. Low-fired Li 3 Mg 2 NbO 6 ceramics doped with x wt% Li 2 O–MgO–B 2 O 3 –CaF 2 –SiO 2 glass (LMBCS, x = 0.5, 1.0, 1.5, 2.0) were prepared by the solid-state reaction method for applications in microwave communication materials. All samples exhibited a single-phase Li 3 Mg 2 NbO 6 structure. The addition of LMBCS glass effectively reduced the sintering temperature of Li 3 Mg 2 NbO 6 ceramics from 1250 °C to 875 °C. And adding LMBCS glass improved the Q × f value of Li 3 Mg 2 NbO 6 ceramics. The Li 3 Mg 2 NbO 6 -1.0wt% LMBCS ceramics exhibited outstanding microwave dielectric properties: ε r = 16.8, Q × f = 89,495 GHz, τ f = − 27.4 ppm/°C at 875 °C, which indicates that this ceramic is potential candidate materials for LTCC.
研究领域:
材料科学
·
电子陶瓷
·
功能材料
·
无机非金属材料
·
微波通信材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）