ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 25
·1705701
·
IF 13.325
Ben Wang,Kai Fung Chan,Jiangfan Yu,Qianqian Wang,Lidong Yang,Philip Wai Yan Chiu,Li Zhang
Ferromagnetic particles (FMPs) have attracted a large amount of attention for tumor treatment in recent decades in the form of magnetic hyperthermia and thermoablation therapies. Previous research has commonly focused on the improvement of the specific loss power and the increase in the particle concentration to enhance the heating temperature during hyperthermia. Instead of magnetic hyperthermia with passive particles, here a feasible approach of using reconfigurable swarms of ferromagnetic colloidal particles is reported to realize enhanced local hyperthermia. The concentration of the particle swarm can be tuned up to 500% of the original particle concentration via reversible pattern transformation, i.e., shrinking and swelling. The FMP swarms with a controllable pattern size show their potential for directed energy delivery and offer a new strategy for realizing a highly localized heating effect using a low dose of the active FMPs.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤治疗
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2014
·
IF 2.307
Yinsheng Li,Jie Yin,Haibo Wu,Ping Lu,Yongjie Yan,Xuejian Liu,Zhengren Huang,Dongliang Jiang
In order to attain high thermal conductivity , SiC was doped with ultra-low amounts of B and C as sintering additives using boric acid together with d -fructose as boron–carbon sources. The contents of in situ generated B and C were both tailored as low as 0.4 wt.%, which can significantly reduce the impurities induced phonon scattering effect. The SiC ceramics were pressureless densified at 2150 °C for 1 h, and some samples experienced subsequent annealing at 1950 °C for 4 h. High thermal conductivities of 180.94 W/(m K) for the as-sintered SiC ceramics and 192.17 W/(m K) for the annealed specimens at room temperature were achieved. The reasons for the high thermal conductivity in the polycrystalline SiC ceramics were specified, based on the close correlation with microstructure.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Fang Jia,Ruili Wu,Chan Liu,Jinle Lan,Yuan-Hua Lin,Xiaoping Yang
Recently, aerogels have been considered as hopeful thermoelectric (TE) materials because of their unique ultralow thermal conductivity compared to conventional bulk/film materials. However, their electrical conductivity cannot meet the requirement of good TE materials due to their highly porous feature. Herein, we composited poly(3,4-theylenedioxythiophene) (PEDOT) with SWCNT and bacterial cellulose (BC) to synthesize nanoporous PEDOT/SWCNT/BC films that can achieve high electrical and low thermal conductivity simultaneously by post-processing of their hybrid aerogels. A relatively high electrical conductivity of 290.6 S/cm and a low thermal conductivity of 0.13 W m–1 K–1 have been achieved for free-standing PEDOT/SWCNT/BC-32% film at room temperature. Furthermore, the films show an outstanding flexibility and fracture strength of 1.6 MPa and an elongation at break of 2.13%. The unique advantages of excellent flexibility and high electrical conductivity as well as low thermal conductivity make PEDOT/SWCNT/BC films have broad prospects in wearable thermoelectric applications.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Chengzong Zeng,Chaofan Ma,Jun Shen
Gallium (Ga)-based liquid metal (LM) paste is deemed to have potential and extensive applications in the thermal management of electronics. However, some non-metallic carbon-based materials such as diamond or carbon fiber (CF) cannot be wetted by Ga, which is difficult to prepare composites using manual stirring without surface modification. Here, the repeated compression method of the forced wetting was successfully used to prepare the Ga-based LM composites containing carbon-based materials without surface modification. New oxide skin of LM will generate during repeating compression. The bonding mechanism between diamond (/CF) and Ga is that Ga oxide is attached to the diamond (/CF) and then being wetted and coated by Ga. Diamond and CF can be separated and recycled from Ga-based paste. A high thermal conductivity value of 129 W m −1 K −1 was obtained by inducing the distribution of CF using diamond particles, in which liquid Ga was the connecting phase. The density of Ga can be reduced by 21% and the thermal conductivity of the Ga-based paste over 100 W m −1 K −1 can be maintained. The successful development of the Ga-based LM/diamond/CF composite indicates that excellent thermal conductivity can be achieved by inducing the distribution of anisotropic particles using isotropic particles.
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xidong Wang,Yanrong Liang,Jiawei Liu,Qianxiong Wen,Cong Zhao,Xiaojuan Liang,Zhaopin Chen,Weidong Xiang
Phosphors in glass films (PiFs) is considered ideal conversion materials for laser lighting, but heat dissipation issue is the main challenge limiting its development. Therefore, it is urgent to find more excellent heat dissipation materials. Herein, we proposed to use AlN with high thermal conductivity as the substrate, and innovatively introduced TiO 2 coating to improve the interface reflection ability and solve the possible problems of shedding and cracking. After a series of optimizations, the LSN PiG-TiO 2 -AlN (PTA) color converter obtained a high thermal conductivity of 29W m −1 k −1 and a low surface temperature. At an input power of 5.2W, the luminous efficiency can reach 175 lm/W and the relative initial intensity can still be maintained by 95.3% at 200 °C. Benefiting from the extremely strong heat dissipation capacity of the AlN substrate, the LSN PTA color converter maintains its relative luminous intensity at 95 % of the initial intensity after 24 h of continuous illumination, which is the best value recorded so far. In addition, LSN PTA is combined with CaAlSiN 3 :Eu 2+ phosphor to achieve high-quality white light with a CRI of 82.5. The above results indicate that LSN PiG-TiO 2 -AlN color converters have a promising research prospect in the field of laser lighting.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yong Li,Dedan Mu,Jing Yu,Zheng Wei,Man Zhang,Peng Zhang,Feng Zhang,Yinxi Liu,Pin Xiang,Zhaohong Li,Jianbei Qiu,Bitao Liu
Halide perovskites with excellent thermal stability will have better application prospects in the field of X-ray scintillation detectors. However, conventional scintillators exhibit low thermal stability, which limits their effectiveness in practical applications. In this study, we designed and developed a Cs 2 CuCl 4 scintillator with enhanced thermal stability. Through the preparation of Cs 2 CuCl 4 and the execution of heating and cooling cycle tests, we demonstrated that the Cs 2 CuCl 4 scintillator possesses high thermal stability. This stability is attributed to the high valence stability of the divalent copper ions, which are positioned in stable tetrahedral centers, thereby enhancing their structural integrity. The scintillator achieves a high steady-state light yield of 42,260 photons MeV −1 and exhibits the highest spatial resolution for powder-based scintillation screens at 20 lp mm −1 after undergoing cyclic treatment within the temperature range of 323 K to 673 K. Furthermore, the scintillator is capable of visualizing the melting of alloys, indicating its significant potential for application in high-temperature environments. This study offers a novel perspective on the design of scintillators with high thermal stability.
研究领域:
材料科学
·
物理学
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Junchi Wang,Wenyao Guo,Xiaoling Ma,Xiaobo Yan,Hui Yao,Min Guo,Guoning Li,Shijie Li,Ping Cui,Mingzhi Yu,Hui Li
Stearic acid (SA) is recognized as a promising phase change material (PCM). Nevertheless, poor thermal conductivity and leakage are great challenges for SA in practical application. To this end, the shape stabilized PCM (CTX/SA) with high thermal conductivity is fabricated by impregnating SA into the in situ N-doped carbon (CTX) derived from chitin (CH). The thermal storage performance of CTX/SA is investigated to acquire the optimal carbonization temperature for CTX. Meanwhile, characterizations of FTIR, XRD, SEM, and N 2 isothermal adsorption-desorption are conducted to reveal the influence of CTX on thermal storage performance. The synthesized CT800/SA exhibits high thermal conductivity of 0.461 W/(m·K) and thermal storage efficiency of 92.84 % with a low supercooling degree of 1.06 °C. CT800/SA also has desirable thermal stability and reliability even after 200 repeated thermal cycles. Moreover, the photothermal conversion of CT800/SA is 74.12 %.
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
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 56
·期 44
·445501
·
IF 3.4
Rui Yang,Hao-ou Ruan,Si-di Fan,Kai-xuan Sun,Sheng-hui Wang,Xiang Yu,Fang-cheng Lü
Encouraged by the goal of achieving net-zero carbon emission by 2050, the exploration of insulating material becomes one of the core projects to the electrical equipment innovations. The rise of composites enables the insulating material to be endowed with more functions. By this concern, adopting the coupling agents is one of the effective methods to improve the compatibility of composites, which highly strengthens the desired properties. The functional groups of coupling agents, nevertheless, could not always show a positive impact to access enhanced properties. In this work, four types of silane coupling agents including amino-propyl, glycidyletheroxy-propyl (GP), vinyl, and methacryloxy-propyl functional groups are employed to modify the aluminum nitride (AlN) fillers, and the modification effects on the insulating and thermal conductivity of the AlN/poly(m-phenylenedicarbonyl-m-phenylenediamine) (PMIA) composite paper are systematically investigated and compared. The results show that a proper coupling agent is beneficial to the uniform dispersion of the inorganic filler in the organic matrix and highly contributes to their interface quality, where the heat transfer path is established that boosts the heat dissipation. By tailoring the trap depth and density toward deeper and higher, the carrier transport is highly confined which enhances the breakdown strength to a large extent. Therefore, high breakdown strength and thermal conductivity of 182.9 kV mm−1 and 0.302 W (m·K)−1, respectively, are achieved in the GP modified AlN/PMIA paper, which are 16.7% and 167.4% higher than that of pure PMIA paper.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·Vol. 55
·期 5
·3995-4000
·
IF 2.4
Chen Angran,Zhang Yanyun,Coetsee Theresa,Kaldre Imants,Wang Cong
EH36-shipbuilding steel has been welded by CaF 2 -ZrO 2 fluxes with designed ZrO 2 additions. Possible chemical and electrochemical reactions have been postulated to analyze alloying element transfer behaviors. The decomposition of ZrO 2 during SAW has been validated by applying the gas–slag–metal equilibrium model and the O supply capacity of ZrO 2 has been quantified. For the entire compositional range, O content has been controlled within a well-maintained range from 220 to 400 ppm, and the transferred quantity of Zr content reaches to the maximum value of 120 ppm. It is further demonstrated that ZrO 2 addition incurs appreciable Si loss within the weld metal.
研究领域:
材料科学
·
焊接工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 7
·075314
·
IF 1.449
Lu Chen,Chao Xiao,Yunlu Tang,Xian Zhang,Kang Zheng,Xingyou Tian
A multilayered thermally conductive composite with ternary system of heat conductive fillers-thermally conductive films-epoxy matrix was prepared through a facile process of layer-by-layer stacking, pre-curing and hot-pressing. The thermally conductive films (boron nitride nanosheets/cellulose nanofiber) with high in-plane thermal conductivities were employed as the heat conductive medium, while the platelet-shaped hexagonal boron nitride and the particle-shaped aluminum nitride were utilized as heat conductive fillers for enhancing the perfection of the thermally conductive network. A horizontally heat conductive network was constructed within the epoxy matrix under the joint contribution of the horizontally aligned hexagonal boron nitride platelets and the parallelly spread thermally conductive films through hot-pressing. The aluminum nitride particles acted as linking points, filling the gaps between hexagonal boron nitride platelets, while constructing the thermally conductive path in the vertical direction. Thanks to the introduction of thermally conductive films and the good orientation of boron nitride platelets, the in-plane thermal conductivities of the composites increased with increasing of film layer number. With film layer number of 9, and filler content of 30 wt% (aluminum nitride/boron nitride (1:1)), the in-plane thermal conductivity of the composite was as high as 8.53 W m−1 * K, which showed an enhancement of 4165% than that of the pure epoxy matrix, and an improvement of 613% compared to that of the composite without multilayered structure. Meanwhile, the out-of-plane thermal conductivity exhibited a slightly deceased tendency as film layer number increased, but it still reached 0.87 W m−1 * K with film layer number of 9, which was 335% higher than that of the pure epoxy. In addition, the multilayered composite also possessed good thermal stability, enhanced stiffness, as well as low dielectric constant and dielectric loss, which shows a potential application in thermal management for packaging of integrated circuit and microelectronic devices.
研究领域:
材料科学
·
热管理技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2024
·
IF 5.8
Han Cheng,Bo Tang,HuaYang Bao,Fan Shan,ChunXu Lu
The phase change microcapsules (NePCMs) with high latent heat values, thermal conductivity and stability were synthesized by coating stearic acid (SA) phase change material (PCMs) with Zinc tungstate (ZnWO4) as the shell material. The prepared ZnWO4 and microcapsule samples are characterized through various techniques, and their thermophysical properties under different core-shell ratios and emulsifiers are compared. The highest phase transition enthalpy reaches 83.63 J g-1 when the core-shell ratio is 1:1 and the sodium dodecylbenzenesulfonate (SDBS) is adopted as the emulsifier. Based on SEM and TEM results, the regular spherical shape and complete core-shell structure of the microcapsule can be found, and the particle size ranges between 100-300 nm. The thermal conductivity of the SA has increased by 141.18%~238.43% after by using the ZnWO4 as the shell material. Moreover, thermogravimetric and leak-proof performance tests demonstrated that microcapsule samples possess a high thermal stability. There was no leakage from the six microcapsule samples after heating, proving their potential application for thermal energy storage (TES) under long-term high-temperature conditions. In addition, the cost of ZnWO4 prepared by this method can be reduced about 40%. According to UV absorption and fluorescence spectrum evaluation, ZnWO4 and microcapsule samples have good photoluminescence and UV absorption properties, making the sample can be widely employed in fluorescent construction, coatings and textile industries with a lower cost.
研究领域:
材料科学
·
能源工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Wei Wang,Jian Bao,Changhao Wang,Guoqiang He,Xin Wang,Diming Xu,Biaobing Jin,Zhongqi Shi,Moustafa Adel Darwish,Yawei Chen,Qixin Liang,Meirong Zhang,Di Zhou
The advancement of millimeter-wave communication desires the ceramic substrate with low permittivity ( ԑ r ) to meet the requirements of high transmission rates, low latency and wide bandwidth. However, the thermal conductivity of most low- ԑ r ceramics is too low to deal with heat dissipation in millimeter-wave applications. In this paper, we reported novel dielectric ceramics Li M SiO 4 ( M = Ga, Sc and Y) with excellent performances of low ԑ r (< 10) and high thermal conductivity (> 6 W mK −1 ). Their dielectric properties in both microwave and THz were investigated, where the LiGaSiO 4 ceramic achieved the lowest ԑ r of ∼5.2, the LiScSiO 4 ceramic presented extremely low loss ( Q × f ∼ 96,700 GHz, Q = 1/dielectric loss, f is resonant frequency), and the LiYSiO 4 ceramic showed a positive temperature coefficient of f (TCF ∼ +32 ppm °C −1 ). The distinct dielectric behavior was subsequently studied by structure-performance relationship in terms of M -site cations and bond parameters using bond valence theory, Phillips–Van Vechten–Levine chemical bond theory and so on. Moreover, a 36 GHz microstrip array antenna was designed and simulated using the LiGaSiO 4 ceramic substrate, obtaining high realized gain, high radiation efficiency and low sidelobe. The result demonstrated the great potential of LiMSiO 4 -type dielectric ceramics in millimeter-wave communications.
研究领域:
材料科学
·
电子工程
·
通信技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）