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Fe-金属有机框架玻璃的形成过程与机理

硅酸盐学报 2024年第8期52卷 2553-2558页

作者：刘鑫宇郭超慧陶海征乔昂武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070 中山市武汉理工大学先进工程技术研究院广东中山528400

不同的中心金属离子能够赋予金属有机框架材料(MOFs)不同的性能,众多Fe基MOF材料具有优异的电、磁性能。但由于Fe元素存在变价,且Fe—N配位键难以形成,可熔融成玻Fe-MOF材料鲜有报道。使用无溶剂法成功制备Fe_(3)(C_(3)H_(2)N_(2))_6(C_... 详细信息

不同的中心金属离子能够赋予金属有机框架材料(MOFs)不同的性能,众多Fe基MOF材料具有优异的电、磁性能。但由于Fe元素存在变价,且Fe—N配位键难以形成,可熔融成玻Fe-MOF材料鲜有报道。使用无溶剂法成功制备Fe_(3)(C_(3)H_(2)N_(2))_6(C_(3)H_(4)N_(2))_(2)晶体,命名为FCIR,即Fe-MOF晶体,并且利用熔融淬冷法制成了Fe-MOF玻璃,并探究该Fe-MOF晶体在加热过程中的形态和结构演变,以及其玻璃态形成的机理。结果表明:相较于以Zn为中心离子的可熔融MOF材料,Fe离子对晶体加热过程中的熔融过程和结构演变会产生较大影响;FCIR晶体熔融淬冷后发生近程序结构变化,即由晶态时Fe离子与咪唑的6配位八面体脱去2个单配位咪唑转变为玻璃态的4配位四面体。

关键词：金属有机框架玻璃形成熔融结构变化

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新玻璃家族——金属有机骨架(MOF)玻璃

硅酸盐学报 2024年第8期52卷 2543-2544页

作者：乔昂陶海征邱建荣武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070 浙江大学光电科学与工程学院杭州310027

在历史的长河中,玻璃以其独特的魅力和广泛的应用,深深地烙印在人类的生活、生产和社会发展中。它不仅仅是一种简单的物质,更是科技进步和文明发展的推动者和见证者。从17世纪开始,玻璃的大规模应用极大地推动了建筑、交通、光学、化学... 详细信息

在历史的长河中,玻璃以其独特的魅力和广泛的应用,深深地烙印在人类的生活、生产和社会发展中。它不仅仅是一种简单的物质,更是科技进步和文明发展的推动者和见证者。从17世纪开始,玻璃的大规模应用极大地推动了建筑、交通、光学、化学和天文等领域的快速发展。玻璃作为非晶态物质,考虑到其热力学非平衡态的本质,“液态为什么会形成玻璃”这一基础科学问题至今未得到充分理解。因此,“玻璃的本质”被Science杂志评选为125个最具挑战性的科学问题之一;凝聚态物理学家、诺贝尔奖得主Philip ***教授也指出“玻璃和玻璃转变的本质是凝聚态物理中最深刻也是最有趣的未解难题”。

关键词：玻璃金属有机框架制备与性能

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含锌钇铝硅酸盐玻璃的晶化特征和力学性能

硅酸盐学报 2024年第8期52卷 2495-2501页

作者：郑庆双陈胜林乔昂王觅堂陶海征武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070 上海理工大学材料与化学学院上海200093

因具有与碳化硅陶瓷相匹配的膨胀系数和良好的物化性能,钇铝硅酸盐(YAS)玻璃和玻璃陶瓷广受关注。为进一步提升YAS玻璃陶瓷的力学性能,以22Y_(2)O_(3)·19Al_(2)O_(3)·59SiO_(2)玻璃为基础,基于n(ZnO):n(Al_(2)O_(3))=2:1摩尔比,利用Z... 详细信息

因具有与碳化硅陶瓷相匹配的膨胀系数和良好的物化性能,钇铝硅酸盐(YAS)玻璃和玻璃陶瓷广受关注。为进一步提升YAS玻璃陶瓷的力学性能,以22Y_(2)O_(3)·19Al_(2)O_(3)·59SiO_(2)玻璃为基础,基于n(ZnO):n(Al_(2)O_(3))=2:1摩尔比,利用Zn O逐步替换Al_(2)O_(3),探索了系列含锌YAS玻璃的晶化特征和力学性能。通过选择合适的热处理工艺,制备了系列玻璃陶瓷。结果发现:ZnO的引入具有晶粒细化作用,随着ZnO含量的增加,析出晶粒的尺寸逐渐减小;通过合适的热处理,获得了最大断裂韧性为1.92 MPa·m^(0.5)的含锌YAS玻璃陶瓷;与原始无锌YAS玻璃陶瓷(1.16 MPa·m^(0.5))相比,提升了65%。上述工作为高性能玻璃陶瓷的研制提供了一种新的思路。

关键词：钇铝硅酸盐玻璃陶瓷断裂韧性硬度

Mixed-Alkali Effect on Thermal Property and Elastic Behavior in Borosilicate Glasses

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1017-1024页

作者： XIE Xianmao ZHOU Hemin KE Xuefei Wang Xiaowei Wang Yadan ZHang Jiayan qiao ang TAO Haizheng State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China AVIC Jonhon Optronic Technology Co.Ltd. Luoyang 471003China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan 528437China

We investigated the mixed alkali effect on the thermal properties and elastic response to temperature in the borosilicate glasses system with the composition of 70.65Si O_(2)·21.09B_(2)O_(3)·1.88Al_(2)O_(3)·(6.38-x)Li_(2)O·x Na_(2)O glasses,where x=0.00,1.595,3.19,4.785,and *** for the expected positive and negative deviations from linearity for the coefficients of thermal expansion,room temperature E and G,we observed a new mixed alkali efiect on the response of elastic moduli to *** transform infrared spectra were obtained to elucidate the possible structural origin of the mixed alkali *** work provides a valuable insight into the structural and mechanical properties of mixed-alkali borosilicate glasses.

关键词： mixed-alkali effect borosilicate glass elastic response to temperature structural origin

Constructing a stable cobalt-nitrogen-carbon air cathode from coordinatively unsaturated zeolitic-imidazole frameworks for rechargeable zinc-air batteries

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Nano Research 2022年第7期15卷 5895-5901页

作者： Tingting Wang Meng Liu Somboon Chaemchuen Jichao Wang Ye Yuan Cheng Chen ang qiao Francis Verpoort Zongkui Kou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Zeolitic-imidazole frameworks(ZIFs)derivations have widely emerged as an efficient air cathode of zinc-air batteries(ZABs)due to excellent bifunctional oxygen electrocatalysis ***,they are not stable enough for long-term operation of rechargeable ZABs because of weak association with current collector,especially under bending conditions for flexible ZAB ***,we show that by purposely designing coordinatively unsaturated ZIFs via a facile morphology regulation,which can be chemically linked on acid-treated carbon cloth,a stable Co-N-C air cathode is therefore derived where Co nanoparticles(NPs)are uniformly confined within the Co-N-C matrix on carbon cloth(Co/Co-N-C/CC).Specifically,when without being stabilized from carbon cloth,the pyrolysis of ZIFs with different unsaturated coordination levels has a negligible impact on the bifunctional oxygen-catalyzed *** optimal Co/Co-N-C/CC catalyst assembled ZAB possesses a large open circuit voltage of 1.415 V and a high peak power density of 163 mW·cm^(−2) as well as excellent cycling durability upon 630 discharge–charge cycles with 61%voltage efficiency remained,largely exceeding those of a benchmark Pt/C-IrO_(2) catalyst assembled *** synergy between Co NPs and active Co-N-C sites via electronic interaction induces the outstanding bifunctional oxygen-catalyzed activity and cathode *** present work highlights the importance of unsaturated coordination structures in ZIFs precursors for the performance of derived nanostructures in integrated electrodes.

关键词： coordinatively unsaturated zeolitic-imidazole frameworks(ZIFs) cobalt-nitrogen-carbon bifunctional air electrodes zincair battery flexible electrode

Effect of ZrO_2 Content on the Properties of Diamond Grinding Wheel Vitrified Bond

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Journal of Wuhan University of Technology(Materials Science) 2014年第1期29卷 19-22页

作者：刘小磐 qiao ang WAN Long HU Weida SONG Dongdong LI Zheng YIN Zhongjie 潘瑞琨 School of Material Science and Engineering Hunan University State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology) School of Materials Science and Engineering Hubei University

The effect of ZrO2 content on the performance of vitrified bond was discussed. The results showed that when the ZrO2 content was less than 2 mol%, Zr4＋ could enter into the glassy network as mending nets and agglomeration composition. In this case, with the increasing of ZrO2, the vitrified bond＇s bending strength increased and the expansion coefficient decreased. It was also found that the wetting angle between the vitrified bond and diamond got small because Zr4＋ was enriched on diamond surface. When ZrO2 content was more than 2 mol%, a part of ZrO2 existing in vitrified bond as ZrO2 particles played the role in nucleating agents and promoting the separation of spodttrnene. When ZrO2 content was 3 mol%, the bending strength of the vitrified bond reached its maximum of 128 MPa and the wetting angle with the diamond reached its minimum of 37.6°.

关键词： ZrO2 vitrified bond bending strength expansion coefficient wetting angle

Reversible formation-melting of nano-crystals in supercooled oxyfluoride germanate liquids

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Reversible formation-melting of nano-crystals in supercooled...

第二届全国光电材料与器件学术研讨会

作者： Hao Liu ang qiao Yongxiao Gao Haizheng Tao Xiujian Zhao Yuebo Hu Yuanzheng Yue State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Department of Chemistry and Bioscience Aalborg University School of Materials Science and Engineering Qilu University of Technology (Shandong Academy of Science) Faculty of Mechanical and Electrical Engineering Kunming University of Science and Technology

The nanocrystals play a critical role in generating and affecting functionalities of glass ***,scientists have made considerable efforts in clarifying microscopic mechanisms of nanocrystal formation in glass to obtain the desired type of ***,the phase transitions of nanocrystals during heating have not been well understood.

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湿热处理对糜子粉及淀粉理化性质的影响

中国粮油学报 2021年第11期36卷 42-48页

作者：乔昂王志伟周中凯天津科技大学食品科学与工程学院天津300457

采用糜子粉及糜子淀粉作为实验材料,研究湿热处理对不同含水量(20%~35%)样品颗粒形态、晶体结构、成糊特性、热力学特性、膨胀度、透明度等理化性质的影响。结果表明,改性后的样品颗粒发生了局部糊化,表面变得凹凸不平,晶体类型仍为A型... 详细信息

采用糜子粉及糜子淀粉作为实验材料,研究湿热处理对不同含水量(20%~35%)样品颗粒形态、晶体结构、成糊特性、热力学特性、膨胀度、透明度等理化性质的影响。结果表明,改性后的样品颗粒发生了局部糊化,表面变得凹凸不平,晶体类型仍为A型结构,但结晶度增加。湿热改性的糜子粉及淀粉的起糊温度显著提高,峰值黏度、低谷黏度、破损值及热焓值降低,膨胀度和透明度随含水量的升高而降低。这些现象说明湿热处理能够改变糜子粉及其淀粉的理化性质,为其扩大应用范围提供一定的指导。

关键词：糜子湿热处理结晶性质糊化性质热力学性质

铝硅准二元玻璃硬度和抗碎裂性演化的结构起源

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硅酸盐学报 2022年第4期50卷 894-901页

作者：丁志松王兵兵王振涛乔昂顾少轩陶海征武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070

为探究准二元铝硅玻璃硬度和抗碎裂性随组分变化的结构起源,采用激光加热气动悬浮技术,制备了组分为x Al_(2)O_(3)·(100-x)SiO_(2)(30≤x≤63,摩尔分数)的系列玻璃样品。利用显微维氏硬度仪对玻璃的硬度、抗碎裂性进行了详细表征。结... 详细信息

为探究准二元铝硅玻璃硬度和抗碎裂性随组分变化的结构起源,采用激光加热气动悬浮技术,制备了组分为x Al_(2)O_(3)·(100-x)SiO_(2)(30≤x≤63,摩尔分数)的系列玻璃样品。利用显微维氏硬度仪对玻璃的硬度、抗碎裂性进行了详细表征。结果表明:随着Al_(2)O_(3)含量增加,玻璃硬度逐渐升高,于x=63时硬度最大(8.94GPa);而玻璃的抗碎裂性随Al_(2)O_(3)含量的增加呈现非线性变化,并于x=63时出现最大的抗碎裂性(19.49 N)。结构解析发现:随着Al_(2)O_(3)含量增加,原子堆积密度和平均场键能密度的升高是导致玻璃硬度上升的原因;存在分相的玻璃中相界面可有效提升玻璃的抗碎裂性能,而单相均匀玻璃中Al含量的提升亦会明显提升玻璃的抗碎裂性,这两者之间的协同和相互竞争是准二元铝硅体系玻璃抗碎裂性出现非线性变化的结构根源。莫来石相区组分的玻璃结构类似,抗碎裂性未发生明显的变化。

关键词：铝硅酸盐玻璃气动悬浮技术硬度抗碎裂性相界面