Crystal Research and Technology最新文献_第6页

High Broadband Optical Absorption and Bandstop Filter Characteristics of Pb/Nb2O5 Interfaces Pb/Nb2O5 界面的高宽带光吸收和带阻滤波器特性

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-08-06 DOI: 10.1002/crat.202400136

Sabah. E. Algarni, Atef F. Qasrawi, Najla. M. Khusayfan

{"title":"High Broadband Optical Absorption and Bandstop Filter Characteristics of Pb/Nb2O5 Interfaces","authors":"Sabah. E. Algarni, Atef F. Qasrawi, Najla. M. Khusayfan","doi":"10.1002/crat.202400136","DOIUrl":"10.1002/crat.202400136","url":null,"abstract":"In this study, semitransparent lead films serve as substrates for depositing niobium pentoxide thin films, forming versatile electro-optical devices. Using vacuum evaporation and ion sputtering techniques at ≈10−5 mbar, stacked layers of crystalline Pb and amorphous Nb2O5 are created. This process reduces free carrier absorption in Nb2O5 and forms Urbach tail states with a width of 0.91 eV. Pb/Nb2O5 thin films exhibit remarkable broadband absorption, exceeding 440% in the visible and 98% in the infrared. Moreover, Pb substrates induce a redshift in Nb2O5’s energy bandgap. Electrical analysis using impedance spectroscopy on Pb/Nb2O5/Ag structures reveals their series/parallel resonance and bandstop filter properties. Notably, the bandstop filters exhibit reflection coefficient minima at a notch frequency of 1.66 GHz, with a bandwidth of 280 MHz, return loss of 26 dB, and voltage standing wave ratio of 1.13. These findings underscore the device's potential for wide-ranging electro-optical applications across the electromagnetic spectrum.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"59 9","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

(Crystal Research and Technology 8/2024) (水晶研究与技术 8/2024）

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-08-03 DOI: 10.1002/crat.202470039

引用次数: 0

Crystallization Behavior of Co-Doped Amorphous Manganese Dioxide and Its Cathode Performance for Aqueous Zinc Ion Batteries 共掺杂无定形二氧化锰的结晶行为及其在锌离子水电池中的阴极性能

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-08-03 DOI: 10.1002/crat.202400029

Yana Liu, Fangxia Zhao, Haoyi Chen, Xingfeng Tang, Zhenzhong Zhang, Chengyang Gu, Hong Chang

{"title":"Crystallization Behavior of Co-Doped Amorphous Manganese Dioxide and Its Cathode Performance for Aqueous Zinc Ion Batteries","authors":"Yana Liu, Fangxia Zhao, Haoyi Chen, Xingfeng Tang, Zhenzhong Zhang, Chengyang Gu, Hong Chang","doi":"10.1002/crat.202400029","DOIUrl":"10.1002/crat.202400029","url":null,"abstract":"In order to explore the crystallization behavior of Co-doped amorphous manganese dioxide(Co-doped AMO) and to investigate the electrochemical properties of its different crystallization products as cathodes for aqueous zinc ion batteries. In this work, the effects of heat treatment temperature on the microstructure and phase composition of Co-doped AMO and their electrochemical properties of Zn-MnO2 battery cathode materials are systematically investigated. The results show that Co-doping increases the crystallization temperature of pure AMO. When the heat treatment temperature is 400 °C, Co-doped AMO is amorphous. At 500 and 550 °C, part of the Co-doped AMO crystallizes into tetragonal spinel structured (Co, Mn)(Co, Mn)2O4 material between MnCo2O4 and Mn3O4. At 650 °C, the crystallized product is completely nano-α-Mn(Co)O2 crystal. The maximum discharge specific capacities and the retention rate after 100 cycles of the samples at 100 mA g−1 are 325.40 mAh g−1, 86.88%; 217.00 mAh g−1, 13.94%; 186.68 mAh g−1, 41.01%; and 149.03 mAh g−1, 31.27% for the unheated and 400, 550, 650 °C heat-treated samples, respectively. It is proved that the Co-doped AMO without heat treatment is superior to the partially or fully crystallized materials in terms of comprehensive performance and cost as cathode materials for AZIB.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"59 9","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Masthead: Crystal Research and Technology 8'2024 刊头：水晶研究与技术 8'2024

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-08-03 DOI: 10.1002/crat.202470040

引用次数: 0

The Growth Mechanism of Layered Hexagonal Boron Nitride Crystal on Copper Foil 层状六方氮化硼晶体在铜箔上的生长机理

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-07-29 DOI: 10.1002/crat.202400013

Xia Lei, Guangcun Gao, Jieqiong Wang

引用次数: 0

Acoustic Shock-Induced Low Dielectric Loss in Glycine and Oxalic Acid-Based Single Crystals 声震诱导甘氨酸和草酸基单晶的低介电损耗

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-07-19 DOI: 10.1002/crat.202400090

Deepa Muniraj, Raju Suresh Kumar, Abdulrahman I. Almansour, Ikhyun Kim, S. A. Martin Britto Dhas

{"title":"Acoustic Shock-Induced Low Dielectric Loss in Glycine and Oxalic Acid-Based Single Crystals","authors":"Deepa Muniraj, Raju Suresh Kumar, Abdulrahman I. Almansour, Ikhyun Kim, S. A. Martin Britto Dhas","doi":"10.1002/crat.202400090","DOIUrl":"10.1002/crat.202400090","url":null,"abstract":"Glycinium oxalate (GO) and Bis(glycinium) oxalate (BGO) crystals are successfully grown using the slow evaporation solution growth technique. Following their growth, the crystals are subjected to a series of acoustic shock pulses. The effects of these shock pulses on the structural, optical, dielectric, and morphological properties of the crystals are comprehensively analyzed using various characterization techniques, including powder X-ray diffraction (XRD), UV-Visible spectroscopy, dielectric spectroscopy, and optical microscopy. Structural analysis through XRD reveals shifts in diffraction peak positions, indicating structural deformations. Fourier transform infrared spectroscopy analysis assesses the chemical stability of GO and BGO under shocked conditions. UV-Visible spectroscopy shows alterations in optical transmission with successive shock pulses, attributed to structural and surface defects. Dielectric properties are investigated over a frequency range from 1 Hz to 1 MHz, revealing variations in dielectric constant and loss tangent, which provide insights into the electrical behavior of the materials under normal and shocked conditions. Optical and scanning electron microscopy examine surface morphology, visualizing defects induced by the shock pulses. This study highlights the significant impact of shock pulses on the structural properties, optical transmission, dielectric properties, and surface morphology of GO and BGO crystals, offering valuable information on their resilience under dynamic conditions and potential applications.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"59 9","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141744507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NH4Y(SO4)2·H2O and NH4YSO4F2: Two New Ammonium-Rare Earth Metal Sulfates with Enhanced Optical Anisotropy and Deep Ultraviolet Transmission NH4Y(SO4)2-H2O 和 NH4YSO4F2: 两种具有增强光学各向异性和深紫外透射率的新型铵稀土金属硫酸盐

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-07-19 DOI: 10.1002/crat.202400072

Luyong Zhang, Shibin Wang, Zhencheng Wu, Xueling Hou, Zhihua Yang, Fangfang Zhang, Shilie Pan

{"title":"NH4Y(SO4)2·H2O and NH4YSO4F2: Two New Ammonium-Rare Earth Metal Sulfates with Enhanced Optical Anisotropy and Deep Ultraviolet Transmission","authors":"Luyong Zhang, Shibin Wang, Zhencheng Wu, Xueling Hou, Zhihua Yang, Fangfang Zhang, Shilie Pan","doi":"10.1002/crat.202400072","DOIUrl":"10.1002/crat.202400072","url":null,"abstract":"Tetrahedral oxygenated groups with large highest occupied molecular orbital-lowest unoccupied molecular orbital (H gaps such as [SO4] are beneficial for deep ultraviolet (DUV) transmission but usually make against generating sufficient birefringence due to the small polarizability anisotropy. Thus, it is extremely difficult to obtain DUV transmission and large birefringence simultaneously in the search for DUV birefringent materials in sulfates. Herein, two new ammonium-rare earth metal sulfates, NH4Y(SO4)2·H2O and NH4YSO4F2, with DUV transmission are presented. Meanwhile, both exhibit greatly elevated birefringence through the involvement of NH4+ units, compared to Y2(SO4)3·8H2O. Their optical properties are further investigated by theoretical calculations, and the effect of the introduction of NH4+ into yttrium sulfate on optimizing the structures and properties is discussed. This work may provide a new perspective for further exploration of DUV birefringent materials in tetrahedral oxygenated group sulfates.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"59 9","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141744510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing Seed-Induced Nucleation for Enhanced Al(OH)3 Crystal Precipitation from Supersaturated Potassium Aluminate Solution 优化种子诱导成核，从过饱和铝酸钾溶液中沉淀出更多 Al(OH)3 晶体

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-07-16 DOI: 10.1002/crat.202400086

Chenglin Liu, Jin Xue, Xiaoning Fang, Mengjie Luo

{"title":"Optimizing Seed-Induced Nucleation for Enhanced Al(OH)3 Crystal Precipitation from Supersaturated Potassium Aluminate Solution","authors":"Chenglin Liu, Jin Xue, Xiaoning Fang, Mengjie Luo","doi":"10.1002/crat.202400086","DOIUrl":"10.1002/crat.202400086","url":null,"abstract":"Potassium alunite is a potential mineral resource of potassium and aluminum that can serve as a valuable resource. An effective potassium and aluminum recovery method is developed using gradient leaching with a KOH sub-molten salt. The key part of this process is seeded precipitation of the potassium aluminate leach solution. Therefore, this study aims to optimize the seeded precipitation process by investigating the effects of alkali concentration, molecular ratio, stirring rate, temperature, and seed coefficient on the precipitation ratio and particle size of Al(OH)3. The results show that alkali concentration, molecular ratio, temperature, and seed coefficient are key factors influencing seeded precipitation. Furthermore, the process is optimized by using these four identified factors as variables. A 9L(34) orthogonal experiment determines optimal conditions for maximizing the precipitation ratio and achieves the desired average particle size. Under the optimal condition of 200 g L−1 alkali concentration, 1.5 molecular ratio, 1.0 seed coefficient, and 343.15 K temperature, the precipitation ratio reaches 54% and the average Al(OH)3 particle size is 114 µm. Further work is required to scale up this optimized seeded precipitation process and evaluate applications of the Al(OH)3 product.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"59 8","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141643191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growth and Optical Properties of Yellow Luminescent [Epy]2[CuBr3] Single Crystals Based on Self Trapping States 基于自捕获态的黄色发光 [Epy]2[CuBr3]单晶的生长和光学特性

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-07-10 DOI: 10.1002/crat.202400012

Xinxin Chen, Shujun Zhu, Jiali Han, Tao Zhao, Jianguo Pan, Shangke Pan

引用次数: 0

Masthead: Crystal Research and Technology 7'2024 刊头：水晶研究与技术 7'2024

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-07-07 DOI: 10.1002/crat.202470038

引用次数: 0