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Fabrication and properties of non-stoichiometric Tb_(2)(Hf_(1-x)Tb_(x))_(2)O_(7-x)magneto-optical ceramics

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Journal of Advanced Ceramics 2022年第5期11卷 784-793页

作者： Lixuan ZHANG Xiaoying LI Dianjun HU Ziyu LIU Tengfei XIE Lexiang WU zhaoxiang yang Jiang LI Transparent Ceramics Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBejing 100049China

Non-stoichiometric Tb_(2)(Hf_(1-x)Tb_(x))_(2)O_(7-x)(x=-0.07-0.45)magneto-optical ceramics were fabricated by solid-state reactive sintering in vacuum combined with hot isostatic pressing(HIP)posttreatment without any sintering *** phase composition,densification process,microstructure,optical transmittance,and Verdet constant of Tb_(2)(Hf_(1-x)Tb_(x))_(2)O_(7-x)ceramics were *** in-line transmittance of(Tb_(0.93)Hf_(0.04))_(2)Hf_(2)O_(7.07)ceramics with a thickness of 2.0 mm reaches 74.6%at 1064 *** Verdet constant of Tb_(2)(Hf_(1-x)Tb_(x))_(2)O_(7-x)ceramics is-153.4,-155.8,and-181.2 rad/(T-m)at the wavelength of 633 nm when x=-0.07,0,and 0.1,*** Verdet constant increases with the increase of Tb content,and these values are higher than that of the commercial Tb_(3)Ga_(5)O_(12) crystal,indicating that non-stoichiometric Tb_(2)(Hf_(1-x)Tb_(x))_(2)O_(7-x)ceramics have a great potential for the application in Faraday isolators.

关键词： magneto-optical ceramics Tb_(2)(Hf_(1-x)Tb_(x))_(2)O_(7-x)ceramics reactive sintering Verdet constant

Fabrication,microstructures,and optical properties of Yb:Lu_(2)O_(3) laser ceramics from co-precipitated nano-powders

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Journal of Advanced Ceramics 2020年第6期9卷 674-682页

作者： Ziyu LIU Guido TOCI Angela PIRRI Barbara PATRIZI Yagang FENG Jiabei WEI Feng WU zhaoxiang yang Matteo VANNINI Jiang LI Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Istituto Nazionale di Ottica Consiglio Nazionale delle RicercheCNR-INOSesto Fiorentino(Fi)50019Italy Istituto di Fisica Applicata“N.Carrara” Consiglio Nazionale delle RicercheCNR-IFACSesto Fiorentino(Fi)50019Italy School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013China

The Yb:Lu_(2)O_(3)precursor made up of spherical particles was synthesized through the co-precipitation method in the water/ethanol *** 5 at% Yb:Lu_(2)O_(3)powder is in the cubic phase after calcination at 1100℃ for 4 *** powder also consists of spherical nanoparticles with the average particle and grain sizes of 96 and 49 nm,*** average grain size of the pre-sintered ceramic sample is 526 nm and that of the sample by hot isostatic pressing grows to 612 *** 1.0 mm-thick sample has an in-line transmittance of 81.6%(theoretical value of 82.2%)at 1100 *** largest absorption cross-section at 976 nm is 0.96×1^(0-20)cm^(2) with the emission cross-section at 1033 nm of 0.92×10^(-20)cm^(2) and the gain cross sections are calculated with the smallest population inversion parameter β of *** highest slope efficiency of 68.7% with the optical efficiency of 65.1% is obtained at 1033.3 nm in quasi-continuous wave(QCW)*** the case of continuous wave(CW)pumping,the highest slope efficiency is 61.0% with the optical efficiency of 54.1%.The obtained laser performance indicates that Yb:Lu_(2)O_(3)ceramics have excellent resistance to thermal load stresses,which shows great potential in high-power solid-state laser applications.

关键词： Yb:Lu_(2)O_(3)transparent ceramics co-precipitated nano-powder spectroscopic properties laser performance hot isostatic pressing

Preparation and evaluation of sustained-release solid dispersions co-loading gastrodin with borneol as an oral brain-targeting enhancer

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Acta Pharmaceutica Sinica B 2014年第1期4卷 86-93页

作者： Zheng Cai Xiaolu Lei Zhufen Lin Jie Zhao Feizhen Wu zhaoxiang yang Junxue Pu Zhongqiu Liu School of Pharmaceutical Sciences Southern Medical UniversityGuangzhou 510515China Institute of Pharmaceutical Research Kunming Pharmaceutical Co.Kunming 650100China International Institute for Translational Chinese Medicine Guangzhou University of Chinese MedicineGuangzhou 510006China

Borneol is a traditional Chinese medicine that can promote drug absorption from the gastrointestinal tract and distribution to the ***,stomach irritation may occur when high doses of borneol are *** the present work,gastrodin,the main bioactive ingredient of the traditional Chinese drug“Tianma”(Rhizoma Gastrodiae)was used as a model drug to explore reasonable application of ***-release solid dispersions(SRSDs)for co-loading gastrodin and borneol were prepared using ethylcellulose as a sustained release matrix and hydroxy-propyl methylcellulose as a *** dispersion state of drug within the SRSDs was analyzed by using scanning electron microscopy,differential scanning calorimetry,and powder X-ray *** results indicated that both gastrodin and borneol were molecularly dispersed in an amorphous *** of in vitro drug release demonstrated that the dissolution profiles of gastrodin and borneol from the SRSDs both fitted the Higuchi ***,gastric mucosa irritation and the brain targeting of the SRSDs were *** with the free mixture of gastrodin and borneol,brain targeting of SRSDs was slightly weaker(brain targeting index:1.83 vs.2.09),but stomach irritation obviously ***-release technology can be used to reduce stomach irritation caused by borneol while preserving sufficient transport capacity for oral brain-targeting drug delivery.

关键词： Borneol Gastrodin Oral drug delivery Brain-targeting Gastric mucosa irritation Sustained-release

Fabrication and performance evaluation of novel transparent ceramics RE:Tb_(3)Ga_(5)O_(12)(RE=Pr,Tm,Dy)toward magneto-optical application

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Journal of Advanced Ceramics 2021年第2期10卷 271-278页

作者： Xiaoying Li Ilya LSnetkov Aleksey Yakovlev Qiang Liu Xin Liu Ziyu Liu Penghui Chen Danyang Zhu Lexiang Wu zhaoxiang yang Tengfei Xie Haohong Chen Oleg Palashov Jiang Li Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Institute of Applied Physics of the Russian Academy of Sciences Nizhny Novgorod603950Russia School of Material Science and Engineering Jiangsu UniversityZhenjiang212013China

Transparent ceramics are at the heart of modern magneto-optical materials providing promising opportunities for Faraday isolators.1.0 at%RE:Tb3Ga5O12(rare earth(RE)=Pr,Tm,Dy)transparent ceramics were successfully prepared by air sintering and sequential HIP technique using the coprecipitated powders as the raw *** the powders have shown to be a pure cubic terbium gallium garnet(TGG)phase and exhibit good ***,a change could not be observed in particle shape with the different doped *** the two-step sintering,all the obtained ceramics have good optical quality,and the in-line transmittances at 1070 nm are higher than 80%.Moreover,no secondary phase can be detected from the ***,the pores which remain entrapped in the ceramics can be *** Verdet constant of ceramic samples is optimized by RE doping,and the Verdet constant at 632.8 nm is about−143 rad·T^(−1)·m^(−1),which is about 5%higher than that of TGG ***,the thermo-optical properties of 1.0 at%RE:TGG transparent ceramics are *** annealed TGG ceramic showed the best thermo-optical properties,and the thermally induced depolarization of 1.0 at%Ce:TGG and 1.0 at%Tm:TGG was inferior to that of annealed TGG ceramic.

关键词： magneto-optical material rare earth(RE) terbium gallium garnet(TGG)ceramics Verdet constant thermo-optical properties

瑞典球团矿在软熔过程中的显微结构变化及其对软熔性能的影响

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钢铁 1986年第8期21卷 5-13页

作者：杨兆祥东北工学院

利用显微镜和电子探针测定了淬冷球团试样的显微结构和相成分。普通酸性球团在还原加热过程中由于浮士体与酸性渣作用,生成较多的低熔点渣相,降低了软熔性能。酸性氧化镁球团因形成氧化镁浮士体和提高了渣相中 MgO/SiO2比而明显地改善... 详细信息

利用显微镜和电子探针测定了淬冷球团试样的显微结构和相成分。普通酸性球团在还原加热过程中由于浮士体与酸性渣作用,生成较多的低熔点渣相,降低了软熔性能。酸性氧化镁球团因形成氧化镁浮士体和提高了渣相中 MgO/SiO2比而明显地改善了软熔性能。低 SiO2高碱度氧化镁球团因渣量少和形成氧化镁浮士体而使软熔性能大大改善。对影响浮士体中氧化镁量和渣相中MgO/SiO2比的因素进行了详细的分析。

关键词：球团矿渣相金属铁 MgO 熔点人造富矿熔解温度浮士体软熔性能显微结构瑞典北欧

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含氟高炉型炉渣中碱金属还原动力学的研究

钢铁 1981年第9期16卷 18-25页

作者：杨兆祥段振瀛东北工学院

本文利用二次回归正交设计方法设计了试验方案。研究了含氟高炉渣中碱金属还原动力学。试验结果指出,增加炉渣碱度,提高温度和渣中CaF2含量可以加速碱金属还原速度。得出计算在不同碱度,炉渣温度和CaF2含量条件下氧化钾还原反应速度常... 详细信息

本文利用二次回归正交设计方法设计了试验方案。研究了含氟高炉渣中碱金属还原动力学。试验结果指出,增加炉渣碱度,提高温度和渣中CaF2含量可以加速碱金属还原速度。得出计算在不同碱度,炉渣温度和CaF2含量条件下氧化钾还原反应速度常数的回归方程。还原是一级反应,处于化学动力学控制范围。其表观活化能在35.9～122.8kcal/mol之间,它随炉渣碱度和 CaF2含量的降低而增加。在条件相同时,氧化钾的还原速度是氧化钠的8.8倍,建议用（K2O+0.113Na2O）kg/t来表示总碱负荷。在实验研究的基础上,建立了在实际操作中可以应用的计算控制炉内碱金属循环积蓄的数学统计模型。

关键词：碱度炉内表观活化能炉渣成分含氟碱金属高炉还原动力学

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船舶水下减阻抗污涂层的研究进展

化学通报 2022年第8期85卷 937-942页

作者：杨永嘉杨兆祥贺泳霖中国人民大学化学系北京100872

船舶由于在航行时受到各种阻力,消耗了大量能量,增加了航行成本。船舶水下阻力的来源可以大致分为船体阻力和生物质附加阻力。本文基于对阻力和生物质黏附形成过程的分析,介绍了水下减阻领域的进展突破,总结了具有减阻、抗污性质的涂层... 详细信息

船舶由于在航行时受到各种阻力,消耗了大量能量,增加了航行成本。船舶水下阻力的来源可以大致分为船体阻力和生物质附加阻力。本文基于对阻力和生物质黏附形成过程的分析,介绍了水下减阻领域的进展突破,总结了具有减阻、抗污性质的涂层研究情况,就超疏水、超亲水减阻材料和自抛光防污涂料、低表面能抗黏附材料、防污剂等方面相关的科学问题和解决方法进行了综述。

关键词：减阻生物质黏附自抛光表面浸润性质

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2,3,4-三甲氧基苯甲酸的合成

中国医药工业杂志 2012年第2期43卷 90-91页

作者：周荣光王金杨兆祥杨波昆明制药集团股份有限公司药物研究院云南昆明650100 昆明理工大学生命科学与技术学院云南昆明650224

焦性没食子酸经碳酸二甲酯甲基化,再经Blanc氯甲基化反应制得2,3,4-三甲氧基氯苄,最后在氢氧化钠和溴化四丁铵催化下经高锰酸钾氧化得到2,3,4-三甲氧基苯甲酸,总收率约63%。

关键词： 2,3,4-三甲氧基苯甲酸 Blanc氯甲基化反应中间体合成

光伏发电直流接入与消纳的方案设计和工程实践

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中国电力 2019年第10期52卷 108-114页

作者：杨朝翔李红建陈蕾陈翔宇国网冀北电力有限公司经济技术研究院

随着柔性直流技术的发展,配电网领域源-网-荷的构建方式更加丰富,可实现集中式光伏直流并网、数据中心直流供电等新型电网模式。依托张北交直流配电网及柔性变电站示范工程,介绍光伏发电站直流并网方案以及工程实施途径,同时,设计了数... 详细信息

随着柔性直流技术的发展,配电网领域源-网-荷的构建方式更加丰富,可实现集中式光伏直流并网、数据中心直流供电等新型电网模式。依托张北交直流配电网及柔性变电站示范工程,介绍光伏发电站直流并网方案以及工程实施途径,同时,设计了数据中心直流供电的接线方式,计算了供电可靠性。在此基础上,对比直流配电网和传统交流配电网,从电能传输效率、供电可靠性、电能质量等方面体现了直流配电网的优势。示范工程实现了光伏发电直流接入与消纳,设计成果和实践经验可为同类工程提供参考。

关键词：直流配电网光伏直流并网直流供电传输效率