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Optimized sintering and mechanical properties of Y-TZP ceramics for dental restorations by adding lithium disilicate glass ceramics

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Journal of Advanced Ceramics 2021年第6期10卷 1326-1337页

作者： Ke LI jiancun rao Congqin NING State Key Laboratory of High Performance Ceramics and Superfine Micro structure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China AIM Lab Maryland NanoCenterUniversity of MarylandCollege ParkMD 20742USA The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Normal UniversityShanghai 200234China

The novel dental ceramics can be fabricated at lower temperatures when sol-gel derived lithium disilicate glass ceramics(LDGC)was used as an additive for yttria stabilized tetragonal zirconia polycrystalline(Y-TZP)*** effect of LDGC on the sintering,mechanical,and translucent properties of Y-TZP ceramics was investigated in the present *** results showed that the LDGC additive effectively improved the densification of Y-TZP at 1100℃,which was much lower than the sintering temperature for pure *** sintered at 1100℃,the Y-TZP with 1 wt%LDGC reached a relative density of 95.45%,and prossessed a flexural strength of 482.4 MPa and a fracture toughness of 5.94 ***,its translucency was also ***,the addition of LDGC could result in an escape of yttrium atoms from the grain lattice of zirconia,which induced the tetragonal-monoclinic transformation of zirconia and abnormal growth of monoclinic *** escaped yttrium atoms diffused into the intergranular glass *** results indicated that the novel Y-TZP-LDGC ceramics has a great potential to be used for all-ceramic restorations.

关键词： yttria stabilized tetragonal zirconia polycrystalline(Y-TZP) lithium disilicate glass ceramics(LDGC) sintering mechanical properties dental restoration

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Effect of Different Rare-Earth on Microstructure and Properties of α-Sialon Ceramics

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Journal of Materials Science & Technology 2008年第6期24卷 878-882页

作者： Chunfeng LIU Feng YE Yu ZHOU Yongliang WANG jiancun rao Institute for Advanced Ceramics Harbin Institute of Technology Harbin 150001 China

Densified Yb-, Y-, Dy-, Sin- and Nd-α-Sialon ceramics were prepared by two-step hot sintering. The variation of microstructure and properties with different rare-earth was investigated. The ceramics doped with smaller cations （Yb3＋, y3＋ and Dy3＋） are fully composed of α-Sialon, while in the larger cations （Sm3＋ and Nd3＋） doped ceramics also exist a few intergranular phase Mt （Re2Si3-xAlxO3＋xN4-x） in triple-point pockets. With increasing the radius of the rare-earth cations, the elongated α-Sialon grains form instead of the equiaxed grains in Yb-α-Sialon, and the aspect ratio of grains increases. All the ceramics possess high hardness, and the value of 21 GPa is achieved for Yb- and Y-α-Sialon. With increasing the ionic size of rare-earth, the hardness decreases slightly but the toughness tends to increase. Nd-α-Sialon possesses the highest toughness with the value of 5.4 MPa·m^1/2.

关键词： α-Sialon Rare-earth Microstructure Mechanical properties

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Transition metal on topological chiral semimetal PdGa with tailored hydrogen adsorption and reduction

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npj Computational Materials 2021年第1期7卷 1933-1940页

作者： Qun Yang Guowei Li Yudi Zhang Jian Liu jiancun rao Thomas Heine Claudia Felser Yan Sun Max Planck Institute for Chemical Physics of Solids 01187 DresdenGermany CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences 19 A Yuquan RdShijingshan DistrictBeijing 100049China AIM Lab Maryland NanoCenterUniversity of MarylandCollege ParkMD 20742USA Faculty of Chemistry and Food Chemistry Technische Universität Dresden01069 DresdenGermany

The difficulties in designing high-performance hydrogen evolution reaction(HER)catalysts lie in the manipulation of adsorption behaviors of transition metals(TMs).Topological chiral semimetals with super-long Fermi arc surface states provide an ideal platform for engineering the catalytic performance of TMs through the metal-support *** found the adsorption trends of TMs can be modified significantly when deposited at the surface of the PdGa chiral *** electron transfer from the TMs to the surface states of the PdGa reshapes the d band structure of TMs and weakens the hydrogen intermediate ***,W/PdGa is expected to be a good HER catalyst with close to zero Gibbs free ***,we found a Pt-like exchange current density and tumover frequency when depositing W atoms at the PdGa nanostructures *** findings provide a way to develop high-efficient electrocatalysts by the interplay between topological surface states and metal-support interaction.

关键词： interaction surface adsorption

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Preparation and Characterization of BAS Reinforced with SiC Platelets

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Journal of Materials Science & Technology 2000年第5期16卷 481-485页

作者： jiancun rao+, Jiancheng GU, Yu ZHOU, Feng YE and Tingquan LEI (Harbin Institute of Technology, Harbin 150001, China) Harbin Institute of Technology Harbin 150001 China

BAS glass-ceramic powders were prepared by sol-gel processing. SiC platelets reinforced BAS glass-ceramic matrix composites with high density and uniform microstructure could be made using hot-pressing method. The related processing parameters were studied in this work, including effects of additional seed on transformation from H to M of barium aluminosilicate. DTA method was used to determine exact time to press mixture powders during hot-pressing for the purpose of effective densification. Microstructure and mechanical properties of the composites were investigated by mean of SEM, XRD and TEM techniques as well as three points bending test and single edge notched beam measurement. The results showed that the flexural strength and fracture toughness value of the BAS glass-ceramic matrix composites could be effectively improved by the addition of the SiC platelets. But the relative densities of composites were slightly decreased. The main toughening mechanism is crack deflection, platelets' pull-out and bridging. The increased value of flexural strength is contributed to the load transition effect from matrix to SiC platelets.

关键词： BAS Preparation and Characterization of BAS Reinforced with SiC Platelets SiC

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涂层硼酸铝晶须对铝基复合材料界面与力学性能的影响

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金属学报 2000年第1期36卷 109-112页

作者：丁冬雁孟庆昌王德尊姚忠凯饶建存李斗星哈尔滨工业大学材料科学与工程学院哈尔滨150001 中国科学院金属研究所沈阳110015

采用溶胶－凝胶氧化铝涂覆硼酸铝晶须方法改善挤压铸造晶须增强６０６１Ａｌ复合材料的界面性能．对复合材料的界面观察表明． γ—Ａｌ_２Ｏ_３和 α－Ａｌ_２Ｏ_３涂层均可抑制尖晶石界面反应，而且涂层较厚时涂层效果明显．界面反... 详细信息

采用溶胶－凝胶氧化铝涂覆硼酸铝晶须方法改善挤压铸造晶须增强６０６１Ａｌ复合材料的界面性能．对复合材料的界面观察表明． γ—Ａｌ_２Ｏ_３和 α－Ａｌ_２Ｏ_３涂层均可抑制尖晶石界面反应，而且涂层较厚时涂层效果明显．界面反应程度的差异也影响复合材料的弯曲性能和时效行为．界面反应越轻微，则复合材料的弹性模量越大、峰时效过程由于基体中Ｍｇ的较少消耗而推迟．涂层复合材料的弯曲断裂以晶须拔出为主，而无涂层复合材料的弯曲断裂以近界面基体断裂为主．与γ－Ａｌ_２Ｏ_３涂层相比。

关键词：铝基复合材料晶须氧化铝涂层力学性能

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《应急药事管理标准》制订与解析

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医药导报 2024年第7期43卷 1070-1074页

作者：饶晶晶甄健存张威梅丹缪丽燕钟明康高申赵荣生战寒秋首都医科大学附属北京积水潭医院药学部北京100035 中国医院协会药事专业委员会北京100035 中国医学科学院北京协和医学院北京协和医院药剂科北京100730 苏州大学附属第一医院药学部苏州215006 复旦大学附属华山医院药剂科上海200040 海军军医大学第一附属医院药学部上海200433 北京大学第三医院药剂科北京100191 首都医科大学附属北京地坛医院药学部北京100015

医疗机构药学部门在突发事件应急工作中承担着重要职责。《应急药事管理标准》以科学性、通用性、指导性和可操作性为编写原则,通过问题梳理、意见征集及专家论证而形成。该标准从应急机制、应急保障、应急服务3个方面对9个关键要素49... 详细信息

医疗机构药学部门在突发事件应急工作中承担着重要职责。《应急药事管理标准》以科学性、通用性、指导性和可操作性为编写原则,通过问题梳理、意见征集及专家论证而形成。该标准从应急机制、应急保障、应急服务3个方面对9个关键要素49条标准进行了规范。该文主要介绍《应急药事管理标准》的制订方法和过程,并对内容进行解析,以期为提高医疗机构药学部门应对突发事件的应急能力提供指导。

关键词：应急药事管理管理标准标准解析

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Development of Space Environment Research and Service in China

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空间科学学报 2010年第5期30卷 464-467页

作者： Gong jiancun Liu Siqing Shi Liqin Hu Xiong Lin Kexin Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100190

During the past two years,space environment has achieved great development in space environment monitoring,model research,system developing and space environment service in *** this paper,we mainly introduce space environment safety support for Shenzhou-7 manned spacecraft,two typical space environment operation platforms,and the advance of Re-locatable Atmospheric Observatory(rao).At the last part of this paper,the Sub-committee on Space Environment(SSE) which was set up in 2009 under the Technical Committee on Space Technology and Operation of Standardization Administration of China is briefly introduced.

关键词：空间环境监测中国服务技术委员会载人飞船安全保障经营管理空间技术

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Advances in Research and Service of Space Environment in China

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空间科学学报 2008年第5期28卷 492-495页

作者： SHI Liqin GONG jiancun LIU Siqing HU Xiong LIU Jing HUANG Wengeng Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100190

This paper presents the recent progress of space environment research and service in *** the past two years,many models of space environment forecast and analysis methods of space environment effects have been developed for tailored space environment service for Chinese space mission.A new Re-locatable Atmospheric Observatory(rao) for monitoring atmospheric wind,temperature,density and pressure of the near space from 20km up to 120km altitudes is being *** space environment service space environment safety was provided to ensure the safety of CE-1 for its launch and operation in 2007.

关键词：中国空间研究空间环境分析方法

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临床药师参与1例甲型血友病患者围术期用药的药学监护

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中国临床药学杂志 2023年第1期32卷 63-65页

作者：武丹威任爽李瀛旭赖良鹏吴倚天饶晶晶甄健存北京积水潭医院药学部北京100035 北京积水潭医院足踝外科北京100035

报道1例行踝关节镜甲型血友病患者的病例。患者男性,39岁,因“左踝关节外伤20年,疼痛活动受限加重10年”入院,诊断为关节炎(左踝创伤性),滑膜良性肿瘤(左踝骨软骨瘤),拟行左踝关节镜下探查、清理术。临床药师结合患者情况,对患者围术期... 详细信息

报道1例行踝关节镜甲型血友病患者的病例。患者男性,39岁,因“左踝关节外伤20年,疼痛活动受限加重10年”入院,诊断为关节炎(左踝创伤性),滑膜良性肿瘤(左踝骨软骨瘤),拟行左踝关节镜下探查、清理术。临床药师结合患者情况,对患者围术期凝血因子Ⅷ补充、止血、镇痛和手术预防用药方案提出建议,使患者围术期得到平稳过渡,伤口愈合良好。

关键词：临床药师血友病踝关节镜围术期用药

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