检索结果-南通市图书馆

Particuology 2009年第5期7卷 414-418页

作者： Yonghui Xing Hui Liang Xiaolei Li Liuqi Si Key LaboratoryforAdvanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin 300072 China shandong Sinocera Functional Material Co. ltd.. shandong Dongying 257091 China

BSTO dielectric ceramic was prepared from SrTi03 and BaTi03 powders synthesized by hydrothermal method, as well as from ***.4TiO3 powder synthesized by conventional solid-state reaction. The former can be sintered at a relatively low temperature of 1120 ℃. Characterization by SEM showed that the grain shapes of both ceramics are cubical, though the grain size of the former is much smaller. Dielectric constants measured at 20℃ were shown to vary with frequency in the range from I kHz to 2 MHz and dc bias field, and further that the dielectric loss of the former to be less than 2 × 10^- 3 in the frequency range of 20 kHz to 1 MHz, much smaller than that of the latter sample. For the former, temperature dependence of dielectric constant is much flatter and there exists an extended phase transition diffusion covering a wide temperature range of Curie temperature To. The smaller grain size of the former depresses the dc bias electrical field dependence of dielectric constant. The tunability is 7% under a bias field of 0.6 kV/mm dc.

关键词： Hydrothermal method SrTiO3 BaTiO3 Dielectric properties

Review on regulation of MnS in non-qquenched and tempered steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第4期31卷 779-789页

作者： Guo-xing Qiu Qing Du Feng Lu De-jun Miao Yong-kun Yang Xiao-ming Li School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055ShaanxiChina Laigang Technique Center Shandong Iron and Steel Group Co.Ltd.Jinan 271104ShandongChina

An overview of the current research status and control methods of MnS in non-quenched and tempered steel was *** a low-melting plastic inclusion,the morphology and distribution of MnS were influenced by various production ***,control of MnS is a systematic problem that must be integrated into the entire production *** on the production process,the factors affecting the morphology and distribution of MnS in steel were *** effects of oxygen activity,manganese,sulfur,and some alloys on MnS inclusion precipitation were summarized,mainly including MnS modification treatment and oxygen-sulfide composite precipitation *** is believed that MnS precipitates during the solidification process of steel,and controlling the solidification cooling rate could effectively regulate the size and morphology of MnS,avoiding the precipitation of ***,by changing the deformation rate,deformation amount,deformation temperature during the hot deformation process,and heating time and temperature during heat treatment,the distribution and morphology of MnS could be *** the fine control of the above process parameters,the number of II-MnS in steel could be effectively reduced,and their morphology could be improved,thereby enhancing the performance of non-quenched and tempered steel and promoting its wider ***,applying laboratory research results to industrial production is an important direction for future research efforts in this field.

关键词： MnS Non-quenched and tempered steel Control technology Process parameter Morphology Distribution

Ameliorating the interfacial issues of all-solid-state lithium metal batteries by constructing polymer/inorganic composite electrolyte

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第7期30卷 85-93页

作者： Su Wang Qifang Sun Wenxiu Peng Yue Ma Ying Zhou Dawei Song Hongzhou Zhang Xixi Shi Chunliang Li Lianqi Zhang Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China shandong Ruifu Lithium Co. LtdTaian 271601ShandongChina

Lithium metal is one of the most promising anodes for next-generation batteries due to its high capacity and low reduction ***,the notorious Li dendrites can cause the short life span and safety issues,hindering the extensive application of lithium ***,Li_(7)La_(3)Zr_(2)O_(12)(LLZO)ceramics are integrated into polyethylene oxide(PEO)to construct a facile polymer/inorganic composite solid-state electrolyte(CSSE)to inhibit the growth of Li dendrites and widen the electrochemical stability *** the feasibility of our strategy,the designed PEO-LLZO-LiTFSI composite solid-state electrolyte(PLLCSSE)exhibits an outstanding cycling property of 134.2 mAh g^(-1) after 500 cycles and the Coulombic efficiency of 99.1%after 1000 cycles at 1 C in LiFePO_(4)-Li *** cooperated with LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622)cathode,the PLL-CSSE renders a capacity retention of 82.4%after 200 cycles at 0.2 *** importantly,the uniform dispersion of LLZO in PEO matrix is tentative tested via Raman and FT-IR spectra and should be responsible for the improved electrochemical *** same conclusion can be drawn from the interface investigation after *** work presents an intriguing solid-state electrolyte with high electrochemical performance,which will boost the development of all-solid-state lithium batteries with high energy density.

关键词： All-solid-state lithium battery Polymer/inorganic composite electrolyte Uniformly dispersion Interface compatibility

Difference in microstructural characteristics of stamp-charged coke and gravity-charged coke with approximate macroscopic performance

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第5期31卷 1050-1062页

作者： Chong Zou Zheng-yan Huang Jian-yun Li Bin Li Shi-wei Liu Yuan She School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710311ShaanxiChina Technical Center of shandong Iron and Steel Co. Ltd.(Laiwu Branch)Jinan271104ShandongChina

The microstructural characteristics including optical texture,porosity and pore structure and chemical structure of stamp-charged coke(SCC)and gravity-charged coke(GCC)with similar conventional macro-indicators were investigated,and the properties including micro-strength,reactivity of coke matrix and that after alkali enrichment were comparatively studied by various characterization *** anisotropic structure of SCC is composed of high content of fine mosaic texture,while the content of medium mosaic texture,coarse texture and fibrous texture is *** statistical average shows that the fine mosaic average of SCC(24.89%)is 3.78 times the GCC average(6.58%),and the coarse mosaic average(1.24%)is only about 1/3 of the GCC average(3.43%).The porosity of SCC is lower than that of GCC,but tamping process does not lead to the fact that the number of closed pores of SCC is significantly lower than that of *** the structure of SCC is compact,its pore number is large and the pore wall is *** of coke with diameter less than 150 nm seem unaffected by tamping *** aromatic structure of SCC was less ordered than that of GCC,which was speculated to be related to the addition of more low metamorphic coal in *** microscopic strength and structural strength of SCC are lower than those of *** reactivity of coke matrix is affected by the specific surface area,but it is not the determining factor of its *** improvement in dissolution reactivity of coke after potassium enrichment is independent of coke type.

关键词： Stamp-charged coke Optical texture Porosity microstructure Reactivity

Comparison of semi-coke with traditional pulverized coal injection and iron ore sintering fuels based on chemical structure and combustion behavior

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2022年第5期29卷 725-740页

作者： Jiang-yong He Chong Zou Jun-xue Zhao Dong Liang Jia-le Xi Cheng Ma School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710311ShaanxiChina Technical Center of shandong Iron and Steel Co. Ltd.(Laiwu Branch)Jinan271104ShandongChina

Substantial semi-coke has been produced through the industrialized low-temperature pyrolysis process,which has great potential as an alternative fuel for pulverized coal injection(PCI)and iron ore sintering.X-ray diffraction,Raman spectroscope,and thermal analysis were used to compare the carbon chemical structure and combustion reactivity of semi-coke,pulverized coal,and coke *** results show that the average volatile matter content in 46 types of semi-cokes is 8.94 wt.%.The fluctuation range of the characteristic parameters of the semi-coke chemical structure is d_(002)=(0.352–0.379)nm and A_(D1)/A_(G)=(2.51–7.92),while the fluctuation range of the characteristic parameters of pulverized coal is d_(002)=(0.348–0.373)nm and A_(D1)/A_(G)=(1.71–9.03)(where d_(002)means the interlayer spacing between the aromatic planes,and A_(D1)/A_(G)is an index that characterizes the degree of disorder of the char structure through the area ratio of the defect peak band D1 to the perfect graphite peak band G);the overlap between these ranges is relatively ***,the fluctuation range of the characteristic parameters of coke breeze is d_(002)=(0.343–0.350)nm and A_(D1)/A_(G)=(0.75–2.51),which is markedly different from that of ***-coke combustion reactivity is close to that of pulverized coal,but considerably better than that of coke *** terms of chemical structure and combustion reactivity,semi-coke can be used as an alternative fuel for PCI;however,when used for sintering alternative fuel,matching of the heat supply and demand in the later sintering stage must be scrupulously analyzed.

关键词： Semi-coke Coke Blast furnace Pulverized coal injection Combustion

Mapping and resource evaluation of deep high-temperature geothermal resources in the Jiyang Depression,China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Geoscience 2024年第4期5卷 142-155页

作者： Shaozheng Wang Yaoqi Zhou Xin Zhang Yangzhou Wang Yonghong Yang Yuehan Shang Yang Chen Xiaoxin Shi School of Geosciences China University of Petroleum(East China)QingdaoShandong266580China shandong Energy Group Co. Ltd.JinanShandong250101China Research Institute of Petroleum Exploration and Developement Shengli OilfieldDongyingShandong257000China

In China,geothermal resource utilization has mainly focused on resources at shallow and medium ***,the exploration of deep,high-temperature geothermal resources holds significant importance for achieving the“dual carbon”goals and the transition of energy *** Jiyang Depression in the Bohai Bay Basin has vast potential for deep,high-temperature geothermal *** analyzing data from 2187 wells with temperature logs and 270 locations for temperature measurement in deep strata,we mapped the geothermal field of shallow to medium-deep layers in the Jiyang Depression using ArcGIS and predicted the temperatures of deep layers with a burial depth of 4000 *** stochastic modeling and numerical simulation,a reservoir attribute parameter database for favorable deep,high-temperature geothermal areas was developed,systematically characterizing the spatial distribution of geothermal resources within a play fairway of 139.5 km2 and estimating the exploitable deep geothermal resource potential by using the heat storage method and Monte Carlo data *** study reveals that the Fan 54 well block in the Boxing-Jijia region is of prime significance to develop deep,high-temperature geothermal resources in the Jiyang *** from the Cenozoic to the Upper Paleozoic are identified as effective cap layers for these deep geothermal *** Lower Paleozoic capable of effectively storing thermal energy and possessing an exploitable resource volume up to 127 million tons of standard coal,is identified as a target system for the development of deep high-temperature geothermal resources,providing significant insights for the efficient development of geothermal resources in the Jiyang Depression.

关键词： Deep high-temperature geothermal resource Geological modeling Resource assessment Lower Paleozoic Jiyang Depression

Studies on plasma-activated perilla seed oil:Diagnosis,optimisation,and validation of reactive species

在线全文

学校读者我要写书评

暂无评论

High Voltage 2023年第4期8卷 841-851页

作者： Xiaolong Wang Jun Liu Quanxin Li Lian Li Shanrui Li Yunhan Ding Tong Zhao Ying Sun Yuantao Zhang School of Electrical Engineering Shandong UniversityJinanChina State Grid Hubei Electric Power Co. Ltd.WuhanChina The Second Hospital of shandong University Shandong UniversityJinanChina Key Laboratory of Chemical Biology(Ministry of Education) Institute of Biochemical and Biotechnological DrugsSchool of Pharmaceutical SciencesCheeloo College of MedicineShandong UniversityJinanChina

Recently,the applications of cold atmospheric plasma(CAP)in liquid treatment have attracted increasing attention owing to its excellent medical *** has been proved that CAP can effectively enhance the biological activity of vegetable oils due to the generation of reactive *** the reactor parameter is an important approach to regulate reactive species in plasma-activated oil to obtain better biological *** this study,a self-made jet array driven by a pulsed power supply was used to generate large-area plasma to irradiate perilla seed oil(PSO),with the formation of plasmaactivated perilla seed oil(PAPSO).By means of laser-induced fluorescence and chemical titration,the relative density of hydroxyl radical radical in plasma jet,as well as the activity of PAPSO were measured under different discharge parameters,and realised the control of the activity of *** vitro experiments showed that PAPSO significantly enhanced its ability to inhibit cancer cells proliferation and induce apoptosis after plasma treatment,which provides a reference for cancer *** study is helpful to further understand the influence of plasma dose effect on the activity of media and provide guidance for related plasma medical applications.

关键词： reactive cancer radical

Enhanced Fracture Toughness of Pressureless-sintered SiC Ceramics by Addition of Graphene

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2016年第7期32卷 633-638页

作者： Qisong Li Yujun Zhang Hongyu Gong Haibin Sun Wenjie Li Li Ma Yanshuang Zhang Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials of Ministry of Education Shandong University School of Materials and Chemical Engineering Zhongyuan University of Technology Key Laboratory of Special Functional Aggregated Materials Ministry of Education Shandong University shandong Baona New Materials Co. Ltd.

To enhance the fracture toughness of pressureless-sintered SiC ceramic, graphene was introduced as an additive. The effects of graphene contents on the fracture toughness, bending strength, micro-hardness, phase compositions, and microstructure evolutions of the SiC ceramics were investigated in detail by scanning electron microscopy, energy dispersive X-ray spectroscopy, and metallographic microscopy. The fracture toughness, bending strength and micro-hardness increased initially, and then decreased with the graphene content increasing from 0 to 5.0 wt%. The highest fracture toughness of 5.65 MPa m1/2 was obtained for sample with 1.0 wt% graphene sintered at 2130 ℃ for 1 h in At, which was about 22.6% higher than that of SiC sample without graphene. In addition, the highest bending strength and microhardness of 434.14 MPa and 29.21 GPa corresponded to the SiC samples with graphene content of 0.5 wt% and 2.0 wt%, respectively.

关键词： SiCGrapheneFracture toughnessBending strengthmicro-hardness

Control of Southern Root-knot Nematodes on Tomato and Regulation of Soil Bacterial Community by Biofumigation with Zanthoxylum bungeanum Seed

在线全文

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2021年第1期7卷 49-58页

作者： Xiaoyun Wang Wencong Shi Jilei Wang Zheng Gao Shuang Li Ningxin Wang Qinghua Shi College of Horticulture Science and Engineering Shandong Agricultural UniversityTai’an 271018China College of Life Sciences Shandong Agricultural UniversityTai’an 271018China College of Plant Protection Shandong Agricultural UniversityTai’an 271018China State Key Laboratory of Crop Biology Shandong Agricultural UniversityTai’an 271018China shandong Liangjian Bioengineering Co. Ltd.Jinan 271100China

Biofumigation is an environmentally friendly strategy used to control nematodes and plant *** volatile oil of Zanthoxylum bungeanum has high insecticidal and antibacterial ***,it is not known if the seed of *** is a suitable material for biofumigation to control southern root-knot nematodes(SRKN)on tomato,and how it may regulate the soil bacterial community *** used pot experiments in the greenhouse to determine the effects of *** seeds on SRKN,plant growth parameters,soil physicochemical and microbial characteristics.A total of 26 volatile components,including nematicidally active substances,were identified from *** *** seed biofumigation significantly reduced the SRKN population by 88.89%and 81.55%on the 50th and 100th day after transplanting,*** to the control,the total soluble sugar,soluble solids,soluble protein,titratable acid,root activity and the fruit yield per tomato plant increased *** content of soil alkali-hydrolyzed nitrogen,available potassium and the soil enzyme activities were also significantly *** soil bacterial diversity and the co-occurrence network complexity were increased by *** seed *** keystone OTUs in biofumigation soil had potential plant growth-promoting *** function of *** seed increasing tomato production in SRKN-infected soil depends on directly killing SRKN and improving soil *** results indicate that *** seed can be used as both a nematicide and a high quality organic fertilizer in tomato production.

关键词： biofumigant Zanthoxylum bungeanum seed root-knot nematode tomato soil bacterial community

Risk of Developing Non-Alcoholic Fatty Liver Disease Over Time in a Cohort of the Elderly in Qingdao,China

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2023年第8期36卷 760-767页

作者： LIU Li SHAO Yu Han FENG En Qiang SHAO Zhu Gang XING Dong Ming Cancer Institute The Affiliated Hospital of Qingdao UniversityQingdao UniversityQingdao 266071ShandongChina Qingdao Cancer Institute Qingdao 266071ShandongChina Qingdao Municipal Center for Disease Control and Prevention Qingdao 266033ShandongChina Qingdao Institute of Preventive Medicine Qingdao 266033ShandongChina shandong Muhua Medical Technology Co. LtdQingdao 266109ShandongChina School of Life Sciences Tsinghua UniversityBeijing 100084China

Nonalcoholic fatty liver disease(NAFLD)is characterized by fat accumulation in the liver in the absence of alcohol consumption and comprises a variety of conditions such as simple steatosis,nonalcoholic steatohepatitis,fibrosis,and cirrhosis^([1]).More than one-quarter of the world’s population experience NAFLD^([2]).The prevalence of NAFLD in China increased from 23.8%in 2001 to 32.9%in 2018,indicating that hepatitis B virus is the primary cause of chronic liver disease^([3]).

关键词： NAFLD liver Liver