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Preparation and Properties of Ceramic Facing Brick from East-lake Sediment

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Journal of Wuhan University of Technology(Materials Science) 2012年第1期27卷 154-159页

作者： WU Jianfeng LENG Guanghui XU Xiaohong zhang yaxiang LAO Xinbin Li Kun School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

In order to utilize solid wastes, ceramic facing brick was made form East-lake sediment and some additives. The strength and freeze-thaw resistance of the samples were tested, and the crystal phases and microstructures were studied by XRD and SEM. The results indicate that the samples have a wide firing temperature range. The main crystal phases are CaA12SizOs, a-Al203, Fe203, which distribute uniformly in the samples. The sample have the best properties in the series ＇Ca-A1-Si＇, and water absorption （Wa）, porosity （Pa）, bulk density （D）, bending strength and compressive strength are 7.24%, 15.82%, 2.19 ***＂3, 45.57 MPa and 56.81 MPa respectively, when the addition amount of East-lake sediment is 80% and the firing temperature is 1 100 ~C. In the series ＇K-A1-Si＇, the sample with the best properties was obtained when addition amount of East-lake sediment was 70% and firing temperature was 1 060 ~C. The water absorption, porosity, bulk density, bending strength and compressive strength are 7.62%, 16.37%, 2.15 g ~ cm＂3, 39.26 MPa, and 50.81 MPa respectively. They all come up to the national standardization, and meet the needs of manufacturing production.

关键词： East-lake sediment ceramic facing brick pressing method structures and functions

Research and Development of Cadmium Sulphoselenide Red Pigment

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Journal of Wuhan University of Technology(Materials Science) 2015年第6期30卷 1247-1254页

作者：吴建锋 LI Kun XU Xiaohong zhang yaxiang XU Xiaoyang LAO Xinbin State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology School of Materials Science and Engineering Wuhan University of Technology

Cadmium sulphoselenide was synthesized continuous substitution solid solution and the only known pigment to yield bright red color on ceramic decoration. Encapsulated cadmium sulphoselenide pigments could yield abundant hues from yellow to red with high opacity at high temperature. The color generation has a linear function relation with the substitution rate. The encapsulation formation process of zirconium silicate encapsulated cadmium sulphoselenide was shown. Insuffi cient encapsulation effi ciency and potential hazard to human and environment had limited the industrial application of cadmium sulphoselenide red pigment. Ink-jet printing decoration required fi ne size cadmium sulphoselenide red pigment on ceramic decoration. The review mainly focused on the synthesis techniques and industrial application of cadmium sulphoselenide red pigment.

关键词： cadmium sulphoselenide red pigment encapsulation effi ciency potential hazard industrial application

Effect of MnO2 on Properties of SiC-mullite Composite Ceramics for Solar Sensible Thermal Storage

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Journal of Wuhan University of Technology(Materials Science) 2016年第3期31卷 491-495页

作者：徐晓虹 lao xinbin wu jianfeng zhang yaxiang xu xiaoyang li kun School of Material Science and Engineering Wuhan University of TechnologyWuhan 430070China

For improving the properties of SiC-mullite composite ceramics used for solar sensible thermal storage, MnO2 was introduced as sintering additive when preparing. The composite ceramics were synthesized by using SiC, andalusite, a-Al2O3 as the starting materials with non-contact graphite-buried sintering method. Phase composition and microstructure of the composites were investigated by XRD and SEM, and the effect of MnOz on the properties of SiC composites was studied. Results indicated that samples SM1 with 0.2 wt% MnO2 addition achieved the optimum properties： bending strength of 70.96 MPa, heat capacity of 1.02 J.（g.K）-1, thermal conductivity of 9.05 W-（m.K）-1. Proper addition of MnO2 was found to weaken the volume effect of the composites and improve the thermal shock resistance with an increased rate of 27.84% for bending strength after 30 cycles of thermal shock （air cooling from 1 100 ℃ to RT）. Key words： SiC-mullite composite ceramics; MnO2; solar sensible thermal storage; non-contact graphite-buried sintering; thermal shock resistance

关键词： SiC-mullite composite ceramics Mn02 solar sensible thermal storage non-contact graphite-buried sintering thermal shock resistance

Cordierite Ceramics Prepared from Poor Quality Kaolin for Electric Heater Supports: Sintering Process, Phase Transformation, Microstructure Evolution and Properties

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Journal of Wuhan University of Technology(Materials Science) 2018年第3期33卷 598-607页

作者：吴建锋陆成龙 XU Xiaohong zhang yaxiang WANG Dongbin zhang Qiankun State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology

To efficiently utilize the kaolin, an economical way of preparing cordierite ceramic with high performance for electric heater supports was put forward. In this study, sintering process, phase transformation, microstructure evolutions were systematically studied by heating microscope, X-ray diffraction, scanning electronic microscope and thermal analysis. Properties（physical properties, electrical properties and coefficient of thermal expansion（CTE）） were tested for comprehensive performance evaluation. The results showed that the utilization of poor quality kaolin broadened the firing range of cordierite ceramic which was from 1 200 to 1 380 ℃. Microstructure becomes loose with increasing of the pore size, which had significant influence on bending strength and electrical properties. High content of K2 O in poor quality kaolin was the reason for liquid phase generation in sintering process, which further leads to microstructural changes. The cordierite ceramic sintered at 1 320 ℃ had the properties as follows： CTE of 1.98×10^（-6） ℃^（-1）（500 ℃）, bending strength of 90 MPa, apparent porosity of 15.1%, dielectric constant of 7.5（100 Hz）, and volume resistivity of 1.05×109 Ω·cm（100 Hz）. The comprehensive properties are very suitable for use as electric heater supports.

关键词： cordierite ceramic poor quality kaolin microstructure-final electrical properties electric heater supports

农业科研管理人员参与土壤三普工作的实践与思考——以江苏省农业科学院农业资源与环境研究所为例

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农业科技管理 2024年第4期43卷 63-65页

作者：徐蓉丁维荣张娅香胡宇容李建伟师倩云马艳江苏省农业科学院农业资源与环境研究所南京210014

第三次全国土壤普查是一次重大国情国力的调查,时间紧、任务重、要求严、标准高。江苏省农业科学院农业资源与环境研究所统筹调配人员以确保人员力量到位,积极动员科研管理人员参与,全力支撑土壤三普工作。文章介绍了江苏省农业科学院... 详细信息

第三次全国土壤普查是一次重大国情国力的调查,时间紧、任务重、要求严、标准高。江苏省农业科学院农业资源与环境研究所统筹调配人员以确保人员力量到位,积极动员科研管理人员参与,全力支撑土壤三普工作。文章介绍了江苏省农业科学院农业资源与环境研究所科研管理人员概况,阐述了该所科研管理人员参与土壤三普工作的实践,并从农业科研管理人员是科研事业的重要参与者、新时期需要多元化高水平复合型科研管理人才、深度参与科研事业是培养新时期科研管理人才的重要途径等方面对农业科研管理人员参与土壤三普工作展开思考。

关键词：农业科研管理人员土壤三普实践

Gut microbiota affects the estrus return of sows by regulating the metabolism of sex steroid hormones

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Journal of Animal Science and Biotechnology 2024年第2期15卷 578-599页

作者： Min Liu Jia zhang Yunyan Zhou Shuqi Xiong Mengqing Zhou Lin Wu Qin Liu Zhe Chen Hui Jiang Jiawen Yang Yuxin Liu yaxiang Wang Congying Chen Lusheng Huang National Key Laboratory of Swine Genetic Improvement and Germplasm Innovation Jiangxi Agricultural UniversityNanchang 330045China

Background Sex hormones play important roles in the estrus return of post-weaning *** studies have demonstrated a complex and bi-directional regulation between sex hormones and gut ***,the extent to which the gut microbiota affects estrus return of post-weaning sows is largely *** In this study,we first screened 207 fecal samples from well-phenotyped sows by 16S rRNA gene sequencing and identified significant associations between microbes and estrus return of post-weaning *** metagenomic sequencing data from 85 fecal samples,we identified 37 bacterial species that were significantly associated with estrus *** returning sows were characterized by increased abundances of *** and *** and decreased abundances of ***,***,and *** changes in gut microbial composition significantly altered the functional capacity of steroid hormone biosynthesis in the gut *** results were confirmed in a validation *** changes in sex steroid hormones and related compounds were found between normal and non-return sows via metabolome *** integrated analysis of differential bacterial species,metagenome,and fecal metabolome provided evidence that normal return-associated bacterial species *** and Prevotella *** in the degradation of pregnenolone,progesterone,and testosterone,thereby promoting estrogen ***,the microbial metabolites related to sow energy and nutrient supply or metabolic disorders also showed relationships with sow estrus *** An integrated analysis of differentially abundant bacterial species,metagenome,and fecal metabolome revealed the involvement of *** and Prevotella *** sow estrus *** findings provide deep insight into the role of gut microbiota in the estrus return of post-weaning sows and the complex cross-talk between gut microbiota and sex hormones,suggesting that the manipulatio

关键词： Estrus return Fecal metabolome Gut microbiota Metagenomics Sex steroid hormones Sow

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白居易与苏轼怀古诗艺术风格之比较

阜阳职业技术学院学报 2015年第4期26卷 86-88页

作者：张亚祥阜阳市第五中学安徽阜阳236031

白居易和苏轼,皆为诗坛巨擘,皆对当世乃至后世影响极大。白居易,唐代继杜甫之后最伟大的现实主义诗人,在其现存2806首诗作中,怀古诗仅有72首,所占比例约为四十分之一;苏轼,在其现存2600多首诗作中,怀古诗426首,所占比例约为六分之一。... 详细信息

白居易和苏轼,皆为诗坛巨擘,皆对当世乃至后世影响极大。白居易,唐代继杜甫之后最伟大的现实主义诗人,在其现存2806首诗作中,怀古诗仅有72首,所占比例约为四十分之一;苏轼,在其现存2600多首诗作中,怀古诗426首,所占比例约为六分之一。文章拟就二人怀古诗艺术风格及对后世影响方面加以比较。

关键词：白居易苏轼怀古诗风格比较

一种基于载波相位测向的自主定位跟踪系统设计与实现

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航天控制 2014年第3期32卷 57-61页

作者：邓志均曹建文史进朝张亚祥张凤中国运载火箭技术研究院研究发展中心北京100076 中国航天电子技术研究院北京100094 北京遥测技术研究所北京100076

针对低空小型无人飞行器,设计并实现了一种基于载波相位测向的自主定位跟踪系统,该系统不依赖GPS等外部导航卫星系统,通过对飞行器的高精度测角、测距及高度测量,实现飞行器的实时跟踪及定位。

关键词：载波相位测向自主定位跟踪

太阳能吸热器用莫来石--碳化硅陶瓷的原位合成(英文)

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硅酸盐学报 2014年第7期42卷 869-877页

作者：徐晓虹饶郑刚吴建锋张亚祥劳新斌徐笑阳李坤武汉理工大学、硅酸盐建筑材料国家重点实验室武汉430070

采用半干压成型和无压烧成技术,原位合成了用于太阳能热发电吸热器的莫来石结合碳化硅（SiC）吸热陶瓷。研究结果表明：经1 520℃烧成的样品B2（粒径≤61μm SiC 72%,粒径≤20μm SiC 18%,工业氧化铝4.64%,苏州高岭土5.36%）的综合性能... 详细信息

采用半干压成型和无压烧成技术,原位合成了用于太阳能热发电吸热器的莫来石结合碳化硅（SiC）吸热陶瓷。研究结果表明：经1 520℃烧成的样品B2（粒径≤61μm SiC 72%,粒径≤20μm SiC 18%,工业氧化铝4.64%,苏州高岭土5.36%）的综合性能最佳,其显气孔率、吸水率、体积密度和抗折强度分别为28.40%、13.35%、2.13g/cm^3和44.20MPa;热震试验30次（1 100℃~室温,风冷）,样品无裂纹,强度增加率达52.30%;在1 300℃氧化100h后,样品的氧化增重为25.43mg/cm^2,氧化动力学常数为1.80×10^-7kg^2/（m4·s）。物相分析表明,样品的相组成为碳化硅、莫来石、石英和刚玉。显微结构分析表明,原位合成的莫来石结合于碳化硅颗粒间,赋予样品较好的抗折强度。热震试验30次后,可在样品中观察到更加致密的结构,碳化硅晶粒被树枝状微晶紧密联接,改善了样品的抗热震性。莫来石--碳化硅复相陶瓷可作为塔式太阳能热发电吸热器的潜在应用材料。

关键词：太阳能吸热材料莫来石--碳化硅复相陶瓷原位合成抗热震性能