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玄武岩纤维矿物组成形态及熔融析晶特性 樊霆1,童庆2,叶文玲1,汤婕1,陈海燕1,张颖慧1,李定心1 (1. 安徽农业大学 资源与环境学院,安徽 合肥,230036; 2. 合肥水泥研究设计院,安徽 合肥,230051) 摘要:采用X 线衍射分析(XRD),X线荧光分析(XRF),扫描电镜分析(SEM)和热重-差热分析(TG-DSC),对取自黑龙江鸡西玄武岩样本(样品A)和辽宁阜新玄武岩矿物样品...), scanning electron microscopy (SEM) and thermo gravimetric-differential scanning calorimetry (TG-DSC) methods. The results show that the main mineral components of the two samples are labradorite......
C-SiC-B4C复合材料烧结曲线的制定研究黄健,陈石林,李姗姗,刘会忠,叶崇湖南大学材料科学与工程学院摘 要:利用TG-DSC热分析和傅里叶红外光谱分析研究了在不同炭化温度下C-SiC-B4C复合材料用煤沥青粘结剂的热缩聚焦化过程,考察了煤沥青焦化过程中内部结构基团变化.通过对中温煤沥青的TG-DSC分析和红外分析结果发现:中温煤沥青的结焦炭化过程主要在210600℃之间完成,当利用煤沥青作粘结剂制备C-SiC-B4C复合材料时,这个温度区间的升温速率必须尽量减慢;一定范围内,随着烧结温度的提高,能够提高C-SiC-B4C复合材料的致密化程度.关键词:炭-陶瓷复合材料;陶瓷相;SiC;B4C;制备;烧结曲线;煤沥青;......
TG-DSC热分析技术,在不同升温速率条件下对主要载金硫化物黄铁矿的热分解动力学进行研究,并采用SEM对反应前后的黄铁矿微观结构进行分析.结果表明:黄铁矿热分解的温度区间为400~800 ℃,质量损失率保持在26%左右;随着升温速率的增大,TG曲线向高温区偏移,即得到相同转化率所需的温度越高,其最大反应速率的温度范围为600~700 ℃.采用Kissinger法和Ozawa-Doyle法求得黄铁矿... decomposition kinetics of main gold-bearing sulfides pyrite was investigated by TG-DSC thermal analysis at different heating rates. The microstructures of pyrite before and after decomposition were analyzed......
-Differential Scanning Calorimetry (TG-DSC) measurements. Key words:Degraded chitosan; furfural; RE3+ ions; complex; characterization; [全文内容正在添加中] ......
separation membrane to enhance oxygen permeability. Thermal decomposition behavior and phase variation of the precursor were investigated by thermal analyzer (TG-DSC) and high-temperature X-ray diffraction (HT... behavior of precursor was also investigated by TG-DSC and high-temperature XRD (HT-XRD). The oxygen permeation flux was studied in partial oxidation experiment of coke oven gas (COG) with submicron......
with Ti(OC4H9)4 to form sol and gel. The decomposition process of the precursor, and crystallization and particle size of CZTOPN were examined by thermal analysis (TG-DSC), powder X-ray diffraction (XRD), and scan election microscopy (SEM). Results of TG-DSC and XRD reveal that the composition of Ca0.8Zn0.2TiO3∶Pr3+, Na+ changes with the sintering temperature. SEM data indicate that the diameter......
2:1),制备出具有不同形貌的氧化铝前驱体,用SEM,XRD和TG-DSC分析对粉体的微观结构及热分解过程进行了研究.结果表明:相同条件下,水热处理温度影响氧化铝前驱体的微观形貌及向α-Al2O3转变的温度,随水热处理温度的提高,其相结构由无定型态向结晶度高的薄水铝石相转变,而其煅烧产物向α-Al2O3转变的温度逐渐升高.利用Doyle-Ozawa法和Kissinger法计算经水热温度为...(TG-DSC). The results show that, under the same conditions, hydrothermal temperature affects the morphology of the alumina precursor and the phase transition temperature of α-Al2O3. With increasing......
(TG-DSC)曲线.由图4可见:LF3精炼渣在升温至1 000 ℃的过程中,总质量损失率为13.2%,DSC曲线在320 ℃左右的吸热峰对应C3AH6[15],450 ℃和700~750 ℃区间的吸热峰分别对应CH和CC[15-16],这与XRD的分析结果吻合.而380 ℃左右的吸热峰对应非晶态的AH3凝胶[15-17],80~180 ℃区间的弱吸热峰对应非晶态的C-A-S-H凝胶[17],说明精炼渣在打水冷却过程中发生的水化反应还有凝胶类产物. 图4 LF3精炼渣的热重-差示扫描量热法(TG-DSC)曲线 Fig. 4 TG-DSC curves of LF3 refining slag 2.2 精炼渣水化结果和产物分析 2.2.1 净浆强度 图5所示为精炼渣,转炉钢渣和硅酸盐水泥的净浆抗压强度曲线.由图5可见:硅酸盐水泥的净浆抗压强度最高,而转炉钢渣的净浆抗压强度最低,7 d前强度......
氧化锡(ATO)前驱体的固液相分离过滤速度和产物ATO粒径的影响及其相互作用机理.借助透射电镜(TEM),热重-差示扫描量热分析(TG-DSC)等进行表征.研究结果表明:采用适量PAM对纳米ATO前驱体进行絮凝处理,不但能显著提高纳米ATO前驱体的固液相分离速度,缩短分离过滤时间,且能有效地抑制硬团聚的形成;采用非离子聚丙烯酰胺对纳米ATO前驱体进行絮凝处理,分离过滤时间仅为原来的1/10,所得产... were studied using transmission electron microscopy (TEM), thermogravimetric- differential scanning calormetrycaloric instrument (TG-DSC), Fourier transform infrared spectroscopy (FT-IR) and laser......
热重与差热(TG-DSC)分析,以此确定薄膜的热处理工艺.分别采用X射线衍射(XRD),扫描电子显微镜(SEM),原子力显微镜(AFM)和B1500A半导体器件分析仪对薄膜性能进行表征.结果表明:800 ℃下在氧气气氛中退火15 min可以得到结晶度良好,致密度较高的纯钙钛矿相BST薄膜,其对应的晶粒尺寸和均方根粗糙度分别为30~40 nm和5.80 nm.薄膜厚度为160~378 nm时,BST...) Abstract: Ba0.8Sr0.2TiO3 (BST) ferroelectric thin films with perovskite structure were prepared on Si and Pt/Ti/SiO2/Si substrates by sol-gel method. The heat-treatment technology (TG-DSC), X-ray......