Influence of LiBO2 addition on the microstructure and lithium-ion conductivity of Li1+xAlxTi2−x(PO4)3(x = 0.3) ceramic electrolyte

Concerning the safety problems of conventional Li-ion batteries with liquid electrolytes, it is crucial to develop reliable solid-state electrolytes with high ionic conductivity. Li_1+xAl_xTi_2?x(PO₄)₃ (LATP, x = 0.3) is regarded as one of the most promising solid electrolytes due to its high ionic conductivity and excellent chemical stability to humidity.Herein, a new strategy is proposed for improving the sintering behavior and enhancing the ionic conductivity of LATP by using LiBO₂ as the sintering aid via liquid phase sintering. The as-prepared sample LATP with homogeneous microstructure and high relative density of 97.1% was successfully synthesized, yielding high total ionic conductivity of 3.5 × 10^?4 S cm^?1 and low activation energy of 0.39 eV at room temperature. It was found that the addition of LiBO₂ could effectively enhance the densification and increase the ionic conductivity of LATP electrolyte, proving an effective way to synthesis LATP ceramics by a simple and reliable route.     

Surface modification of superfine SiC powders by ternary modifiers-KH560/sodium humate/SDS and its mechanism

SiC is a promising functional ceramic material with many great properties. High concentrated SiC slurry with excellent rheology and stability is required in some processes of ceramic forming. In this work, the dispersion of SiC powders was obviously improved by ternary modifiers: γ-(2,3-epoxypropoxy) propytrimethoxysilane (KH560), sodium humate and sodium dodecyl sulfate (SDS). Modified SiC slurry showed the lowest viscosity of 0.168 Pa s at a solid content of 50 vol%. The maximum absolute value of zeta potential of SiC increased from 47.3 to 61.6 mV by modification. Sedimentation experiments showed that a highly stable suspension of modified SiC was obtained at pH 10. SiC green body with high density of 2.643 g/cm³ was prepared with modified powders by slip casting. X-ray photoelectron spectra (XPS) and thermogravimetry (TG) measurements indicated the adsorption of modifiers on SiC surface. Therefore, modified SiC powders could stably disperse in aqueous media due to the increase of electrosteric repulsion between particles. The novel strategy used in this study could further improve the dispersion of SiC powders.     

电气石粒度对其远红外辐射和吸附效应的影响

为了更深入了解超细纳米化电气石的特性,对新疆阿勒泰矿区的黑色电气石样品进行了超细纳米化处理,考察了不同粒径的电气石超细粉体对其远红外辐射和吸附效应的影响,并作出了相应的评价。     

磷渣超细粉混凝土流动性、强度与耐久性

磷渣超细粉（比表面积＞６０００ｃｍ２／ｇ）是一种玻璃质粉体，与矿渣类似，取代砼中部分水泥，可以提高砼的流动性、强度与耐久性。单方砼中磷渣超细粉２７５ｋｇ、５２５＃硅酸盐水泥２７５ｋｇ、水胶比０．２６、高效减水剂９．７ｋｇ，砼坍落度２４ｃｍ，２８天强度１０１ＭＰａ，Ｃｌ－扩散系数比基准砼降低了１／３左右。     

气流粉碎技术及其设备研制

在气流粉碎机设计中，有两个需要解决的技术关键问题：一是粉碎能应最大限度地消耗于表面能的增加，以提高产率；二是有效地防止大颗粒溢出，严格控制产品粒度。本文根据复杂的流场理论及试验结果。分析并提出了解决问题有效途径。详尽介绍了ＪＭ型气流粉碎机的粉原理、工艺流程和主要技术参数的确定依据，使用结果表明，ＪＭ型气流粉碎机是超细粉体制备技术中最为有效的设备。     

某微细嵌布贫赤铁矿石直接还原-弱磁选试验

湖南某赤铁矿石铁品位约27%，大部分铁矿物嵌布粒度在5 μm左右。对该矿石进行煤基直接还原-弱磁选试验研究，主要考察了还原温度、还原时间对还原效果的影响以及磨矿细度、磁场强度对弱磁选效果的影响。试验结果表明：将原矿压团后与烟煤（煤与矿的质量比为2∶1）在1 150 ℃下还原焙烧100 min，所得还原矿的金属化率为93.41%；还原矿磨至-0.043 mm占90.22%后在63.68 kA/m的磁场强度下经1次弱磁选，可获得铁品位为75.71%、金属化率为92.11%、铁回收率为91.12%的铁精矿。     

聚酯超细纤维染色初始吸附的研究

采用测定染色残液的方法来测定聚酯超细纤维在不同染色温度和时间下的上染轨迹曲线，提出初始吸附是影响染色匀染的主要因素。     

纺特细号纱胶辊胶圈的优化组合

论述了不同性能胶辊，胶圈的纺纱特性，工艺配置及纺纱效果，以CJ4．0tex纱为例，通过纺纱试验，探讨了纺制优质特细号纱的纺纱专件器材的优选组合及工艺的合理配置，提出了降低特细号纱细纱断头的措施。     

超微苹果渣粉在香肠中的应用研究

本文探索了超微苹果渣粉在中式香肠中的应用效果。感官评定结果显示添加0.8%超微苹果渣粉对香肠的感官品质无不良影响;过氧化值(POV)、过氧化脂质生成物(丙二醛)和酸价的测定结果表明:添加了0.8%超微苹果渣粉能显著增强产品的抗氧化性能,效果十分显著。     

高纯超细SrTiO3粉料的液相合成方法

本文研究了三种高纯超细ＳｒＴｉＯ３粉料的液相合成方法：草酸盐沉淀法、过氧化物热分解法和液相直接沉淀法。通过在使用原料、制备流程、工艺条件、粉料收率及粉料性能等方面的对比得出：液相直接沉淀法具有原料便宜易得、工艺流程简单、操作方便、不需高温热分解和粉料收率高等优点，而且制得的粉料在粒度、粒度分布、颗粒形状及团聚状态等方面均优于另外两种方法制备出的粉料。