共查询到19条相似文献,搜索用时 78 毫秒
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考察了在乙酸丁酯相中制备稳定均匀分散的纳米ITO浆料。选用两种分散剂聚乙烯吡咯烷酮(PVP)和钛酸酯(titanate),通过球磨分散法制备稳定ITO(indium tin oxide)浆料,并分析比较不同pH、分散剂用量、磨介氧化锆球粒径及用量和球磨时间对ITO浆料分散稳定性的影响,研究分散机理。结果表明,在pH=7.8,分散剂用量为ITO粉体质量的5.5%,磨介氧化锆用量为ITO粉体质量的2.6倍,磨介氧化锆粒径小于0.5 mm,球磨分散时间24 h时,制得的纳米ITO浆料分散稳定性最佳;且比较由两种分散剂制得的ITO浆料在储存时间为0 d与30 d的浆料粒径变化,后者稳定性优于前者。 相似文献
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纳米二氧化硅水性浆料的研制 总被引:4,自引:0,他引:4
通过分散剂表面改性的方法.应用高速机械搅拌,高剪切砂磨和超声波分散等多种分散手段.制备了亲水型和疏水型两种类型纳米SiO2的水性浆料,通过常温沉降实验、Zeta电位测试以及透射电镜观察.研究了分散剂类型,用量、润湿剂类型.pH值、水性树脂和分散手段等多种因素对纳米SiO2水性浆料分散稳定性的影响。在最佳分散剂.润湿剂、pH值和加入水性树脂的条件下.通过砂磨和超声波分散相结合的手段.制得了分散稳定性良好的纳米SiO2水性浆料。 相似文献
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采用球磨法制备了3种纳米锑掺杂二氧化锡(简称ATO)水性分散液,包括未加分散剂,以非离子型高分子分散剂改性和以阴离子分散剂与非离子高分子分散剂复合改性3种情况,并通过Zeta电位仪、激光粒度仪、透射电镜、静止沉降实验等测试方法对纳米ATO水性分散液的稳定性进行了表征.结果发现,ATO纳米颗粒通过分散剂复合改性后,其水性分散液的稳定性最佳,当阴离子分散剂与非离子高分子分散剂的质量比为1∶2,复合分散剂用量为ATO粉体质量的6%时,所得ATO水性分散液的稳定性最好. 相似文献
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研制了一种纳米TiO2水性浆料。研究了钛酸酯偶联剂、分散剂、pH、有机膨润土以及分散方法对浆料稳定性的影响。获得了最佳配方:0.12%钛酸酯偶联剂B,0.5%分散剂3275,pH=11,0.5%有机膨润土,分散方法为高速剪切30min 砂磨10h 超声波分散30min。获得了稳定性可达到3个月以上的水性纳米TiO2浆料。紫外加速老化试验表明,当纳米TiO2浆料占清漆的3%时,经过1000h的加速老化实验后,清漆不变色。 相似文献
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采用十二烷基苯磺酸钠(SDBS)作为分散剂,通过超声波作用对纳米SiO2粉体进行水中分散,并采用分散体系粒径分析和测定Zeta 电位及透光率的方法,研究了SDBS含量、超声分散时间等因素对分散性能的影响.结果表明,纳米SiO2的粒径随分散剂含量、超声时间的增加,表现出先减小后缓慢增大的变化趋势.在适量SDBS的条件下,纳米SiO2分散体系因静电和空间位阻的作用而表现出良好的分散稳定性.SDBS对纳米SiO2粉体的较佳分散工艺为:SDBS含量为1.6% ,超声处理时间为18 min. 相似文献
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影响纳米ITO透明隔热涂料性能的因素 总被引:1,自引:0,他引:1
以纳米氧化铟锡(ITO)为隔热功能性材料,以丙烯酸树脂为成膜剂,采用共混法将无机ITO和有机丙烯酸进行复合得到纳米ITO透明隔热涂层材料。研究了ITO不同用量对涂层可见光透过率、红外线透过率、紫外线透过率以及热学、机械性能的影响,优化了ITO在纳米透明隔热涂层中的用量,比较了不同成膜剂用量对各种性能的影响。结果表明:所制得的纳米ITO透明隔热涂膜的拉伸强度和断裂伸长率分别达到了9.28 MPa、268%。具有良好的隔热效果,可见光透过率达80%以上,红外线透过率小于10%。 相似文献
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《Ceramics International》2017,43(12):8866-8872
As the key material of transparent electrodes in various optoelectronic devices, ITO targets with uniform microstructure and homogeneous elemental distributions are vital to obtain high-quality ITO films in industrial production. In this paper, the differences in the crystalline structure, sheet resistance and transmittance of ITO films with 40 nm, 70 nm and 100 nm thickness were studied between two ITO targets that were respectively sintered at 1580 °C for 10 h (target A) and 1600 °C for 5 h (target B). Surface morphology, surface roughness and thickness uniformity of ITO films with 100 nm thickness and etching property of ITO films with 40 nm and 70 nm thickness in mixed acids were further focused in the paper. The results indicate that target A, which owns homogeneous distributions of second-phase particles and elements, could be conductive to obtain the ITO films with low crystallinity that are easy to be etched leaving less and smaller residual particles. Based on the analysis, the change of sintering process has a great influence on the electrical and etching properties, but it has only a little influence on the optical property. 相似文献
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《Ceramics International》2016,42(16):18296-18302
Aqueous dispersions of tin-doped indium oxide (ITO) nanopowder were prepared and the effect of the addition of PEG 400, Tween 80 and β-alanine as dispersants was investigated using zeta potential and particle size distribution measurements. Both PEG 400 and β-alanine were found to produce stable dispersions that were used to deposit ITO thin films on glass substrates by dip and spin coating methods. The ITO thin films were heat-treated using both conventional and microwave heat treatment in order to improve the inter-particle connections and hence the resistivity and transparency of the films. All the films exhibited an average transmittance of >80% over the visible spectrum after being subjected to the heat treatment process. ITO films prepared with no dispersant showed very high resistivity values for both heating methods, however addition of 2 wt% PEG 400 to the dispersion yielded a reduction in the resistivity values to 1.4×10−1 Ω cm and 3.8×10−2 Ω cm for conventionally and microwave treated films, respectively. The surface morphological studies confirmed that addition of dispersants improved the film uniformity and inter-particle connections of the ITO films considerably. 相似文献
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文章采用CFD(计算流体力学)数值模拟的研究方法,探究了孤立街道峡谷内不同屋顶形状和污染源位置的数值仿真模型。针对平顶-三角形屋顶和三角形-平顶屋顶,以及3种污染源,共6种工况进行研究。结果表明相同屋顶形状的污染源位置变化对于气流运动无改变,对于污染物浓度相对低的壁面浓度值改变很小,但对污染物浓度相对高的壁面浓度有较大影响,街谷上部靠近屋顶位置受污染源位置的影响逐步减小。 相似文献
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采用化学共沉淀法,以金属铟和锡为原材料得到ITO粉体.添加少量的聚乙烯醇(PVA)进行研磨造粒,得到粒度在30μm左右的ITO粒.当模压压力为45 MPa,冷等静压压力为230 MPa时,其上ITO粒基本上全部为压破重组,并未见到颗粒与颗粒之间的界面,素胚较其他更紧实致密,其素胚的相对密度达到最大,为54.0%,其所烧... 相似文献
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纳米二氧化钛分散性的实验研究 总被引:8,自引:1,他引:7
针对纳米TiO2在涂料和化妆品中的应用要求,用吸光度法详细地研究分散介质、pH值、电解质以及固液比对纳米TiO2分散性的影响,并从理论上加以解释。为纳米TiO2的应用提供了理论和实践依据。 相似文献