铬绿呈色及色调变化的研究

本文研究了不同工艺所生产铬绿的呈色情况，并就合成铬绿中辅料、矿化剂对其呈色及色调的变化的影响作了探讨     

Reduction of clinkerization temperature by using phosphogypsum

Valorization of phosphogypsum as mineralizer in the burning of Portland cement clinker was studied in our laboratory. X-ray fluorescence, optical microscope technique and powder X-ray diffraction were then used to characterize the synthesized clinker and its raw mixture in terms of chemical composition and clinker mineralogical composition. The effects of phosphogypsum on structural and morphological properties of clinker minerals and on the presence of alite were followed by scanning electron microscopy combined with microprobe analysis. The addition of phosphogypsum to the cement raw mixture shows that the burning temperature decreases and therefore improves the production process of clinker. The addition of 10% phosphogypsum permits a complete clinkerization at low burning temperature (1200 degrees C), instead of 1470 degrees C, which increases the cement factory efficiency by 25% and extends the service life of furnace fire brick. Structural and morphological analysis of clinker produced under the new conditions show that phosphogypsum preserve perfectly the crystalline structure of silicate phases, which leads to the improvement of physical and mechanical properties of cement.     

高纯堇青石合成技术研究

分析研究了三种矿化剂对轻烧氧化镁－工业氧化铝－硅石粉系统合成堇青石的矿化机理。合成出了堇青石相90％、热膨胀系数α＝2．6×10-6℃－1（20～1000℃）,晶体发育良好、外观雪白的高纯（Al2O3＋MgO＋SiO2≥98．5％）堇青石熟料。     

Effect of mineralizers for preparing ZrO2 support on the supported Ni catalyst for steam-CO2 bi-reforming of methane

Supported Ni catalysts on ZrO₂ towards steam-CO₂ bi-reforming (SCBR) of methane for the production of synthesis gas were synthesized by the hydrothermal process with different mineralizers followed by l-arginine ligand-assisted incipient wetness impregnation (HT-LA-IWI) method. The effect of type and amount of mineralizers for preparing ZrO₂ supports on the nature of supports and supported Ni catalysts, as well as on the catalytic properties and structure–performance relationship were investigated. Results show that the catalytic performance is strongly dependent on the morphology and textural of ZrO₂ support notably affected by the type and amount of mineralizer. The supported Ni catalyst on the ZrO₂ prepared by using sodium acetate (molar ratio of sodium acetate/zirconium, N_SAc/Zr = 0.5) as mineralizer (Ni/ZrO₂ (SAc0.5)) shows much higher catalytic activity than the one on ZrO₂ prepared by using sodium carbonate (molar ratio of sodium carbonate/zirconium, N_SC/Zr = 0.5) as a mineralizer (Ni/ZrO₂ (SC0.5)), ascribed to higher Ni dispersion and smaller average crystallite size of Ni. With respect to both activity and stability, the sodium acetate can be selected as a suitable mineralizer for the preparation of excellent ZrO₂ support. Furthermore, the increasing N_SAc/Zr from 0.5 to 2.0 leads to an increase in surface area but a decrease in pore diameter and pore volume, which endows the Ni/ZrO₂ (SAc2.0) catalyst with much larger average crystallite size of Ni but much worse Ni dispersion than Ni/ZrO₂ (SAc0.5). As a result, Ni/ZrO₂ (SAc2.0) shows much lower catalytic activity than Ni/ZrO₂ (SAc0.5). Moreover, the Ni/ZrO₂ (SAc2.0) catalyst shows worse Ni sintering resistance than Ni/ZrO₂ (SAc0.5) owing to its weaker NiZrO₂ interaction confirmed by H₂-TPR results, which endows it with lower catalytic stability although it has higher coke deposition resistance.     

矿化剂对Al2O3-SiO2质陶瓷辊棒性能的影响

研究了含MgO的单一型矿化剂及含MgO和TiO2 的复合型矿化剂对Al2 O3-SiO2 质陶瓷辊棒性能的影响。结果表明 :基质中Al2 O3与SiO2 的质量比 (Al2 O3/SiO2 )为 2 .33时 ,引入 0 .6 %的复合型矿化剂可促进莫来石的发育和基质的烧结 ,明显改善了陶瓷辊棒的抗热震性和机械强度。     

提高深兰色料着色力的研究

通过调整Co的引入形式及基料MgO、SiO2、ZnO、Al2O3等组份，添国适量矿化剂成份，经高温合成，获得的橄榄石晶体色料，着色力强，呈色鲜艳，高温稳定，可广泛应用于釉料及釉中装饰。     

Phase tuning of zirconia nanocrystals by varying the surfactant and alkaline mineralizer

The influence of cationic (CTAB)/neutral polymeric (PVP) surfactants and strong (NaOH)/weak (NH₄OH) alkaline mineralizers on phase stabilization of zirconia nanocrystals synthesized by chemical precipitation is investigated. X-ray diffraction and micro-Raman analysis of the as-prepared samples show that tetragonal zirconia is predominant as compared to monoclinic using PVP with NH₄OH. The phases are also evident from lattice fringes of TEM images and the corresponding SAED pattern. Photoluminescence spectra of samples reveal oxygen vacancies present in the zirconia nanocrystals. The group H Raman vibration modes identified are attributed to surface defects and quantum size effects of nanocrystals. The phase stabilization of zirconia nanocrystals is explained using the polymerization rate of tetramers during synthesis. The rate can be varied by proper selection of the surfactant and the mineralizer. A slow polymerization rate with PVP and NH₄OH favors the formation of tetragonal zirconia. Thus, a simple method for phase stabilization of zirconia nanocrystals at room temperature using chemical precipitation by varying the surfactant and the mineralizer is demonstrated.     

溶胶凝胶法合成Pr、Nd-ZrSiO_4色料中矿化剂的研究

采用溶胶一凝胶法合成Pr、Nd－ZrSiO4色料并对色料进行了XRD和分光反射率测试，以揭示矿化剂对色料合成的影响。     

CaF2-CaO矿化剂对硅微粉结合的SiC窑具的晶相性能影响的研究

本研究主要探讨矿化剂对硅微粉结合的SiC窑具的析晶结构、性能的影响。分别添加不同量的混合矿化剂，用XRD法分析硅微粉的析晶结构，并进行半定量计算，选择最佳的矿化剂添加量，分别测定不同矿化剂添加量时窑具的各项宏观性能，进行综合分析，确定CaF2～CaO矿化剂的最佳添加量为1.5％。     

复合矿化剂降低陶瓷烧成温度的试验研究

本课题在使用湖南本地廉价原料的基础上，坯中采用滑石、白云石及锂辉石等复合矿化剂，用正交法优选出最佳配方，施以采用白云石、滑石、方解石、硅灰石、锂云母等多种熔剂的釉，试验出烧成温度在１２４０℃—１３００℃的低温瓷。在保证瓷器理化性能指标的前提下，将烧成温度降低了１２０℃左右。