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对玛瑙级氢氧化铝工业化生产设计进行了简要介绍。设计中采用了多项新技术、新设备及新材料,工艺先进,采用DCS全流程自动控制,生产的玛瑙填料多项技术指标处于国内外先进水平。 相似文献
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高档卫生陶瓷玛瑙红色釉研制 总被引:1,自引:1,他引:0
本实验通过颜料本身属性、基础釉成份、添加剂种类、烧成气氛、工艺因素对玛瑙红色料在釉中呈色影响的研究,成功研制了市场较为流行的色釉产品——高档玛瑙红色釉产品。研制结果表明:在氧化气氛下,石灰石质生料釉较适宜玛瑙红色料呈色,添加部分铅的化合物可使色调更趋于鲜艳明快,且玛瑙红色料喜钙、硅,厌镁、锌、铝,尤其适应硼、钡化合物。 相似文献
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在硫酸法钛白研磨-浸出耦合工艺条件下,研究了4种常用陶瓷材料磨球,即氧化锆(ZrO2)、氧化铝(Al2O3)、玛瑙球(SiO2)和氮化硅(Si3N4)的腐蚀和磨损行为及其共同作用规律。结果表明,在磨浸耦合体系中,氮化硅球受腐蚀作用最明显,其次是氧化铝球,而氧化锆球和玛瑙球受腐蚀作用较小。氧化锆球和玛瑙球磨损主要表现为球球碰撞和表面切削;氧化铝球为磨料磨损,矿物的引入会增加磨球的失重速率;氮化硅球由于受到腐蚀和磨料磨损共同作用,导致其表面剥落脱离而产生明显磨损。4种陶瓷磨球因物理磨损造成的磨球失重率均在80%以上,其中氧化铝球和氮化硅球受腐蚀和磨损协同作用明显。氧化铝球和氮化硅球的磨浸失重速率分别为1.76 和14.52 mg·cm-2·d-1,远高于氧化锆球和玛瑙磨球。研究结果为研磨-浸出耦合工艺中磨球材料的选择提供了依据。 相似文献
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Sarah Fest Stefan Reinsch Ralf Mueller 《International Journal of Applied Glass Science》2014,5(3):236-247
The crystallization of 11BaO-25CaO-64SiO2 mol% glass powders and related effects of glass powder milling have been studied by X-ray diffraction (XRD), light and scanning electron microscopy (SEM) and differential thermal analysis (DTA). Glass powders were made by ZrO2 crushing with subsequent sieving or sedimentation or alternatively made by milling with agate, corundum and tungsten carbide. Although surface crystallization was detectable during late sintering, all powders fully sintered. Wollastonite was found as primary crystal phase followed by cristobalite and sanbornite precipitation. The latter crystallization steps caused a second DTA-peak for fine powders. DTA-peak temperatures shifted to lower temperature with decreasing particle size in any case. No significant effects of milling materials on DTA-peak temperatures were evident. As an exception, however, milling in agate caused strongly decreased temperatures of the second DTA-peak. This observation can be explained by the progressive mechanical damaging, which results from the required prolonged milling time with agate due to its small materials density, and the fact that diamond made scratches did promote surface crystallization of cristobalite. The present study thus shows that even for glass powders with excellent sinterability, milling can affect microstructure evolution. 相似文献
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氢氧化铝是玛瑙人造板材的主要组成部分,氢氧化铝的结晶形态、粒度分布等对玛瑙板材的力学及其他性能有着重要影响,选择合适的氢氧化铝作填料将改善板材的性能。 相似文献
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Bhushan M. Khadilkar Shobha D. Borkar 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1998,71(3):209-212
Lewis acids such as FeCl3 and ZnCl2 were supported on silica gel, alumina, zirconia and titania by co-grinding with anhydrous Lewis acids in appropriate proportions in an agate mortar. The catalysts have good shelf life and reusability. Synthesis of diphenylmethanes with these catalysts was studied; silica gel was the best support. © 1998 SCI 相似文献
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新型室温固化引发体系在玻璃钢中的应用 总被引:2,自引:0,他引:2
本文研究了一种新型不饱和聚酯玻璃用室温固化引发体系的固化活性,固化玻璃钢制品的机械性能,耐老性能及其产品色泽的影响。结果表明,与常用的过氧化环己酮/环烷酸钴体系相比,该本系固化能好,颜色浅,耐老化性强,能广泛用于透明胶衣,人造大理石,人造玛瑙等领域。 相似文献
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Guohua Wu Haiyun Jiang Jiacheng Li Weiran Zhang Ruomei Wu Weili Zhang 《International Journal of Applied Ceramic Technology》2023,20(3):1557-1570
Malayaite (CaSnSiO5) doped with Cr may be used as a cheap gold-free purple red pigment to substitute the purple of Cassius. Different molar ratios of Ca/Sn malayaite doped with Cr were prepared and various characrizations were employed. The results indicate that the pigment is composed of CaSnSiO5 and SnO2 when the molar ratio of Ca/Sn is 0.8, and the color is close to agate red color. When the molar ratio of Ca/Sn is 1.25, the phases CaSnSiO5, SnO2, and Ca3SnSi2O9 exist simultaneously, while the color is yellow or yellowish colors. Excessive Ca(II) increases the normal calcination temperature of pigment, from 1080°C to 1130°C. The distribution of chromium ions on the sample surface varies greatly with the change in Ca/Sn molar ratio. The theoretical formulation was obtained based on the stoichiometric formula of CaCrxSn1–xSiO5 by using response surface methodology (RSM). According to the RSM model, the relationship between the molar ratio of Cr/Sn/Ca and the color property was established. The desired pigment formulation (rendering agate red) color is that the molar ratio of Cr/Sn/Ca is 0.010:1.003:0.800. The accuracy of the models was confirmed with analysis of variance, the simulation results were verified again by experiments. 相似文献
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In order to improve shape selectivity of the methanol to ethylene conversion and mitigate coke formation, the acid sites located
on the external surface of Ni‐SAPO‐34 crystals were neutralized by the intrinsic mechanochemical method. Ni‐SAPO‐34 crystals
were mixed in an agate mortar with basic alkaline or alkaline earth metal oxides supported on microspherical non‐porous silica.
Their catalytic performances in methanol conversion were enhanced, especially in the case of BaO‐modified catalyst. The reason
was verified by adopting the cracking of t‐butylbenzene, which could not access into the pore channel due to its bulky molecular size. These changes in the reaction
performance consistently could be ascribed to the decrease of the acid sites on the external surfaces.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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《国际聚合物材料杂志》2012,61(12):979-987
A nanocomposite of polyaniline-titanium dioxide (PANi-TiO2, 50 wt%) was doped with camphor sulfonic acid (CSA) by solid state reaction with increasing CSA content up to 50 wt% in a smooth agate mortar. CSA doped PANi-TiO2 was dissolved in m-cresol and films were cast using a spin-coating technique. The doping effect of CSA on PANi-TiO2 nanocomposite was characterized and evaluated by X-ray diffraction pattern (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and electrical conductivity measurement. The XRD spectra showed that the addition of CSA has no effect on crystallinity of PANi-TiO2. SEM studies revealed that CSA has a strong effect on morphology of PANi-TiO2. The FTIR spectra revealed the interaction between CSA and PANi-TiO2 nanocomposite. Electrical conductivity measurements indicated that with the increasing content of CSA, the conductivity shows an orderly increase. 相似文献
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Maria Elena Leyva Guilherme M. O. Barra Marianna M. Gorelova Bluma G. Soares Marcio Sens 《应用聚合物科学杂志》2001,80(4):626-633
Polyaniline was doped with dodecylbenzenesulfonic acid (Pani · DBSA) in an agate mortar and used as a conductive additive in melt blends with styrene–butadiene–styrene (SBS) block copolymer. These blends exhibit relatively high levels of electrical conductivity at low‐weight fractions of the polyaniline complex. The melt blending process, performed in a two‐roll mill or in a Haake internal mixer, increased the protonation degree of the Pani · DBSA, as indicated by X‐ray photoelectron spectroscopy analysis. This result confirms the occurrence of a second doping process at high temperature. The mechanical performance decreases as the amount of Pani · DBSA in the blend increases, indicating a plasticizing effect of the DBSA. The higher temperature used in blending imparts better conductivity value but gives rise to a strong crosslinked material because of the presence of the sulfonic acid and the high extent of double bonds in the SBS compound. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 626–633, 2001 相似文献