平盘过滤机在玛瑙填料系列化产品生产中的应用

论述了玛瑙填料氢氧化铝系列化产品的用途;介绍了平盘过滤机在玛瑙填料系列化产品生产中的应用,并对该设备投入使用后对提高产品质量、降耗、创造经济效益等方面的功效进行了叙述。     

玛瑙之城

玛瑙是大自然馈赠人类的珍宝之一,它深藏于大地的怀抱之中。位于辽西的阜新是闻名世界的玛瑙矿藏区,其出产的玛瑙色泽丰富,纹理瑰丽,品种齐全,而且还产珍贵的水胆玛瑙。阜新很好地利用了资源优势,打造成了享誉全球的“玛瑙之都”。     

玛瑙之城

<正>阜新是享誉全球的玛瑙之都,但将阜新推向世界大舞台的幕后主角却是玛瑙雕手艺人。玛瑙是大自然馈赠人类的珍宝之一,它深藏于大地的怀抱之中。位于辽西的阜新是闻名世界的玛瑙矿藏区,其出产的玛瑙色泽丰富,纹理瑰丽,品种齐全,而且还产珍贵的水胆玛瑙。阜新很好地利用了资源优势,打造成了享誉全球的"玛瑙之都"。     

W—777^#人造玛瑙树脂的研制

本文介绍了W-777~#人造玛瑙树脂的研制及性能。实际试用结果表明,该树脂适合人造玛瑙成型工艺要求,是良好的人造玛瑙树脂。     

玛瑙级氢氧化铝工业化生产设计

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。     

玛瑙染黄色工艺研究

对玛瑙的染黄色工艺进行探讨,使用Fe(NO3)3等试剂浸泡灰白色玛瑙后,再经过适当的加热处理(210℃,3h),得到了颜色较鲜艳的黄色玛瑙.文中详细讨论了染色的机理、过程以及影响因素;并通过对比实验分析了染色的试剂中使用KMnO4具有明显的效果,指出热处理关键是对温度的控制.     

高档卫生陶瓷玛瑙红色釉研制

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。     

人造玛瑙新型材料的研制

一、绪言人造玛瑙是在人造大理石基础上发展起来的一种新型材料。人造玛瑙制品,是由树脂加入玛瑙粉,模仿天然玛瑙的色泽纹理,按照模具的形状浇注,经室温或加热固化而制得。     

不同摩擦偶件对单晶硅摩擦磨损行为影响的对比研究

对比研究A12O3和玛瑙球对单晶硅摩擦磨损行为的影响.结果表明:单晶硅与Al2O3和玛瑙球对摩时.摩擦因数均随滑动速度的增加而降低,二者与单晶硅对摩时的摩擦因数相差很小:与Al2O3和玛瑙球对摩时,单晶硅的磨损体积损失均随滑动速度的增加而减小;在相同实验条件下,与Al2O3球对摩时;单晶硅的磨损体积损失明显大于与玛瑙球...     

铬锡红色剂中铬的价态研究

Ｃｒ－Ｃａ－Ｓｎ－Ｓｉ系玛瑙红颜料是一种稳定的高温陶瓷色剂,它具有稳定的锡榍石晶体结构,本研究采用电子自旋共振,光电子能谱、Ｘ射线衍射分析及分光光度法研究了玛瑙红色剂的呈色机理,结果表明,由于铬的掺杂,Ｃｒ＾４＋置换了锡榍石晶格中的Ｓｎ＾４＋,使「ＳｎＯ６」八面为形,结果导致色剂在反射光谱的可见光５２０ｎｍ周围形成一条宽的吸收带,从而使釉呈玛瑙红色。     

钛铁矿研磨-浸出耦合工艺中陶瓷磨球磨损和腐蚀行为

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。     

Milling,Sintering and Crystallization of 11BaO-25CaO-64SiO2 Glass Powder

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.     

凝胶法制备纳米氧化锆的工艺研究

采用凝胶法制备纳米氧化锆,先以酒石酸铵络合锆离子,再加入氨水使之与络合物充分混合,之后加入双氧水解除络合,生成氢氧化锆凝胶,待凝胶干燥后,高温下煅烧,再将煅烧后的产品和研磨助剂一起研磨,最终得到粒径为80nm的类球形的纳米氧化锆。     

氢氧化铝对玛瑙人造板材性能的影响

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。     

Environmentally clean synthesis of diphenylmethanes using silica gel-supported ZnCl2 and FeCl3

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     

新型室温固化引发体系在玻璃钢中的应用

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。     

A formulation design and preparation of gold-free purple of Cassius based on the doped malayaite

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 CaCr_xSn_1–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.     

Effects of decrease in number of acid sites located on the external surface of Ni‐SAPO‐34 crystalline catalyst by the mechanochemical method

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.     

Camphor Sulfonic Acid Doped Polyaniline-Titanium Dioxide Nanocomposite: Synthesis,Structural, Morphological,and Electrical Properties

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.     

Conducting SBS block copolymer–polyaniline blends prepared by mechanical mixing

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