堇青石质蜂窝陶瓷

堇青石蜂窝陶瓷主要用于汽车废气净化催化剂载体及内燃机废气粒子过滤器。本文简述了堇青石蜂窝陶瓷的性能要求，并概括总结了其制造方法以及降低其热膨胀系数的技术途径。     

堇青石质蜂窝陶瓷的制备

选用3种不同的优质粘土、滑石及工业氧化铝,通过一定的工艺控制,在1 390℃的烧成温度、保温4 h的条件下,研制出纯度较高。结晶性较好,热膨胀系数(20～1 000℃)分别为1.48×10-6,1.50×10-6/℃和1.54×10-6/℃,气孔率分别为15％,25％和33％的堇青石质蜂窝陶瓷载体。较低的热膨胀系数保证了载体有优异的抗热震性能,高的气孔率有利于后期催化剂的浸渍。实验表明:堇青石陶瓷成分的选择及杂质相的含量对于膨胀系数影响显著。     

超低热膨胀堇青石质蜂窝陶瓷

本文介绍了堇青石质蜂窝陶瓷的超低热膨胀特点,分析了其超低热膨胀机理,阐述了影响堇青石质蜂窝陶瓷超低胀系数的主要工艺因素,指出制备超低热膨胀系数的堇青石质蜂窝陶瓷的主要途径。     

堇青石质蜂窝陶瓷载体

催化转化器是当前治理汽车废气排放最主要的手段，载体则是其中最基本、最关键的因素。本文对堇青石质蜂窝陶瓷载体的制备、性质及应用等方面作了详细的论述，并指出我国今后应加大力度对其进行开发和研究，以满足日益迫切的环保需要。     

堇青石蜂窝陶瓷热膨胀特性的研究

汽车尾气净化器用蜂窝陶瓷载体对材料的抗热冲击性能要求很高,要求材料具有特别低的热膨胀系数。本文通过对堇青石陶瓷的平均热膨胀系数及微观热膨胀系数的分析,研究了堇青石蜂窝陶瓷的热膨胀特性。     

堇青石蜂窝陶瓷烧成工艺的研究

本文研究了堇青石蜂窝陶瓷的性能随烧成温度和保温时间变化的规律;通过对试样进行Ｘ－射线衍射分析（ＸＲＤ）和扫描电镜观察（ＳＥＭ）,探讨了烧成温度和保温时间对董青石蜂窝陶瓷性能的影响机理。     

酸处理对堇青石质蜂窝陶瓷性能的影响

用硝酸溶液对堇青石质蜂窝陶瓷样品进行处理。测定了酸处理时间不同的样品的热膨胀系数、气孔率和吸水率及抗压强度，研究了酸处理对堇青石质蜂窝陶瓷性能的影响规律，通过SEM分析了酸处理前后样品的断面形貌．并用ICP测定了酸处理液中的各种离子浓度，探讨了酸处理影响性能的机理。试验结果表明：酸处理能显著降低堇青石质蜂窝陶瓷的热膨胀系数，增加显气孔率和吸水率，但削弱了材料的机械强度。     

蜂窝预成型法制造蜂窝夹层结构件

采用蜂窝预成型方法制造了蜂窝A夹层结构制件,通过对外观、厚度、平拉强度和内部质量的检测,结果表明,蜂窝预成型方法能够有效地解决制件因成型压力过大而导致的蜂窝芯侧向塌陷问题,是一种非常有效的工艺方法。     

共固化蜂窝夹芯结构复合材料的蜂窝收缩问题研究

介绍了蜂窝夹芯结构复合材料共固化成型的特点,对蜂窝厚度较大的夹芯结构复合材料的热压罐共固化成型工艺进行了研究。通过将蜂窝边缘使用层压板和蜂窝灌封料组合固定等方法,解决了传统共固化工艺条件下蜂窝滑移、收缩、产生缺陷等技术难题。     

累托石和滑石制备堇青石质蜂窝陶瓷

本研究了采用一种新开发的粘土原料——累托石、滑石和工业氧化铝制备堇青石质蜂窝陶瓷的工艺过程。测定了样品的理化性能，并采用XRD、SEM对样品的相组成和微观结构进行了分析。结果表明，蜂窝陶瓷的主晶相为堇青石，气孔率34．88％，间壁密度达1．72g／cm^3，间壁气孔尺寸为1-20μm，抗热震性达700℃。     

Synthesis of crystalline zeolite-13X from waste porcelain using alkali fusion

We attempted to convert waste porcelain into crystalline zeolite-13X using the alkali fusion method. Waste porcelain is mainly composed of amorphous glass phase and crystalline phases such as quartz and mullite. Most of the amorphous and crystalline phases were converted into soluble phases by alkali fusion, and could be transformed into single zeolite-13X crystals with a high specific surface area (412 m²/g) and unique micropore diameter (13 Å).     

开槽芳纶纸蜂窝芯与有孔芳纶纸蜂窝芯的对比分析

通过压缩性能和剪切性能实验,对同一密度的传统芳纶纸蜂窝芯、开槽芳纶纸蜂窝芯以及有孔芳纶纸蜂窝芯的主要力学性能进行了对比分析。实验表明,同一密度的传统蜂窝芯的压缩性能和剪切性能优于两种特殊蜂窝芯,但两种特殊蜂窝芯的主要力学性能能够达到传统芳纶纸蜂窝芯标准中出厂检验指标值的77%以上,能够满足多数特殊结构的使用要求。对两种特殊芳纶纸蜂窝芯的制造工艺和实际应用进行了对比分析,指出了各自的优势和劣势。两种特殊蜂窝芯的W向剪切模量均高于指标值。开槽蜂窝芯较有孔蜂窝芯制造工艺简单、制造周期短、制造成本低,但有孔蜂窝芯制造精度更高、应用范围更加广泛。     

蜂窝密封的应用

介绍了蜂窝密封结构、密封机理,梳齿密封改蜂窝密封的改造方法,国内外发展应用情况和在镇海炼化首台机组上的改造应用情况。蜂窝密封正从航空领域向工业领域推广应用,与传统梳齿密封相比极具优越性,特别是在高压差密封场合。蜂窝密封在电力、石化行业的汽轮机、压缩机领域里具有广阔的应用前景。     

The sintering kinetics of porcelain bodies made from waste glass and fly ash

Porcelain is a material produced from kaoline, quartz and potassium-feldspar. Recently, research of new materials, for example non-hazardous wastes, that are able to replace traditional fluxing agents without changing the process or quality of the final products has been realized. The aim of this work is to study the possibility of the use of glass powder waste and fly ash together for manufacturing porcelain. Instead of quartz, fly ash was used at the selected porcelain composition. The waste glass was added partially and fully in replacement of potassium-feldspar. Samples were fired in an electric furnace with a heating rate of 10 °C/min at 1100, 1150 and 1200 °C for a period of 1, 2, 3 and 5 h. The sintered samples were characterised by XRD (X-ray diffraction) and SEM (scanning electron microscopy). Sintering activation energies were determined based on the bulk density result. At 10, 15, 20 and 25 wt.% glass waste addition, the apparent activation energies were calculated to be 145, 113.5, 70.4 and 53.74 kJ/mol, respectively. It was found that the sintering activation energy decreased with increasing waste glass addition.     

Correlation between the Izumiyama porcelain ceramics and the red-overglaze enamels of the Kakiemon-style porcelains

The Kakiemon-style porcelains made from 17th century at Arita are famous Japanese porcelains, characterized mainly by their colored underglaze and overglaze and by their original design of coloring spatial patterns in the porcelain surface. Raw materials of the red-overglaze enamels have been investigated by means of X-ray diffraction and X-ray absorption spectra using synchrotron radiations. It is found that Izumiyama porcelain ceramics of yellow color can produce the Kakiemon red-overglaze enamels by thermal treatment and water-washing, where Izumiyama is a collecting place of the raw porcelain ceramic at Arita. The brightness of the red-overglaze enamels is related on the local structure around Fe ions and the electronic band states of Fe ions near a Fermi level in α-Fe₂O₃, in addition to the spatial density of the α-Fe₂O₃ fine particles. The structural and electronic properties are slightly affected by an electron-hybridization between Fe ions of α-Fe₂O₃ and oxygen ions of the (SiO₂–Al₂O₃) complexes in the red overglaze.     

White porcelain material based on diopside

The intention of the present study was to develop an alternative composition for making porcelain material using diopside as the main raw material. Particle size distribution, X‐ray diffraction, X‐ray fluorescence spectrometer, and field emission scanning electron microscope were carried out to characterize the body. Alfa‐quartz, diopside, anorthite, and clinoenstatite were major phases of fired sample. The flexural strength, 131.54 MPa, was two times higher than that of conventional porcelains. During firing, iron ions were diffused into diopside crystal lattice giving the porcelain body a favorable whiteness. It is applicable in preparation of porcelain material using diopside as the main raw material.