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对以振动成型法和静力成因法成型的硅质陶瓷浇注料的机械性能做了研究,所采用的结合剂不加入或者加入5%耐火粘土的石英砂质高稠度陶瓷结合剂悬浮液,除了上述因素之外,在其它条件完全相同的情况下,结合剂含量对材料的气孔率和强度具有显著影响,结合剂含量波动国范围介于10% ̄33%之间,对于在1200℃ ̄1300℃烧成后的陶瓷浇注料来说,在气孔率为12 ̄16%时其耐压强度σck为50MPa ̄60MPa。分析了材 相似文献
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对以振动成型法和静力成型法成型的硅质陶瓷浇注料的机械性能做了研究。所采用的结合剂为不加入或者加入5%耐火粘土的石英砂质高稠度陶瓷结合剂悬浮液。除了上述因素之外,在其它条件完全相同的情况下,结合剂含量对材料的气孔率和强度具有显著影响。结合剂含量波动范围介于10%~33%之间。对于在1200℃~1300℃烧成后的陶瓷浇注料来说,在气孔率为12%~16%时其耐压强度σ_(сж)为50MPa~60MPa。分析了材料的气孔率对其强度的影响。 相似文献
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制订了采用石英砂高稠度陶瓷结合剂悬浮液制造高气孔率硅质泡沫浇注料的配料组成及工艺,以及向其中加入水玻璃的铬铁生产的废渣。成型料系统为经过矿化处理的泡沫,系自凝固性料,其特点是水分较低。在成型和干燥过程中材料几乎不发生收缩。 相似文献
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制订了采用石英砂高稠度陶瓷结合剂悬浮液制造高气孔率硅质(SiO_2>90%)泡沫浇注料的配料组成及工艺,以及向其中加入水玻璃和铬铁生产的废渣。成型料系统为经过矿化处理的泡沫,系自凝固性料,其特点是水分较低。在成型和干燥过程中材料几乎不发生收缩。气孔率为65%~75%的泡沫浇注料干燥后的耐压强度为0.8~1.2MPa,烧成后的耐压强度为5MPa~15MPa。最高使用温度为1200℃~1300℃。 相似文献
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用自制的5种新型固态复合结合剂进行了浇注料的试验,研究结果表明:这5种固态结合剂所结合的浇注料性能优良,并能解决一般化学结合剂高温下收缩较大的问题。 相似文献
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《应用陶瓷进展》2013,112(3):99-102
AbstractThe applicability of electrophoretic deposition (EPD) for the fabrication of single layer and multilayer ceramic coatings on dense ceramic composite materials has been examined. Al2O3/Y-tetragonal zirconia polycrystal (TZP) functionally graded composites of tubular shape were successfully coated with a two layer coating comprising porous alumina and dense reaction bonded mullite layers. The dual layer coating structure was designed to eliminate the numerous cracks caused by volume shrinkage during sintering of the individual EPD formed layers. In another example, mullite fibre reinforced mullite matrix composites were coated with a thin layer of nanosized silica particles using EPD. The aim was to achieve a compressive residual stress field in the silica layer on cooling from sintering temperature, in order to increase composite fracture strength and toughness. The EPD technique proved to be a reliable method for rapid preparation of single layer and multilayer ceramic coatings with reproducible thickness and microstructure on ceramic composite substrates. 相似文献
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Results are provided for a study of the development of high-temperature mullite-zirconium ceramic with use of activated ceramic
powders prepared by grinding for different times with addition of illite clay, and from pure oxide powders. It is shown that
increased activity and amorphicity of ground particles considerably promotes formation of mullite phase at 1200°C, and also
transition of the monoclinic modification of ZrO2 to tetragonal, particularly with an increase in firing temperature. It is proposed that as a result of rapid “freezing” the
structure retains the high-temperature modification of ZrO2, having a tendency with slow ceramic cooling to transform into the monoclinic modification. 相似文献
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传统陶瓷艺术是历史文化的结晶,是东方审美艺术的体现.现代陶艺是在传统陶瓷基础上发展而来,它不仅继承了传统陶瓷的造型精髓,经过手工匠人的打造更是把传统文化和现代工艺完美融合,形成独特造型风格.本文主要针对传统类陶瓷与现代陶艺造型特点进行研究,发掘传统类陶瓷造型与现代陶艺的互通性,促进传统陶瓷造型和现代审美完美融合,为相关... 相似文献
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众所周知,原料是陶瓷工业的基础,原料质量的优劣是影响坯、釉料工艺性能,以及生产工艺控制和产品性能的一个重要因素。因此,了解并掌握各类原料的性能和作用对于正确选择原料,制定合理的配方和确定适当的工艺流程有重大的实际意义。在实际生产中,当配方确定后(在其他工艺条件不变的情况下)原料化学成分的改变,就会引起物质结构的变化以及瓷体岩相间量比的变化,同时也会改变产品的整体性能,如高温液相粘度、热膨胀系数、产品白度、光泽度、热稳定性、机械强度等。所以原料的组成和物理性能的稳定对陶瓷产品质量的稳定起决定性的作用。因此,如何科学地选择、鉴别和利用日趋减少的、不可再生的矿产资源,一直是业内同行十分关注的问题。笔者结合生产实践,通过2000多次对原料的外观、化学成分、有机物、烧结性、解胶性等方面性能的检测,得出一些经验体会愿与同行探讨。 相似文献
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The composition of a stiff molding mixture has been developed for making concrete ceramic solid brick by press molding or vibrocompression. The brick has a standard size, beige or light red color, and meets the requirements of GOST 530–95. The production cost of this brick is 30–35% lower than that of analogous ceramic bricks because the firing operation is excluded from the production cycle. 相似文献