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高压电瓷是高压输变电线路上的重要组成部分。随着国民经济的高速发展,高电压等级不断提高,超高压、特高压、大电流、大跨距电力线路不断涌现,因而对高压电瓷的性能(特别是机械强度)要求越来越高。我公司普通高压电瓷早已不再生产;高强瓷也已经在湿法生产的基础上,发展到湿法、干法(等静压)同时生产;目前等静压生产超高强瓷,适应了电力行业对电瓷绝缘子越来越高的要求。 相似文献
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在高压电瓷生产过程中会产生的大量废气、废水、和固体废物对环境造成污染。本文从生产工艺、污染的种类及处理措施等方面论述我国高压电瓷行业应该注意的问题,为高压电瓷的生产提供借鉴。 相似文献
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本文介绍了承德粘土的矿源及储量的考察情况,对该粘土的矿石类型,矿物成份及理化性能指标进行了详细的分析。并深入研究了承德粘土在高压电瓷泥料配方中的应用,提高了高压电瓷产品的性能,降低了产品的成本。 相似文献
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硅灰石是一种新型的工业矿物,它以独特的矿物质学、物理化学性质而广泛用于陶瓷 、涂料、、橡胶、冶金铸造、磨料、电焊条、玻璃、矿棉等工业部门中。在石棉代用品方面,硅灰石是理想的原料。 随着科技的不断发展,对硅灰石的应用研究日益深入。硅灰石磨细方法的改朝晖 以及超大型细料级硅灰石粉料的获得,将不断地开拓硅灰石新的应用领域。 硅灰石在陶瓷工业中的应用于:可生产釉面砖、卫生瓷、日用瓷、美术瓷、电力瓷、高频低耗无线电瓷、化工陶瓷、釉料、色料、玻璃模具等 。硅灰石用于陶瓷工业中的主要作用有:( 1)降低烧成温度;… 相似文献
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以高压绝缘电瓷材料的研究现状为基础,系统总结电瓷研究的成果,阐述了电瓷材料未来发展的趋势,分析了我国高压电瓷性能偏低的主要原因。指出高强度铝质电瓷材料是瓷绝缘子研究的方向,重点是以复合材料理论为指导,提高铝质电瓷的制作工艺和综合性能。 相似文献
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通过共混法向硅橡胶中加入玻璃粉与硅灰石,制备了可瓷化硅橡胶复合材料,并对烧蚀后的复合材料的性能进行了研究。结果表明,复合材料在600-1 000℃烧蚀均可形成瓷化材料,当玻璃粉和硅灰石的用量均为50份时,复合材料的成瓷效果较佳。在烧蚀过程中硅灰石与玻璃粉发生低共熔反应,形成了羟基磷灰石的晶相结构。复合材料的吸水率、孔隙率、体积密度和抗弯强度分别可达4.8%,8.2%,1.71 g/cm3,26.6 MPa。随着玻璃粉用量的增加,复合材料的拉伸强度降低,扯断伸长率升高,邵尔A硬度减小,体积电阻率与表面电阻率降低。 相似文献
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Camila Tavares Brasileiro Sonia Conte Flávia Contartesi Fábio Gomes Melchiades Chiara Zanelli Michele Dondi Anselmo Ortega Boschi 《Journal of the European Ceramic Society》2021,41(11):5755-5767
Strong fluxes are needed to fire vitrified ceramics at temperatures significantly lower than those usually reached in industrial firing cycles. This work is aimed at understanding the role of strong fluxes in the microstructural evolution during sintering. Six fluxes (colemanite, ulexite, wollastonite, diopside, spodumene and phonolite) were individually added to a porcelain stoneware batch and processed in standard conditions. Compacts and fired bodies were characterized by optical dilatometry, XRD-Rietveld, SEM and measuring technological properties. Strong fluxes change the firing behaviour with a complex interplay of sintering kinetics, microstructural features, and phase composition. Every flux has its own repercussion on the properties of the liquid phase (chemical composition, degree of polymerization, viscosity and surface tension) which are key points to explain the observed microstructure, densification rates, and stability at high temperature. Batches with phonolite, wollastonite or diopside exhibit characteristics closer to standard porcelain stoneware, while spodumene and borates suffer from unsatisfactory microstructures and lower densification efficiency. 相似文献
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将针状硅灰石和尼龙6经双螺杆挤出机熔融共混,制备了硅灰石/尼龙6复合材料。研究了硅烷偶联剂种类、偶联剂质量分数、共混工艺条件和硅灰石质量分数对复合材料性能的影响。用光学显微镜和扫描电子显微镜分别观察了硅灰石共混前后的形貌和硅灰石/尼龙6复合材料冲击试样断面的形貌。结果表明:用KH-550预处理的硅灰石比KH-560预处理的硅灰石制备的硅灰石/尼龙6复合材料的力学性能好。硅灰石采用侧喂料和较低的螺杆转速制备硅灰石/尼龙6复合材料,可以提高硅灰石/尼龙6复合材料的力学性能。随着硅灰石质量分数的增加,复合材料的力学性能提高。 相似文献
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将针状硅灰石、马来酸酐接枝聚丙烯(PP-g-MAH)和等规聚丙烯(iPP)经双螺杆挤出机熔融共混,制备了iPP/硅灰石复合材料。研究了共混工艺条件、PP-g-MAH和硅灰石用量对iPP/硅灰石复合材料力学性能和熔体质量流动速率的影响;用光学显微镜和扫描电子显微镜分别观察了硅灰石共混前后的形貌和iPP/硅灰石复合材料冲击试样断面的形貌。实验结果表明:硅灰石采用侧喂料和较低的螺杆转速,可以提高iPP/硅灰石复合材料力学性能。随着硅灰石质量分数的增加,复合材料的力学性能提高。在PP-g-MAH质量分数为1%,硅灰石质量分数为30%时,iPP/硅灰石复合材料力学性能最好。 相似文献
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Martín A. Encinas-Romero Salvador Aguayo-Salinas Jesús L. Valenzuela-García Sandra R. Payán Felipe F. Castillón-Barraza 《International Journal of Applied Ceramic Technology》2010,7(2):164-177
The effect of wollastonite amount on the mechanical and bioactive properties of several hydroxyapatite-wollastonite sintered composites was evaluated. The wollastonite reinforcement effect was assessed by measuring hardness and reduced elastic modulus on the materials, using nanoindentation methods. Bioactive properties were analyzed by soaking these materials in a simulated body fluid (SBF) for various periods of time. The analyses reveal an enhancement of hardness and reduced elastic modulus with the addition of wollastonite. In addition, the interaction of these materials with an SBF produces a bone-like apatite layer on their surfaces, which is thicker when the wollastonite is in a higher proportion. 相似文献
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Gang Ma Xigui Yue Shuling Zhang Changru Rong Lifeng Wang Guibin Wang Hongliang Wang 《Polymer Engineering and Science》2011,51(6):1051-1058
The wollastonite was grafted with different silane coupling agents, which could improve interface adhesion. Wollastonite and modified wollastonite‐reinforced poly(ether ether ketone) (PEEK) composites were prepared by melt blending. The mechanical properties, rheology behavior, and thermal properties of the composites were investigated. The modified wollastonite‐reinforced PEEK composites exhibited better mechanical properties than the unmodified wollastonite‐reinforced PEEK composites based on good interfacial adhesion. The composites had lower activation volume and complex shear viscosity. Furthermore, the modified wollastonite‐reinforced PEEK composites had higher crystallization peak temperature (Tc) and crystalline fraction (χc) compared with the unmodified wollastonite‐reinforced PEEK composites. This study shows that the traditional silane coupling agents could effectively improve the performance of PEEK composites. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers 相似文献
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用各种改性剂对超细硅灰石粉体进行改性,通过双螺杆挤出机与聚丙烯进行混合改性造粒,在扫描电镜中观察了硅灰石与塑料的结合情况,对注塑试样测试并分析了相关性能,同时与滑石等其他无机粉体改性PP材料进行了对比,结果表明:硅灰石改性PP具有更好的力学性能和耐刮擦性能。 相似文献