共查询到19条相似文献,搜索用时 76 毫秒
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介绍了在低碳经济的大环境下,我国建筑卫生陶瓷的发展方向和出路,提出了低温快烧是建筑卫生陶瓷低碳经济下正确的选择,对我国建筑卫生陶瓷低温快烧历史、成绩与现状作了综述,并且详细介绍了低温快烧的原料和配和对乳浊釉和窑炉提出具体要求。 相似文献
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目前我国建筑卫生陶瓷在产量、质量、品种和工艺技术等方面均得到较快的发展。但是与发达国家相比差距仍很大,其主要问题是烧成温度高,烧成周期长,窑炉热损耗大、能耗高等,而低温快烧技术的开发正是解决这些问题的关键。国家对卫生陶瓷的低温快烧技术非常重视,已列入“八五”规划,并投入大量的人力、物力进行研究。 相似文献
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简要说明了卫生陶瓷实现快速烧成的必要性及其发展状况,着重介绍了快烧隧道窑中各阶段的截面分布全面分析了均衡卫生陶瓷快烧隧道窑截面温度的具体措施。 相似文献
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建筑陶瓷低温快烧原料的选择 总被引:1,自引:0,他引:1
本文从烧成理论和生产实践两方面出发,全面论述了建筑陶瓷低温快烧工艺对其原料的性能要求,分析了原料低温烧成和快速烧成两种性能之间的辩证关系,提出了选择低温快烧原料时要注意的若干现实问题及其正确的选择原则。 相似文献
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低温快烧卫生陶瓷的坯釉配方实例 总被引:1,自引:0,他引:1
本文设计了适用于卫生陶瓷的低温快烧的坯料配方和二种与此种坯体适应的半熔块磷锆乳浊釉,它们不仅降低了烧成温度,而且降低了卫生瓷成本,是切实可行的方法。 相似文献
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以自蔓延高温合成的AIN粉体为原料,Y2O3、Dy2O3、La2O3为添加剂,采用真空热压烧结工艺,实现了含有添加剂的AIN陶瓷体的低温烧结;研究了烧结温度对AIN烧结性能的影响。用XRD、SEM对AIN高压烧结体进行了表征。研究表明:粉体粒径、烧结工艺、烧结助剂对AIN陶瓷低温烧结真空热压烧结性能有很大影响;含烧结助剂的真空热压烧结能够有效降低AIN陶瓷的烧结温度并缩短烧结时间,使烧结体的结构致密。烧结温度1550℃条件下,真空热压烧结90min时,得到的AIN陶瓷的致密度最高。 相似文献
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《Ceramics International》2017,43(12):9178-9183
Low temperature preparation of CaCu3Ti4O12 ceramics with large permittivity is of practical interest for cofired multilayer ceramic capacitors. Although CaCu3Ti4O12 ceramics have been prepared at low temperatures as previously reported, they have rather low permittivity. This work demonstrates that CaCu3Ti4O12 ceramics can not only be prepared at low temperatures, but they also have large permittivity. Herein, CaCu3Ti4O12 ceramics were prepared by the solid state reaction method using B2O3 as the doping substance. It has been shown that B2O3 dopant can considerably lower the calcination and sintering temperatures to 870 °C and 920 °C, respectively. The relative permittivity of the low temperature prepared CaCu3Ti4−xBxO12 ceramics is about 5 times larger than the previously reported results in the literature. Furthermore, the dielectric loss of the CaCu3Ti4−xBxO12 ceramics is found to be as low as 0.03. This work provides a beneficial base for the future commercial applications of CaCu3Ti4O12 ceramics with large permittivity for the cofired multilayer ceramic capacitors. 相似文献
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《Journal of the European Ceramic Society》2022,42(6):2820-2826
5G and forthcoming 6G communication systems require dielectric ceramics with low relative permittivity (εr) and near-zero temperature coefficient of resonant frequency (τf) for the lower part of the microwave (MW) band and at sub-Terahertz. Mg2Al4Si5O18 (MAS) ceramics are promising candidates due to their low εr (~ 6) and high-quality factor (Q×f > 40,000 GHz) but have a large τf. In this study, 5.5 wt% TiO2 (MAS-T5.5) was used to adjust τf of MAS to ?2.8 ppm/℃ whilst retaining low εr (5.24) and good Q×f (33,400 GHz), properties consistent with those obtained by infrared reflectance. A demonstrator microstrip patch antenna with gain 4.92 dBi and 76.3% efficiency was fabricated from MAS-T5.5. 相似文献
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《Journal of the European Ceramic Society》2019,39(15):4988-4995
The price of lithium-containing minerals and other chemical materials continues to increase, resulting in an increase in the production cost of Li2O-Al2O3-SiO2 (LAS) system glass-ceramics. In the LAS glass-ceramics component, the reduction in the amount of Li2O used can reduce the cost of the product. It is worthwhile to study whether it is possible to prepare glass-ceramics with low expansion properties under low Li2O content. The effect of Li2O content on the glass-ceramics of LAS system was studied. In this paper, spodumene was used as the main raw material, and TiO2 and ZrO2 were added as crystal nucleating agents to prepare transparent glass-ceramics with low expansion coefficient. The effects of the change of Li2O content on the crystal phase and microstructure of glass-ceramics were investigated by XRD, DSC, FTIR and SEM. The results show that the main crystalline phase of the low expansion transparent glass-ceramics is β-quartz solid solution. When Li2O content is in the range of 2.99 wt% to 4.13 wt%, low expansion glass ceramics can be prepared by an appropriate method. With the increase of Li2O content, the average coefficient of thermal expansion (CTE) in the temperature range of 30 °C–300 °C shows a decreasing trend. When Li2O content is in the range of 3.51 wt% to 4.13 wt%, the thermal expansion coefficient of the glass ceramics is extremely small, and even a negative expansion coefficient occurs. 相似文献
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《应用陶瓷进展》2013,112(1):20-24
AbstractAbstractLow temperature sintering of α‐Si3N4 matrix ceramics was developed in the present study using 4?wt‐%MgO together with Al2O3 or AlPO4 as the sintering additives and spark plasma sintering technique. The results suggested that α‐Si3N4 ceramics could be densified at low sintering temperature by adjusting both the sintering temperature and sintering additive content. For low temperature sintered α‐Si3N4 ceramics, using MgO and Al2O3 as the sintering additives, the densification is not complete at a temperature lower than 1600°C, and the mechanical strength is <200?MPa. When MgO and AlPO4 were used as the sintering additives, the increase in AlPO4 content not only declines the sintering temperature but also promotes the mechanical property of the sintered Si3N4 ceramics. It was the AlPO4 phosphate binder that played a significant role in low temperature sintering of Si3N4 ceramics. 相似文献
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建筑卫生陶瓷产品市场竞争新趋势--文化营销 总被引:1,自引:0,他引:1
随着我国建筑卫生陶瓷产品市场竞争的加剧,人们将眼光投向“文化”,“文化”将成为建筑卫生陶瓷市场营销中不可缺少的一部分,在营销中占据越来越重要的位置。本文从产品文化、品牌文化、企业文化三个方面分析了建筑卫生陶瓷产品的文化营销。 相似文献