用XPS测定汝瓷月白釉挂红中Fe和Cu的形态

本文针对前人对铜红釉和钧红着色的不同研究结果，选用ＸＰＳ对铜和铁在釉中存在形态进行了测定，得到了汝瓷月白釉挂红中着色元素Ｆｅ和铜的ＸＰＳ曲线，由测得电子能谱与其标准谱进行比较得到釉中Ｆｅ是以ＦｅＯ，Ｆｅ３Ｏ４和Ｆｅ２Ｏ３多种氧化物着色，且以Ｆｅ３Ｏ４为主；而Ｃｕ则是以ＣｕＳｉＯ３形态存在，实验没有发现一价铜的２Ｐ３／２电子谱。文章进一步用热力学分析了汝瓷月白釉挂红的烧制工艺，得到与以往用热力学分析     

亚光碎纹釉的研制

本文介绍了亚光碎纹釉的研制情况,根据釉的膨胀系数大于坯的膨胀系数,且Δα值>0.4×10-6以上能形成裂纹的原则,通过合理控制釉的化学成分,确定Si/Al比例,提高其膨胀系数,制得了一种外观视觉效果良好,网状裂纹均匀分布的亚光碎纹釉。     

骨灰瓷烧成制度的研究

根据骨灰瓷烧制理论并结合生产实际,制定出了合理的骨灰瓷烧成制度,生产出了性能优良的骨灰瓷制品。     

高级日用细瓷无铅釉的研制

应用三元系配料的实验方法和玻璃(釉)态物质的性能加合原理,通过科学的配方设计和系统实验,研制出了适合不同材质、不同陶瓷坯体使用的系列无铅釉。在骨质瓷、高石英瓷、镁质强化瓷、精陶坯体上施用,经工业化实验效果良好,各项指标均不低于目前正常生产的含铅釉制品。     

Mechanism of lustre formation in scheelite-based glazes

This work elucidates the mechanism responsible for the lustre effect of scheelite-based glazes for single-firing wall tiles. The surface decoration is obtained with a thin film composed of a Si–Ca–Zn–Al–K–B frit and 10 wt% WO₃ on zircon-engobed substrates for single-firing wall tiles (maximum temperature of 1130 °C for 50 min). The observed lustre effect is sub-adamantine and pearlescent. It is sub-adamantine because scheelite nanocrystals at the surface, with a relatively high refractive index (n = 1.93), cause considerable reflection of light. The lustre is also weakly pearlescent because the nano-crystals oriented with the (004) plane parallel to the surface give interference with the underlying glassy layer (n ≈ 1.5), where randomly dispersed scheelite crystals occur. This model apparently applies to the glazes decorated with ceria, although the latter exhibits iridescence due to the high refractive index of ceria (n = 2.05) which yields stronger interference effect with the underlying glassy substrate.     

Investigation into the wear behaviour of Stellite 6 during rotation as an unlubricated bearing at 600 °C

The wear behaviour of Stellite 6 was studied during rotational sliding in a bespoke bearing rig at 600 °C for times between 2 min and 12 h. Six stages of wear were identified: (i) formation of a mixed oxide ‘glaze’, (ii) cobalt and chromium elemental diffusion to the ‘glaze’ surface forming chromium- and cobalt-dominated oxide layers, (iii) oxygen diffusion into the ‘glaze’ leading to a chromium-dominated oxide layer at the ‘glaze’/substrate interface, (iv) spallation of the ‘glaze’ through chemical failure, (v) re-formation of the ‘glaze’ and (vi) elemental diffusion within the ‘glaze’, again resulting in discrete oxide layer formation.     

降低热喷涂涂层孔隙率的方法

热喷涂的工作原理决定了其涂层孔隙是不可避免的。当涂层用于防腐蚀时,腐蚀介质会通过孔隙到达基体表面,从而造成防护失败。因此,封孔处理是提高涂层防腐蚀性能的重要途径。本文总结了涂层封孔处理的方法,对未来涂层封孔技术进行了展望,并提出一种新的涂层封孔剂——釉。     

薄形陶瓷板釉泡、孔洞影响因素探讨

薄形陶瓷板作为一种可持续发展陶瓷产品越来越受到人们的欢迎.但是,在生产薄形陶瓷板过程中,非常容易产生釉泡、孔洞等缺陷.笔者从各个工序探讨了产生釉泡、孔洞缺陷的影响因素.通过研究发现,产生这些缺陷的主要原因是因为坯体里的硫酸盐和碳酸盐在分解过程中排气不充分导致.最后结果表明:通过在坯体配方中降低高CaO含量的原材料比例原...