陶瓷制品激光局部成釉和表面缺陷修复技术

本文综述了激光局部成釉技术的发展、研究现状及应用情况;分析了激光局部成釉技术的加工工艺过程.工艺条件的控制及用于陶瓷制品表面缺陷的修复对填料及工艺操作等要求.     

卫生瓷激光补釉用低温无铅无镉釉料的研究

研究了用激光局部成釉修复卫生瓷表面缺陷及使用的低温无铅镉熔块釉组成、制备工艺和性质。     

卫生陶瓷激光补釉用低温无Pb,Cd填缝料的研究

根据卫生陶瓷激光补釉的要求，首先研究了低温无Ｐｂ，Ｃｄ填缝料的化学组成及制备工艺，并利用各种测试对填缝料的性能进行测试，确定了适合卫生陶瓷激光补釉用无Ｐｂ，Ｃｄ低温填缝料的组成。     

卫生陶瓷重烧工艺的研究

探讨了卫生陶瓷重烧釉的组成,卫生陶瓷釉面缺陷的修补工艺;研究了卫生陶瓷重烧烧成工艺对产品质量的影响,在此基础上提出了卫生陶瓷重烧的烧成曲线。     

卫生陶瓷原料与泥釉料配方

<正>本书分为五章。第1章为绪论,介绍了卫生陶瓷及其生产的基本概念。第2章收集了与卫生陶瓷原料相关的地质、矿物、采矿、选矿方面的一些基础知识。第3章叙述了卫生陶瓷原料的分类、各种坯釉用原料及辅助材料。第4章介绍了卫生陶瓷生产中所涉及的化学成分分析方法、矿物组成测定方法、陶瓷材料性能的测试方法、坯釉原料性能测定方法及原料入厂质量测定方法。第5章叙述了坯釉配方中相关的基础计算、坯釉的性能要求、坯釉配方确定方法及其生产中的维护。本书可供从事卫生陶瓷生产的操作者、技术人员、管理者参考,也可供陶瓷专业的各类学校的教师和学生参考。     

陶瓷色料及其应用技术(二)

２色料的应用技术 在透明釉及乳浊釉料中加入适量的色料即可得到颜色釉。色料在建筑卫生陶瓷中的应用主要是用来配制各种类型的颜色釉,因此色料的应用技术即是颜色釉的配制技术。２．１建筑卫生陶瓷颜色釉的调合２．１．１红色系统色料 铬锡红：铬锡红色料在釉中一般呈现深沉的紫红色调。若需得到鲜艳明快的深红色调,则要求基础釉中：含较高的ＰｂO、ＣａO,但若ＣａO含量过高易使釉面失透甚至无光;不含ＭｇO,因为Ｍｇ２＋会使锡红色料的晶格分解,从而使釉面产生白斑或失透;低Ｋ_2O、Ｎａ_２Ｏ、Ｂ_２O_３含量,这三种成分过多则易…     

卫生陶瓷原料与泥釉料配方

<正>本书内容提要:本书分为五章。第1章为绪论,介绍了卫生陶瓷及其生产的基本概念。第2章收集了与卫生陶瓷原料相关的地质、5广物、采矿、选矿方面的一些基础知识。第3章叙述了卫生陶瓷原料的分类、各种坯釉用原料及辅助材料。第4章介绍了卫生陶瓷生产中所涉及的化学成分分析方法、矿物组成测定方法、陶瓷材料性能的测试方法、坯釉原     

卫生陶瓷原料与泥釉料配方

<正>本书分为五章。第1章为绪论,介绍了卫生陶瓷及其生产的基本概念。第2章收集了与卫生陶瓷原料相关的地质、矿物、采矿、选矿方面的一些基础知识。第3章叙述了卫生陶瓷原料的分类、各种坯釉用原料及辅助材料。第4章介绍了卫生陶瓷生产中所涉及的化学成分分析方法、矿物组成测定方法、陶瓷材料性能的测试方法、还釉原     

高压静电施釉法生产卫生陶瓷

在卫生陶瓷生产中 ,普遍采用人工压力喷釉的方法施釉 ,生产出来的卫生陶瓷产品釉面存在局部釉薄、缺釉、釉脏、波纹、色差等缺陷 ,严重影响了产品的质量、档次、合格率以及操作者的身体健康。这些缺陷难以控制且波动性较大 ,其原因是影响因素多 ,人为因素影响尤为严重。为提高卫生陶瓷产品釉面质量和档次 ,笔者对如何利用高压静电施釉法生产卫生陶瓷作如下探讨。1　试验过程1.1　釉料配方试验釉料采用石英、长石、氧化铝、轻质碳酸钙、白云石、烧氧化锌、锆英粉等原料。主要原料的化学组成见表 1,釉料配方组成见表 2 ,釉料化学组成见表 3。…     

卫生陶瓷原料与泥釉料配方

<正>主编:徐熙武副主编:高建立沈金梅主审:岳邦仁化学工业出版社出版2018.2本书内容提要:本书分为五章。第1章为绪论,介绍了卫生陶瓷及其生产的基本概念。第2章收集了与卫生陶瓷原料相关的地质、矿物、采矿、选矿方面的一些基础知识。第3章叙述了卫生陶瓷原料的分类、各种坯釉用原料及辅助材料。第4章介绍了卫生陶瓷生产中所涉及的化学成分分析方法、矿物组成测定方法、陶瓷材料性能的测试方法、坯釉原料性能测定方法及原料入厂质量测定方法。     

Improving quality and machining efficiency of hole during AlN trepanning with nanosecond pulse laser

Aluminum nitride (AlN) is essential material to electronics industry. Compared to traditional machining methods, laser trepanning has become one of the most popular options for hole machining on AlN. Due to involvement of multiple parameters, such as scanning number, laser beam jump direction, scanning mode, and filling circle interval, the optimization of hole quality is complex. To tackle this problem, this paper systematically studied hole trepanning on AlN using nanosecond pulse laser in order to examine the relationship among trepanning parameters and hole dimensions, quality, and machining efficiency. Thereby, the optimized combination of parameters could be obtained to improve the quality and efficiency of hole machining. Moreover, possible effect mechanisms like effect of laser fluence on hole diameters, effects of jump directions and scanning modes on hole machining quality were discussed. Most importantly, it is the first time that the relationship among trepanning parameters, hole quality, and machining efficiency is presented.     

Synthesis of nanofiber-filled polydimethylsiloxane using ultrafast laser irradiation

In this article, we report the filling of polydimethylsilioxane (PDMS) with nanofibers using femtosecond laser of MHz pulse frequency under ambient conditions. Nanoscale fibrous structure was created by femtosecond laser ablation of silicon. The generated silicon nanofiber was dispersed into PDMS resin. A site-specific curing of PDMS induced by direct laser irradiation results in nanofiber-reinforced polymer. The proposed technique permits single-step curing and is capable of fabricating microscale structures. No additives are used in developing the polymer nanocomposite. Scanning electron microscopy was used to investigate the dispersion of filler (nanofiber) in PDMS matrix.     

Effect of Surface Texture on the Adhesion Performance of Laser Treated Ti6Al4V Alloy

The growing demand in lighter and safer structures generates the requirement of lighter joining strategies, particularly for lightweight metal alloys, composites, and also joining dissimilar materials together. Titanium alloys stand out as the conventional choice for materials for light weight structures. Adhesive bonding of titanium is an appealing route for joint design, also for the possibility of joining it with dissimilar materials. The realization of a strong joint depends not only on the joint design and type of adhesive, but also on the preparation of the adhering surface. Laser texturing presents advantages compared to common surface preparation processes in terms of eco-compatibility, energetic efficiency, ease of manufacturing, and repeatability. This work presents a preliminary investigation on laser texturing of Ti6Al4 V alloy with a pulsed fiber laser source with the aim to increase surface adhesion for bonding. Particularly, different surface textures are proposed, and laser machining strategies are developed. The results showed that laser texturing provided up to eightfold and 30% higher shear strength compared to plain and sand blasted surfaces, respectively. Failure analysis showed that a margin of improvement is still possible by adapting the surface texture for better cavity filling and reducing surface damage caused by the laser treatment.     

Aerosol Imaging with a Soft X-Ray Free Electron Laser

Lasers have long played a critical role in the advancement of aerosol science. A new regime of ultrafast laser technology has recently be realized, the world's first soft x-ray free electron laser. The Free electron LASer in Hamburg, FLASH, user facility produces a steady source of 10 femtosecond pulses of 7–32 nm x-rays with 10¹² photons per pulse. The high brightness, short wavelength, and high repetition rate (> 500 pulses per second) of this laser offers unique capabilities for aerosol characterization. Here we use FLASH to perform the highest resolution imaging of single PM2.5 aerosol particles in flight to date. We resolve to 35 nm the morphology of fibrous and aggregated spherical carbonaceous nanoparticles that existed for less than two milliseconds in vacuum. Our result opens the possibility for high spatial- and time-resolved single particle aerosol dynamics studies, filling a critical technological need in aerosol science.     

CL-20/开口多壁碳纳米管复合含能材料的制备与性能

以开口多壁碳纳米管(SMWNTs)为原料,六硝基六氮杂异伍兹烷(CL-20)为填料,采用超声吸入法制备CL-20/SMWNTs纳米复合含能材料;利用TEM、DSC-TG、XRD对样品进行表征,并对其进行激光点火试验。结果表明,CL-20晶粒填充到SMWNTs内部,填充部位在SMWNTs的端口,呈颗粒状排列。与纯CL-20相比,CL-20/SMWNTs纳米复合含能材料的起始分解温度由原来的239.6℃降至229.6℃,分解峰温也由原来的221.4℃降至173.6℃。CL-20/SMWNTs纳米复合含能材料光敏感性强,激光能量50W时可将其点燃。     

废轮胎热解炭黑与工业炭黑的粒径及化学组成

用激光粒度分析仪测定了废轮胎热解炭黑的粒径分布,用扫描电子显微镜、X-射线衍射法及X-射线光电子能谱法分析了热解炭黑和工业炭黑的形态、表面化学组成以及表面碳元素的结合状况。结果表明,热解炭黑的粒径分布是添加在轮胎中各种型号工业炭黑粒径分布的叠加。热解炭黑表面形态和组成接近于工业炭黑N660;热解炭黑的表面附着更多的有机物以及ZnO、ZnS等无机物,且随着热解温度的升高,附着的有机物含量减小,无机物中ZnO含量减小,ZnS含量增多。     

冬瓜山矿床开采方案优化的数值模拟研究

通过正交试验的方法,运用RFPA数值程序研究了不同开挖步骤、充填体刚度、充填接顶情况对铜陵有色金属公司冬瓜山矿挖稳定性的影响。以采场破坏和峰值载荷为评判依据,试验表明,在给定的数值试验条件下,充填接顶对峰值载荷影响最大,而充填体刚度影响最小,这表明,在冬瓜山矿开采过程中,一定要保证充填的接顶质量。     

基于田口试验法的熔融沉积成型PLA制品工艺优化

为了提高熔融沉积成型(FDM)制品的质量,采用田口试验法研究填充密度、沉积方向和填充图案三个因素对聚乳酸(PLA)制品拉伸性能的影响。结果表明,加工工艺参数对拉伸弹性模量和拉伸强度的影响程度均为沉积方向>填充密度>填充图案,其中拉伸弹性模量最优化的参数组合为填充密度100%、沉积方向45°、填充图案网格形状,拉伸强度最优化的参数组合为填充密度70%、沉积方向45°、填充图案网格形状。通过扫描电子显微镜对拉伸试验失效断面进行观察分析,探究了FDM打印工艺参数之沉积方向、填充密度对PLA试样拉伸失效的影响及其失效机理,其表征分析与试验结果高度吻合,表明该研究结果具有较好的借鉴意义。     

薄壁塑件的填充性及流道系统分析

简要介绍大型薄壁塑件填充性能的影响因素,并借助于数值模拟技术对薄壁塑件进行了填充分析,在分析基础上对填充性与流道的相关性进行研究.从分析结果可知,流道的设计对薄壁塑件的可填充性能影响非常显著,从而为促进大型薄壁塑件的可填充性提供了借鉴作用.