酷玩

1. 1．5亿像素照片之源 GigaPan Epic底座在奥巴马就职典礼之后,很多人都曾见过一张59783×24658像素（14．74亿像素）的巨幅数码照片,连每个人的脸都看得清楚!这是怎么做到的？在目前的技术下,任何相机都不可能一蹴而就。事实上,最大的功臣不是作为拍摄工具的具备1460万像素的佳能Power Shot G10,而是当时与它连接在一起的GigaPan Epic底座。     

酷玩

1 Powermat无线充电器数码产品居然也能进行无线充电？这看上去很神奇,但事实上它们并不具备无线充电的能力,Powermat所能做的就是为iPhone、黑莓手机、iPod等提供一个共享的无线充电接收器底座,而笔记本电脑、数码相机、PSP、NDS等则还需要一个适配器,除笔记本电脑是专门的接收器外,其他的均可在无线充电底座上随意摆放。这样的确能够减少充电器、电线的数量,让环境更整洁,但那些适配器却让我们有种被忽悠的感觉……     

酷玩

1 Powermat无线充电器数码产品居然也能进行无线充电？这看上去很神奇,但事实上它们并不具备无线充电的能力,Powermat所能做的就是为iPhone、黑莓手机、iPod等提供一个共享的无线充电接收器底座,而笔记本电脑、数码相机、PSP、NDS等则还需要一个适配器,除笔记本电脑是专门的接收器外,其他的均可在无线充电底座上随意摆放。这样的确能够减少充电器、电线的数量,让环境更整洁,但那些适配器却让我们有种被忽悠的感觉……     

Hot Fowability and Hardening Time of Hot Self-flwing Repair Mixes

Hot repair technique is more and more paid close attention to by refractories customers.Some factors havng an effect on hot flowability and hardening time of hot self-flowing repair mixes are discussed in this paper,These factors include different organic binders,amount of binder and graphite etc .Meanwhile,expermental methods measuring hot flowability and hardening time is introduced,and hardening sinter mechanism of the mixes is approached to .     

热风炉炉衬热态修补技术

热风炉作为高炉附属设备,要求服役1-2代高炉炉龄,而热风炉实际使用寿命常由热风炉系统耐材内衬决定.耐材内衬在使用过程中经常出现问题,耐材内衬在线热态修复是延长热风炉耐材使用寿命的有效方法.本文对热风炉系统耐材内衬常见的修复方法及修复用材料进行了介绍.     

Hot Extrusion of Ceramics

Two dense ceramics, Bi₂Sr₂CaCu₂O_{8+ X} and 2Y-TZP: 10 wt% Al₂O₃, were hot-extruded through conical dies under a wide range of conditions. Extrusion of Bi₂Sr₂CaCu₂O_{8+ X} was performed at 775° to 825°C and speeds of 0.0005 to 0.2 mm/s, with the die semi-angles from 30° to 60° and extrusion ratios from 4 to 9. Extrusion of 2Y-TZP:10 wt% Al₂O₃ was performed at 1650°C and 0.017 mm/s. During hot extrusion of Bi₂Sr₂CaCu₂O_{8+ X} , a strong texture was developed with the basal plane aligned along the extrusion direction, whereas the zirconia/alumina composite underwent grain growth which resulted in strain hardening. A simple analytical extrusion model for strain-rate-sensitive materials has been developed using a combined slab method and upper-bound method and a power-law material flow equation. The model predictions are in good agreement with the experimental results and they further serve to delineate the limitation of the extrusion technique for ceramic applications.     

热流道技术

介绍注射模热流道技术。热流道分为用于单型腔模具的热喷咀元件和用于多型腔或单型腔多点进料的热流道组件，该组件由热流道板和热喷咀构成。在热流道组件设计中应考虑热流道板尺寸、加热元件配置及功率、热流道板的膨胀和绝热及浇口。分析表明，对于ＩＮＣＯＥＨＩＢ３０００、５０００系列喷咀，热流道宽１００ｍｍ，厚５０ｍｍ，长按离中心最远的喷咀体至流道板边缘保持２５ｍｍ的距离予以确定，流道直径１２．５ｍｍ，加热元件可按Ｉ、Ｈ、Ｘ、Ｔ和Ｙ型布置，按经验，成型温度１９０～２０５℃的树脂，单位体积热流道板所需热量１．８～２．２Ｗ／ｃｍ３，成型温度２０５～２６０℃的树脂取２．３～２．７Ｗ／ｃｍ３，成型温度２６０～３１５℃的树脂取２．８～３．２Ｗ／ｃｍ３，热电偶测量点与流道距离不大于１０ｍｍ，通过冰箱蔬菜盒模具改造的效益分析，表明安装热流道系统后，生产冰箱菜合塑料件５万件所取得的经济效益是投入的３．４倍以上。     

L型热熔胶的研制

研制的SG010-C和SG010-X型催化剂,对氢气敏感性好,用于乙烯均(共)聚制L型热熔胶。在聚合过程中,通过改变催化剂的结构和氢调,控制聚合物的熔体指数、分子量分布、颗粒度、熔点等。可一步生产出热熔胶粉末,不经粉碎分级。     

Hot Corrosion of Silica

The high-temperature corrosion of bulk silica glass was studied in pure oxygen and in SO₃-containing oxygen atmospheres in the presence of liquid sulfate deposits at temperatures of 700° and 1000°C. No reaction and devitrification were observed without Na₂SO₄ on the surface. The wetting of the silica by the sulfate, the tendency toward basic fluxing, and the crystallization of the silica incrased with the activity of Na₂O. The most extensive degradation of vitreous silica occurred by crystallization, and the resulting spalling under basic conditions and thermal cycling at basic conditions were parabolic. This behavior is explained by a model in which the crystallization is controlled by sodium at the glass-crystal interface and its diffusion into the glass. This sodium diffuses into the glass before crystallization and is swept ahead of the crystallization front.     

热熔胶粘剂

叙述了热熔胶粘剂的特点、组成,并叙述了国内已批量生产的几种热熔胶的生产方法和实际应用。对该类胶粘剂的发展提出了一些看法。     

Hot Isostatic Pressing of Alumina and Examination of the Hot Isostatic Pressing Map

The hot isostatic pressing (HIP) of four alumina powders is studied in the temperature range 1100° to 1400°C, at 5- to 200-MPa applied pressure, and for times ranging from 0.5 to 4 h. Density increases with increasing HIP temperature, pressure, and time; decreasing grain size results in increased density after HIP. An empirical relation is derived for grain growth during HIP, and the HIP map proposed by Helle et al. is found applicable to the present results. Densification is governed by the grain-boundary diffusion of aluminum ions; with the transport coefficient and the grain-growth values found in the present study, the map can be used to express experimental results to within a factor of 4 for all densification stages except near full density.     

干、湿热气候环境塑料自然老化试验与研究

通过几种塑料制品在干、湿热气候环境老化试验,指出了试件在严酷干热与湿热气候环境的老化速度与高分子聚合物材料自身结构、添加剂配方等密切相关;同时指出在严酷干热环境中试件的老化速率比其他气候区域高。     

Hot embossing of discrete microparts

The hot embossing process has so far been developed mainly for replication of surface structures on thermoplastic substrates. Because of the lack of a through‐thickness action, fabrication of discrete microparts such as microgears is considered difficult. In this study, embossing molds having multiple microcavities were used in a through‐thickness embossing process with a rubber‐assisted ejection mechanism. Microparts made of HDPE and ABS with each part weighing approximately 1 and 1.4 mg, respectively, were produced. When in the mold, embossed microparts were intermittently connected to each other through thin residual films of a thickness approximately 20 μm. The residual films were detached from the microparts during a rubber‐assisted ejection stage. Because no resin delivery paths, e.g., runners and gates, are needed for microcavities on the multicavity embossing mold, this micropart fabrication process could replace micro injection molding in many applications. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers     

Hot Pressing of Aluminum Oxide

The hot-pressing characteristics of two aluminum oxides were studied in order to acquire a better understanding of the densification process and to develop a method of predicting the effects of experimental conditions other than those actually tested. A rapid hot-pressing technique was developed which greatly reduced the time element. The rate equation proposed by Murray, Livey, and Williams for hot-pressing ceramics was found to hold for the two aluminas, thus making it possible to predict the effects of changes in hotpressing conditions. The equation used was     . Viscosity, η, was calculated as a function of temperature using this equation and the experimental hot-pressing results. Values varied from 1.2 × 10¹² poises at 1300°C. to 4.6 × 10¹⁰ at 1600°C.     

玻璃熔窑的热修

为使玻璃熔窑各部位的耐火材料使用寿命同步,常对易蚀损部分进行热修,以延长炉龄,创造更多的经济效益。介绍了对熔窑大碹热修的具体施工方法与注意事项。