查询词典 roast sintering

Compositions containing additions of SiO2 and Y2O3 did not show any densification after pressureless sintering, due to the high viscosity and extensive volatilisation of the liquids formed at the sintering temperature.

成分含增补的二氧化硅和氧化钇没有出示任何致密化后，无压烧结，由于高粘度和广泛挥发的液体形成于烧结温度。

In present work, Al〓O〓/Ti Ceramics with several weight percent Ti were made by pre-sintering and pressureless sintering at flow of Ar with Al〓O〓/Ti covered powder.

但是，金属氧化物的使用可能会降低材料的机械性能，以过快的升温速度烧结又有可能导致产品不均匀受热。

The heat air sintering can increase the strength and reductibility of sinter provided that the decrease in total heat consumption on sintering is less than 10 percent.

在总热量消耗降低不超过10%的条件下，热空气烧结可以改善烧结矿的强度和还原性能。

The mian works are as follows:(1)By coprecipitation technique and coprecipitation- gel technique the nano zirconia powder was produced, factors affecting the properties of nano zirconia powder such as pH and the content of stabilizator are analyzed;(2)By the new pressless sintering process, the nano zirconia ceramic was produced, factors which can affecting the properties of nano zirconia sinter body such as moulding press and the sinter temperature are analyzed;(3)By the microtherm pressless sintering process, the nano copper added functional zirconia ceramic composite was produced, microscopic dimensionality and electric properties of such sinter body and the factors affecting such sinter body are analyzed;(4)By the self-invented "external albumen coating" technique the zirconia powder was successfully coated by carbon in the corresponding sinter body, which can help solve the traditional aggregation problem to some degree;(5)Based on analyze the characteristics in the nano powder sinter process, the "three-ball sinter model" was proposed, for the relationship between the relative density and porosity of sinter body, by mathematical fitting, such model was successfully verified.

本研究比较系统地研究了纳米氧化锆陶瓷的合成与成型机理，特别是讨论了纳米氧化锆陶瓷的稳定性，为防止纳米颗粒在外场作用下的团聚和长大提供了理论基础和实验数据，具体工作有以下几方面：(1)采用共沉淀法和共沉淀-凝胶法制备了纳米氧化锆粉体，并分析了pH值和稳定剂含量对粉体性能的影响；(2)采用新型无压烧结工艺制备了纳米氧化锆陶瓷，并分析了成型压力和烧结温度对烧结体性能的影响；(3)采用低温无压烧结工艺制备出添加纳米铜的功能性纳米氧化锆复合陶瓷，并分析了烧结体的微观尺度和电学性能的变化以及影响因素；(4)通过自创的&鸡蛋清外敷法&在真空镀膜台上对纳米氧化锆粉体进行包敷碳颗粒的表面处理，并采用真空烧结工艺制得相应烧结体，初步开始解决陶瓷烧结过程中团聚长大这一传统难题；(5)通过分析纳米颗粒在制备烧结体过程中的实际特点，提出了&三球烧结数学模型&，通过引入坯体相对密度和孔隙率的相对关系分析并通过自行编写的数学拟合软件，验证了这一数学模型。

In order to acquire the heating-cooling process of laser molten pool and the mutual effect of sintering layers in multi-layer powder sintering, factors such as heat conduction, heat radiation, heat convecting and changeable thermophysical property parameters were taken into account comprehensively, the 3D transient state FEM of the temperature field of multi-layer thin-wall metal parts formed by DMLS was established based on ANSYS. The APDL (ANSYS Parametric Design Language) was used to carry out thermal resource moving and the technique of birth/death for element was used to simulate the process of material addition.

为掌握多层粉末烧结过程中激光熔池的加热冷却规律以及各烧结层之间的相互影响，综合考虑热传导、热辐射和热对流以及材料的高度非线性，基于ANSYS平台建立了多层金属薄壁件的三维温度场有限元模型，利用APDIJ语言编程实现模拟中激光热源的移动，采用&单元生死&技术描述粉末材料动态增长过程。

A control scheme of decompounding sintering process control into two branch control models, chemical composition and control of burn-through point was put forward aiming at the problem of control complexity of iron ore sintering process.

摘要针对铁矿石烧结过程控制复杂性问题，提出了一种将其分解为烧结矿化学成分控制和烧结终点控制的方案。

A control scheme of decompounding sintering process control into two branch control models,chemical composition and control of burn-through point was put forward aiming at the problem of control complexity of iron ore sintering process.

针对铁矿石烧结过程控制复杂性问题，提出了一种将其分解为烧结矿化学成分控制和烧结终点控制的方案。

That if the process can produce much liquid phase during the sintering, and which can become into completely-crystal needle-shap or aborization or bar-shap calcium ferrite instead of glass in the cooling process; if the magnetite is interweaved by the caking into the melting corrosion structure, the granular structure or the eutectic structure instead of exiling in the massive isolation; if the mount of the poreis is little, and uniformitly distributing; if the grain is little; if the organizational structure is symmetrical, all of which can improve the quality of the sintering.

另外还归纳出有利于强度提高的工艺参数和操作制度。分析工业试验和水钢现行生产的矿物组成、结构表明，水钢烧结矿以他形晶磁铁矿为主，铁酸钙为主要的粘结相，多形成熔蚀结构、粒状结构和共晶结构，强度较高；而在台车边缘和表层，由于存在较严重边缘效应和点火温度较低，使该区域的烧结矿组织结构疏松，局部呈蜂窝状或薄壁大孔状，铁酸钙较少而硅酸二钙和玻璃质较多，形成骸晶状结构和磁铁矿连晶，强度较低，致使返矿升高。

Top sintering material preheats for a short time、sinter at lower temperature、cools too fast and has low crystallinity, especially, network SFCA offorms difficultly in the top layer, that results in high ratio of pore, so the strength of top sinter is low. when thickness of sintering material is increased, the ratio of top sinter will be decreased, in its entirety, the strength of sinter will rise.

5烧结矿破碎属脆性断裂，一般在单轴压缩应力下受剪切产生，本文基于低氟烧结矿物质组成，导出了基体抗压强度与烧结矿物质组成的关系式，由此得出，基体抗压强度受磁铁矿影响不大，而受铁酸钙影响较为显著。

The results of analysis and test indicate these method, such as decreasing the size of raw material and using advanced ball grinder to improve the uniformity of the distribution of the materials in the slurry, adjusting the spray granulator to improve the characteristics of tablets, adjusting the sintering temperature curve to improve the uniformity of sintering reaction on different part of ZnO nonlinear resistor, and so on, can improve the surge energy absorption capability.

生产中应尽量减小电阻片缺陷范围；适当减小原料颗粒粒径、采用更先进的搅拌球磨设备和高效的分散剂均能提高原料混合的均匀性，调整优化造粒机控制参数提高造粒质量，优化烧结温度提高反应均匀性等措施，能够大大提高电阻片通流容量。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。