烧结

ABSTRACT A control scheme for sinter ignitor is proposed which is consisted of main controller for ignition strength and supplementary controller for ignition temperature.

为控制烧结点火，综合考虑点火强度、温度对点火质量的影响，提出一种强度主控、温度辅控方案。

The good catalytic performances were obtained on those catalysts supported by SiO_2. With the increasing calcination temperature from 300℃to 700℃, Co_3O_4 particles augmented and sintered on the samples surface which contained 10 wt.% cobalt, the crystallite size of Co_3O_4 was aggrandized from 7.2 nm to 20.3 nm by inchmeal. On the other hand, the activation energy for the combustion reaction was increased linearly with the augment of average crystallite size of Co_3O_4, the TOF value on prepared catalyst was decreased with it. Thus, the catalytic combustion was a typical structure-sensitive reaction.

在钴含量为10 wt%的样品上，随着焙烧温度由300℃提高到700℃，钴物种出现迁移团聚甚至烧结，在XRD中测定的Co_3O_4晶粒尺寸由7.2 nm逐步增加至20.3 nm；另一方面，催化剂的燃烧活化能随样品上Co_3O_4晶粒的平均尺寸增加而呈现线形增加趋势，而单位时间内单位活性物种上的甲烷转换频数随着粒径增加而逐渐降低，这一现象证实了该反应属于典型的结构敏感反应。

In order to study the z-direction dimensional accuracy of laser sintering wax models for investment casting, both the shrinkage rate and the incrassation of bottom which affected the accuracy were separated by building calculation model.

中文摘要：为了研究激光烧结熔模铸造蜡模的z向尺寸精度，建立计算模型使影响精度的收缩率和底部增厚分离。

The performace of material was tested by DSC,XRD,SEM,EIS and charge-discharge cycles . The influences of various synthesized condition , sintering time and the amount of F were studied and correlative technics parameter to improve performance of material were optimized. DSC shows that three endotherimc peaks and one large exothermic peak are observed in the temperature range 150-400℃, which is because of the removal of water,the decomposition of the organic constituents and the formation of spinel. Only the citrate precursor is sintered at least 450℃, the crystallinity of spinel phase could be formed intactly.

通过DSC、XRD、SEM、EIS和充放电循环等手段对材料进行性能测试，比较了不同合成温度、烧结时间和不同掺杂元素量等条件对材料性能的影响，优选出提高材料性能的相关工艺参数， DSC表明，采用溶胶-凝胶-络合法制备的前驱体在150-400℃中有三个小的吸热峰和一个大的放热峰，这是前驱体中的水分、柠酸酸及其盐和醋酸及其盐在蒸发及分解，柠檬酸前驱体至少需在450℃以上才可能形成完整的尖晶石材料。

Under the sametemperature, with the increase of the quantity of the additions, the density hasincreased, and the variation of the mechanical properties of these materialsdepended on the density and the quantities of the second-phase particle and intercrystalline phase of these materials.

随着烧结添加剂量的增加，在相同温度下材料的致密度上升，力学性能的变化与材料中的致密度、第二相粒子及晶间相有关。

The experiments showed that it achieved the same results as the hot isostatic compaction.

本文研究了在普通压机上进行的粉末准热等静压反应烧结工艺。

The techniques of vacuum sintering and hot isostatic press of the Ti -based cermets has also been studied systematically.

对Ti基金属陶瓷的真空烧结和热等静压工艺进行了系统的研究。

There are some processes such as hot isostatic pressing which combine the compaction and sintering processes into a single step.

还有一些工艺如热均衡挤压，将压实和烧结工艺合并为单一步骤。

The dehydration and transformation into suanite of decomposed of szaibelyite at about 700℃ is the main reason of ludwigite weight loss, It was found by XRD that paigeite and magnoferrite are the most stable component without phase tromsformation during oxidizing roasting.

硼镁石在700℃左右分解脱掉结构水形成遂安石，硼镁石的分解是造成硼铁矿大量失重的主要原因。通过XRD分析可知矿石中的镁铁矿相、硼铁矿相为最稳定相，在硼铁矿原矿焙烧过程中不发生相变。为硼铁矿烧结-冶炼工艺提供了必要的理论依据。

Objective:To evaluate the cytotoxicity of twice sintered machinable nano-meter zirconia ceramic for dental use.

目的：对二步烧结牙科可切削牙科纳米氧化锆陶瓷细胞毒性进行初步评价。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。