烧结

The present paper summarises different atmospheres used for sintering of PM steels. Using some examples, the effect and influence of different sintering atmo...

本文综述了PM钢烧结过程中所用的不同的烧结气氛，阐述不同气氛的作用及其影响，着重分析不同气氛中碳势及氧浓度的控制，并举例说明

The results of boron, borax and boronic iron concentrate as additives in the production of sintering pellets are compared and analyzed.

比较分析了硼、硼泥、含硼铁精矿作为添加剂在烧结球团生产中的应用，得出了含硼铁精矿作为烧结球团的含硼添加剂在经济上、工艺上都是可行的，且性能优于硼泥的结论。

When boronic acid or boron powder was introduced into silica sol, a β-SiC/B composite powder was obtained by the same method.

在原料中引入硼酸或硼粉后，还获得了不需要任何外加烧结助剂就能致密烧结的β-SiC/B复合粉末，达到了先进水平。

Preparation of the cathode includes:shaping under the press of 40Mpa, sintering at 550℃for 1 hour and at 900℃for 8 hours and threading with molybdenum bar; Considering the literatures we choose CaCl2 as salt for preparation titanium. Pretreatment of salt is for 1 hour at 100℃and for 2 hours at 300℃. Partial pressure of oxygen which need lower than 5.11×10-7Pa to reduct titanium oxides and hygroscopic property of salt need a sealed equipment to electrolyse. And finally successfully designed a satisfied one and the results show that the equipment can be satisfied the requirment of the experiment. Flow of the inert gas is 1.5L/min, the voltage is 2.8 V, temperature is 850℃and time is 2 hours during pre-electrolysis. Flow of the inert gas is 0.2L/min, the voltage is 3.1 V, temperature is 900℃and time changes with the mass of TiO2 during electrolysis, namely the greater need the longer time; To eliminate influence of salt and other impurities, the products need to wash with distilled water and dilute chlorhydric acid , then wash with dilute hydrochloric acid under supersonic wave assistant. Finally, electrometical properties of the electrolysis of TiO2 is researched by cyclic voltammetry and chronoamperometry, and results show that there are two main reodox steps, namely from TiO2 to TiO and from TiO to Ti.

阴极制备主要包括40MPa压力下模压成型、两段式烧结(1小时内升至550℃保温1小时，再1小时升温至900℃保温8小时)及烧结后TiO2块打孔用钼棒串接三个主要环节；实验中选用CaCl2作为电解熔盐，并对其进行预处理(100℃，保温1小时； 300℃，保温2小时)；经热力学计算，还原钛氧化物的氧分压至少要低于5.11×10-7Pa，结合电解过程中所用熔盐CaCl2有极强的吸水性的特点，电解装置应有较高的密封性，自行设计了一套密封性可靠的电解装置，便于实验过程中熔盐预处理和氧分压的控制；通过干燥处理预电解过程中Ar流量大约为1.5L/min、电压为2.8 V、温度为850℃、时间为2小时，电解过程中Ar流量大约为0.2L/min、电压为3.1V、温度为900℃，实验结果表明电解时间与TiO2质量密切相关，质量越大需要电解的时间越长；通过自来水冲洗—稀盐酸浸泡、洗涤—在超声波辅助作用下稀盐酸洗涤，可减少熔盐及其它杂质对电解产物检测结果的影响；最后，通过循环伏安法、计时电流法对电解机理的研究，确定电解还原TiO2制备金属钛主要经历了TiO2-TiO-Ti的过程。

For more upgrade aluminium oxide yield, optimize indices, energy conservation and save cost, it is necessity to desilicify steps reconstruction.In order to overcome the shortcoming of the desilication used in Shangdong Alumina Corpotation,three technology such as indirect heating, continious desilication,deep desilication by separation of the sodium-silicon residue.

本文通过对理论界关于烧结法生产氧化铝脱硅原理的研究，结合国内主要氧化铝生产厂家脱硅实践方面的经验，针对山东铝业公司烧结法氧化铝生产脱硅工序的现状，运用间接加热连续脱硅、钠硅渣分离深度脱硅和HCAC法高效脱硅三项科研成果，对原有的三次脱硅工艺改为二次脱硅工艺。

Dilatometric measurements show that there is slight shrinkage in the coating till 1250℃, however, a remarkable sintering process happens cluring holding period at 1250℃.

热膨胀性能测量表明，LC涂层从室温升到1250℃时发生轻微的烧结，在1250℃保温过程发生明显的烧结现象。

XRD and SEM were used to analyze the phrases and microcosmic structure of the hercynite in different temperatures in N2 atmosphere, and the effects of sintering temperature and Fe content on the sintering performance were also studied.

通过XRD和SEM分析在N2气氛中不同热处理温度制备铁铝尖晶石材料的相组成及其显微结构，研究了烧结温度和铁加入量对试样烧结性能的影响。

The quality is a burnt magnesia spinel brick made from fused magnesia, low iron sintered magnesia and fused hercynite.This synthetic hercynite is a patent by RHI Refractories.

它由电熔镁砂、低铁烧结镁砂和电熔铁铝尖晶石制成的烧结镁铁尖晶石砖，这种人工合成的铁铝尖晶石是RHI奥镁公司的专利。

XRD and SEM analysises show that the V, Ti and Ni elements interdiffuse between the granules and Ni powders took places, resulting in forming a diffusing interlayer, its thickness increased with raising of the sintering temperature.

经XRD及SEM分析表明，烧结后，V2.46TiFe0.54合金颗粒与Ni粉之间发生了V、Ti、Ni的扩散，形成了扩散中间层，该中间层的厚度随烧结温度的升高而增厚。

The microstructure and mechanical properties of the alloy under the conditions of vacuum sintering and hot isostatic pressing sintering were investigated.

研究了合金在真空烧结和热等静压烧结条件下的显微组织和力学性能。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。