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   硅铝尖晶石 的翻译结果: 查询用时:0.033秒
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硅铝尖晶石
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  al-si spinel
    But, the formation of the Al-Si spinel was not ascertained.
    但他们却没有肯定硅铝尖晶石的生成。
短句来源
    Later, by the study of the author, it is identified that the temperature of the carbonaceous kaolinite has reached to 1000℃, almost to that needed to form Al-Si spinel near the exothermic peak of kaolinite.
    后来经笔者研究,肯定为炭质高岭石粘土因受煤自燃已煅烧至1000℃左右,即相当于高岭石放热峰附近所产生硅铝尖晶石的阶段。
短句来源
  “硅铝尖晶石”译为未确定词的双语例句
    The transition from dried gel to mullite is: amorphpus→Si-Al spinel→mullite, and the equal radius of the final powder is 0.54μm.
    干凝胶向莫来石的转变过程是:无定形→硅铝尖晶石→莫来石,制得的粉末平均粒径为0.54μm。
短句来源
    DISCOVERY OF Al-Si SPINEL IN NATURE
    硅铝尖晶石在自然界的发现
短句来源
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  al-si spinel
In the series there is no obvious presence of Al-Si spinel.
      
Both these two parameters influence the intensities of both endothermic and exothermic peaks related to the dehydration, dehydroxylation and then crystallizations of Al-Si spinel, mullite and cristobalite phases.
      
The Al-Si spinel has a composition and structure similar to that of the (2∶1) mullite, i.e.
      
Those with pseudoboehmite are found to form mullite via the paths of either Al-Si spinel → mullite transformation or γ-Al2O3 → θ-Al2O3 + amorphous SiO2 → mullite, depending upon the ratios of Al2O3/SiO2.
      
The as-prepared powder contained mullite, a small amount of γ-Al2O3 (Al-Si spinel) and amorphous material; this powder was composed of spherical primary particles of ~ 0.05 μm diameter.
      
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C.W. Brindley et al. (1959) considered the principal crystalline phase in the exothermic reaction of clay mineral kaolinite at about 980℃ as Al-Si spinel(2Al_2O_3·3SiO_2 or 3Al_2O_3·2SiO_2) and pointed out that the Al-Si spinel is similar to that of γ-Al_2O_3, and it is possible to mistake it for r-Al_2O_3 in case of inaccurate measurement. F.C. Loughnan et al.(1981) found that the kaolinite flint clay may transform into mullite and christobalite during the self-burning of coal in New South Wales, Australia,...

C.W. Brindley et al. (1959) considered the principal crystalline phase in the exothermic reaction of clay mineral kaolinite at about 980℃ as Al-Si spinel(2Al_2O_3·3SiO_2 or 3Al_2O_3·2SiO_2) and pointed out that the Al-Si spinel is similar to that of γ-Al_2O_3, and it is possible to mistake it for r-Al_2O_3 in case of inaccurate measurement. F.C. Loughnan et al.(1981) found that the kaolinite flint clay may transform into mullite and christobalite during the self-burning of coal in New South Wales, Australia, while in the low temperature zone metakaolinite occurs. They also considered that the above fact was discovered by themselves. But, the formation of the Al-Si spinel was not ascertained. Ma Jinping, Ba Qinglian, Jing Kigui and the author(1982 ) observed, near a highway in Hequ County, Shanxi Province, that carbonaceous clay has been whitened by scorching during the self-burning of coal within carboniferous coal series. Later, by the study of the author, it is identified that the temperature of the carbonaceous kaolinite has reached to 1000℃, almost to that needed to form Al-Si spinel near the exothermic peak of kaolinite. It is very concordant as compared with the data obtained by G. W.Brindley, and that of the exothermic peak of kaolinite. The appearance of the samples resembles with the kaolinite clay heated up to 1000℃.Theyare white, soft with micropores, slightly rough and staining fingers easily. They are also dark in luster and not viscous. The data from X-ray of a powder photo(Jeney photo, 10 hours)are as follows, 1.9673(?)(strong), 1.3919(?)(verystrong), 1.140(?)(weak)in width. All of the curves of different thermal analysis and those of dehydration are straight lines. The result of chemical analysis is similar to that of the dehydraed kaolinite. The content of impurities is 4.69%, A/S=0.902. Grainular texture and micropores are shown under the scanning electronic microscope. The result of infrared spectrum analysis is the same with that of the reaction of Suzhou's kaolinite heated up to 1000~1100℃(Chen Jingyan 1963), and 1300~960cm~(-1) wide peak shows the curve of the elastic vibration of (Si—O)—Si; 804cm~(-1) shows the vibration of Si—O—Al, and 469cm~(-1) shows the vibration of Si—O.The burned clay is always associated with a small amount of mullite. This resembles the reaction of kaolinite heated up to 1000℃ but is different from halloysite heated up to 1000℃(no mullite). Sometimes a small amount of halloysite (7(?)) is formed by rain action.

粘土矿物高岭石在980℃左右放热反应的主要结晶相被G.W.Brindley(1959)确定为硅铝尖晶石(2Al_2O_3·3SiO_2)。并指出硅铝尖晶石和γ-Al_2O_3的X射线数据很相似,若不作仔细测量易把它误认为是γ-Al_2O_3。F.C.Loughnan等(1981)研究Australia New South Wales高岭石硬质粘土因煤层自燃而受热,转变为莫来石与方石英,其低温带则产生变高岭石,并说这是有文献记载的第一次。但他们却没有肯定硅铝尖晶石的生成。笔者于1982年与马晋屏、巴庆廉、井喜贵等同志在山西省河曲县公路边的上石炭统煤系地层中,发现因煤自燃而使炭质粘土有灼烧变白的现象。后来经笔者研究,肯定为炭质高岭石粘土因受煤自燃已煅烧至1000℃左右,即相当于高岭石放热峰附近所产生硅铝尖晶石的阶段。并与Brindley等的资料及有关高岭石放热峰的数据进行了对比,完全相符。 样品外观与用人工法,使高岭石粘土加热至1000℃左右时的物料一样,白色、松软有微孔隙、无滑感稍粗糙、易染手、光泽暗淡、无粘性。其X射线粉末照相(Jeney相机,10h)数据为:1...

粘土矿物高岭石在980℃左右放热反应的主要结晶相被G.W.Brindley(1959)确定为硅铝尖晶石(2Al_2O_3·3SiO_2)。并指出硅铝尖晶石和γ-Al_2O_3的X射线数据很相似,若不作仔细测量易把它误认为是γ-Al_2O_3。F.C.Loughnan等(1981)研究Australia New South Wales高岭石硬质粘土因煤层自燃而受热,转变为莫来石与方石英,其低温带则产生变高岭石,并说这是有文献记载的第一次。但他们却没有肯定硅铝尖晶石的生成。笔者于1982年与马晋屏、巴庆廉、井喜贵等同志在山西省河曲县公路边的上石炭统煤系地层中,发现因煤自燃而使炭质粘土有灼烧变白的现象。后来经笔者研究,肯定为炭质高岭石粘土因受煤自燃已煅烧至1000℃左右,即相当于高岭石放热峰附近所产生硅铝尖晶石的阶段。并与Brindley等的资料及有关高岭石放热峰的数据进行了对比,完全相符。 样品外观与用人工法,使高岭石粘土加热至1000℃左右时的物料一样,白色、松软有微孔隙、无滑感稍粗糙、易染手、光泽暗淡、无粘性。其X射线粉末照相(Jeney相机,10h)数据为:1.9573(?)宽(强);1.3919(?)宽(很强),1.140(?)宽(弱)。差热分析曲线与脱水曲线均呈直线状。化学分析结果与较纯的高岭石熟料很相似,杂质总含量4.69%,A/S=0.902。扫描电镜下多呈粒状结构及微细孔隙。红外吸?

Effects of calcining temperature on the physical and chemical properties of calcined kaolinite such as brightness,bulk density,oil absorption,active Al 2O 3,scattering coefficients were investigated with the kaolinite containing coal from Shanxi province of China.The results show that the brightness of calcined kaolinite is increased significantly with the temperature in the range of 650-1 150 ℃. Bulk density is slightly increased with temperature in the same range. Content of active Al 2O 3 is notably...

Effects of calcining temperature on the physical and chemical properties of calcined kaolinite such as brightness,bulk density,oil absorption,active Al 2O 3,scattering coefficients were investigated with the kaolinite containing coal from Shanxi province of China.The results show that the brightness of calcined kaolinite is increased significantly with the temperature in the range of 650-1 150 ℃. Bulk density is slightly increased with temperature in the same range. Content of active Al 2O 3 is notably increased with temperature in the range of 650-980 ℃ but decreased after 1 050 ℃. Scattering coefficient is notably increased with temperature in 650-950 ℃ but is not changed at the temperature higher than 950 ℃ and oil absorption is basically not changed in 650-1 150 ℃.XRD shows that the crystal form of calcined kaolinite is changed into meta kaolinite under 950 ℃,silic aluminum_spinel and some of mullite in 950-1050℃ and mullite over 1 150 ℃.

煅烧高岭土是一种性能独特的新型无机非金属矿物粉体材料。实验以山西煤系硬质高岭岩为原料 ,研究了煅烧温度对煤系高岭土白度、吸油率、堆积密度、遮盖率 (光散射系数 )及活性 (活性Al2 O3含量 )等物理化学性能的影响。结果表明 :在 65 0~ 115 0℃范围内煤系煅烧高岭土的白度随温度升高而显著提高 ;堆积密度略有增大 ;活性在 65 0~ 980℃范围内显著提高 ,但在 10 5 0℃后下降。遮盖率在 65 0~ 95 0℃之前随温度升高显著增强 ,但在 95 0℃后基本上不再变化。吸油率指标在 65 0~ 115 0℃范围内基本上不变化。 95 0℃以下 ,煅烧高岭土的物相以偏高岭石相为主 ;95 0~ 10 5 0℃ ,煅烧高岭土的物相已转变为硅铝尖晶石和部分莫来石。当煅烧温度达到 115 0℃时 ,煅烧高岭土已转变为莫来石相

The superfine mullite powder with high purity and narrowly distributed particle size was prepared by the Sol-Gel process,using TEOS and aluminum nitrate as main starting materials.The Sol-Gel process conditions and the superfine mullite powder were studied by DSC,TG,IR,XRD and laser granularity analysis technique.The research showed that during the thermal treatment of dried gel, the amorphous dried gel changed into Si-Al spinel firstly and then mullite phase; the pure and superfine mullite powder could be obtained...

The superfine mullite powder with high purity and narrowly distributed particle size was prepared by the Sol-Gel process,using TEOS and aluminum nitrate as main starting materials.The Sol-Gel process conditions and the superfine mullite powder were studied by DSC,TG,IR,XRD and laser granularity analysis technique.The research showed that during the thermal treatment of dried gel, the amorphous dried gel changed into Si-Al spinel firstly and then mullite phase; the pure and superfine mullite powder could be obtained after the thermal treatment at 1300 ℃.The particle size range was between 0.4 μm and 1.0 μm, and the average particle size was only 0.54 μm.The results indicated that the Sol-Gel process could be used to prepare the superfine mullite powder with high purity and narrowly distributed particle size.

以硝酸铝和正硅酸乙酯为主要原料 ,利用Sol-Gel方法制备了粒径分布范围窄的高纯莫来石超细粉末。运用DSC、TG、IR、XRD和激光粒度分析等技术对Sol-Gel工艺条件 ,以及莫来石超细粉末进行了分析研究。研究表明 ,在干凝胶的热处理过程中 ,非晶态的干凝胶首先转化为硅铝尖晶石 ,再由硅铝尖晶石转化为莫来石相 ;在 1 30 0℃下热处理可获得纯莫来石相的超细粉末 ,其粒径分布在 0 .4~ 1 .0 μm之间 ,平均粒径为 0 .5 4μm。结果表明 ,采用Sol -Gel方法可以制备出高纯、粒径分布范围窄的超细莫来石粉末。

 
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