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搜索结果: 1-15 共查到地质学 Al2O3相关记录20条 . 查询时间(0.312 秒)
Al2O3和Ti在风化和热液蚀变等地球化学过程中通常被认为是不活动元素,两者的比值Al2O3/Ti常被用来指示地球化学作用过程。通过对中国157件火成岩样品元素含量平均值的统计发现,火成岩样品中Al2O3/Ti与SiO2含量值之间存在着较好的幂函数关系:ln(Al2O3/Ti)=0.073×SiO2-0.89,式中Al2O3和SiO2和Ti含量单位均为%。本文基于得到的经验方程和TAS图解构建了一...
综述了Al2O3应用于非均相催化臭氧化体系的研究进展,对比了催化体系和单独臭氧体系对水中有机物的去除效果,从催化剂对有机物的吸附、溶液的pH值影响、溶液中存在的无机离子和臭氧的分解机理方面,探讨了影响Al2O3催化臭氧化体系催化效果的主要因素,分析了目前研究中存在的问题,展望了Al2O3催化剂在水处理方面的应用前景。
Densitymeasurementshavebeenperformedon4Mg-aluminosilicatemeltsand4melts O -SiO system(includingstoichiometriescorrespondingtothemin-intheCaO-MgO-Al eralcomositionsa?kermanite,diopside,enstatite,andc...
We have measured multicomponent chemical diffusion coefficients in a melt near to the low pressure water-saturated eutectic granite composition in the system K2O-Na2O-Al2O3-SiO2-H2O at 1.0 GPa and te...
The results of multi-anvil melting experiments are reported for a range of compositions in the system CaO-MgO-Al2O3-SiO2. The liquidus crystallization fields for forsterite, or-thopyroxene, clinopyrox...
The stability field of MgMgAl-pumpellyite, Mg5Al5SiO21(OH)7, was determined in the system MgO-Al2O3-SiO2-H2O in reversal experiments at pressures between 34 and 100 kbar and temperatures in the range ...
Reversedphase-equilibriumdata,collectedoverthe P-T range12¤C20kbarat850¤C11C,de?nethesolubilityofAl O inferrosilite(Fs)inequilibriumwithalmandinegarnet (Alm).Thenewdataindicatesigni?cantlylowerAlO so...
Approximately 20 wt.% of the bauxite from Andoom in northern Queensland, Australia is composed of material that cannot be accounted for by identifiable well-crystallized phases. This poorly- diffracti...
天然勃姆石热相变体γ—Al2O3阴离子交换—吸附模式的研究。
The compositions ofchlorite in divariant assemblages involving orthopyroxene + for-sterite and spinel + corundum werereversed at a range oftemperatures for P= 14kbar and a range of pressures for T = 8...
A saponite pillared with a single (Al2O3) or a mixed (SiO2-TiO2) oxide exhibited basal spacings of 16–19 and 30–40Å, respectively. The pillared structures were found to be stable up to 700°C. Wa...
天然勃姆石热相变体(γ—Al2O3)的阴离子交换。
Solutions containing AlCl3 and Si(OH)4 (concentrations ≤ 1.5 mM with molar Si:Al ratios of 1:2, 1:1 and 3:1) and FeCl2 (0, 0.5 and 1.0 mM) were adjusted to pH 8 with Ca(OH)2, and incubated at 23°C and...
Gibbs free energies for phases in the system Al2O3-SiO2-H2O have been calculated from reversed experiments in order to correct earlier values and to calculate a phase diagram consistent with more rece...
Zeolites having the structures of phillipsite, merlinoite, and gobbinsite were synthesized from clear solutions at 80°C in the system Na2O-K2O-Al2O3-SiO2-H2O and their morphologies, cell parameters, a...

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