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粘土热
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  “粘土热”译为未确定词的双语例句
     Mossbauer firing study of Lishan clay
     骊山粘土热变化的穆斯堡尔谱研究
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     Study on the Thermal Properties of Clay in Different Areas
     不同产地粘土热性能研究
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     Experimental study on thermo-chemical-mechanical effect of undisturbed soil and remolded soil
     两种状态的粘土热-化学-力学效应试验研究
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     ON MODELING OF THERMO-MECHANICAL VOLUME CHANGE BEHAVIOR OF SATURATED CLAYS
     饱和粘土热–力学体积变形特征模拟研究(英文)
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     TG and DTA measurements indicated that the PILC had a good increase in thethermal stability.
     TG、DTA分析结果表明,交联后,粘土热稳定性得到提高,500℃出现超强酸性的有机硫酸酯结构。
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     THERMAL MODELLING RESEARCH OF CLAY MINERALS
     粘土矿物的模拟研究
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     Thermal Stability of Alkali-active Burned Clay Cement
     碱烧粘土水泥的稳定性
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     HOT
     报!
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     CHAPTER 5 MARINE SEDIMENTATION Section 6 Clay Mineral
     粘土矿物
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     Hottest Word
    
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he hydroxyl-SiAl and hydroxyl-Al cross-linked montmorillonite(CLM) were prepared. The results of 27Al NMR and XRD show thatpillars of SiAl-CLM are the [Al13]7+ cores combined with the outsidesilica. The higher thermal stability of SiAl-CLM is due to the enhancedcapability for holding protons by StAl pillars and reduced number ofprotons migrated to the octahedral layer during pillars dehydroxylation,it brings about the enhancement of interaction between the pillars andthe montmorillonite layer. The SiO. in tetrahedral...

he hydroxyl-SiAl and hydroxyl-Al cross-linked montmorillonite(CLM) were prepared. The results of 27Al NMR and XRD show thatpillars of SiAl-CLM are the [Al13]7+ cores combined with the outsidesilica. The higher thermal stability of SiAl-CLM is due to the enhancedcapability for holding protons by StAl pillars and reduced number ofprotons migrated to the octahedral layer during pillars dehydroxylation,it brings about the enhancement of interaction between the pillars andthe montmorillonite layer. The SiO. in tetrahedral sheets of montmorillonite is inverted by high temperature calcination and the formation of St-O-Si bond between the outside silica of StAl pillars and the invertedtetrahedral sheets also improves the thermal stability of SiAl-CLM.

羟基硅铝交联粘土的合成和热稳定性研究孙来生,李栋藩,陶龙骧(中国科学院大连化学物理研究所,大连116023)关键词蒙脱土,硅铝柱,热稳定性,~(27)Al NMR交联粘土作为一种新型催化材料出现以来,其热稳定性一直是重要研究课题,对影响交联粘土热稳定?..

The hydroxyl Zr pillared clays (Zr PILC) were prepared. The studies of the preparation conditions show that, when directly using ZrOCl 2·8H 2O solution as pillaring agent, the long time of ageing, the high concentration of pillaring agent and the short pillaring reaction time are advantageous to the preparation of Zr PILC with large BET area and good sheet structure, even calcined at high temperature. The results of pyridine adsorbed IR spectra show that Zr PILC has more total acid sites and more Brnsted...

The hydroxyl Zr pillared clays (Zr PILC) were prepared. The studies of the preparation conditions show that, when directly using ZrOCl 2·8H 2O solution as pillaring agent, the long time of ageing, the high concentration of pillaring agent and the short pillaring reaction time are advantageous to the preparation of Zr PILC with large BET area and good sheet structure, even calcined at high temperature. The results of pyridine adsorbed IR spectra show that Zr PILC has more total acid sites and more Brnsted acid sites than ZrAl PILC and Al PILC, but most of its acid sites are weak acid sites. The proportion of Brnsted acid sites to the total acid sites measured by pyridine adsorbed among 200 ̄300℃ is 46 2% for Zr PILC, 28 6% for ZrAl PILC and 14 3% for Al PILC. The thermal stability of pillared clays is studied by thermal analysis (DTA and TG). Zr PILC has higher thermal stability than ZrAl PILC and Al PILC. The reason is that Zr pillars hold more protons than ZrAl and Al pillars to reduce the number of protons migrating to the octahedral layer during pillar dehydroxylation. It brings about the enhancement of interaction between pillars and the montmorillonite layer.

制备了锆交联粘土和锆铝交联粘土.锆交联粘土制备条件的研究表明,直接用ZrOCl2·8H2O水溶液作交联剂,延长老化时间和增大交联剂浓度有利于制备大比表面积及高温有序的锆交联粘土.200℃及300℃吡啶吸附的IR谱表明锆交联粘土表现为弱酸性,总酸量较多,B酸所占比重大.吡啶吸附的酸强度在200~300℃之间的B酸占该区间酸量的46%.差热分析表明锆交联粘土的热稳定性高于锆铝交联粘土及铝交联粘土,其原因可归于锆交联柱固定了较多的质子,减少了迁往粘土八面体层的质子数,从而增加了交联粘土的热稳定性.

The anionic clays pillared by heteropolyoxometalate, ZnAl- XW12-nMn, were synthesized by means of hydrothermal ion -exchange reactions,and characterized by XRD,IR,UV -Vis,ESR and DTA spectra. The interaction betweenthe layers and pillars, and the influence of this interaction on heat stability and acid catalytic activity of pillared clay were investigated.

采用水热合成与离子交换方法,合成了10种Keggin结构杂多阴离子柱撑粘土ZnAl—XW_(12-n)M_n,通过XRD、IR、UV—Vis、ESR和DTA等手段系统研究了它们的结构,讨论了杂多阴离子在层间与层板的相互作用以及这种作用对柱撑粘土的热稳定性、酸催化活性等性质的影响。

 
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