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MAS-NMR investigations of the crystallization behaviour of lithium aluminum silicate (LAS) glasses containing P2O5 and TiO2 nucleants

XRD and 29Si NMR showed that lithium metasilicate (Li2SiO3) is the first phase to c form followed by cristobalite (SiO2) and lithium disilicate (Li2Si2O5). 29Si MAS-NMR revealed a change in the network structure already for the glasses nucleated at 550?C.

出版机构:Elsevier Science

刊物名称:Journal of Solid State Chemistry

出版时间:2010

ISSN:0022-4596

数据源:报刊文摘

Boric acid complexes with organic biomolecules: Mono-chelate complexes with salicylic and glucuronic acids

Two mono-chelate borate complexes are reported. Lithium mono-salicylatoborate, Li[B(Sal)(OH)2], is presented as a novel, hybrid metal?organic framework possessing zeolitic structure constructed with corner-sharing tetrahedral LiO4 and square pyramidal LiO5 polyhedra.

出版机构:Elsevier Science

刊物名称:Inorganica Chimica Acta

出版时间:2010

ISSN:0020-1693

数据源:报刊文摘

Effect of TiO2 addition on structure, solubility and crystallisation of phosphate invert glasses for biomedical applications

Phosphate invert glasses in the system P2O5?CaO?MgO?Na2O are completely soluble and exhibit a neutral pH in aqueous media, and they are therefore of interest for use as degradable implant materials. Their structure consists of small phosphate units such as pyrophosphate (P2O7 4 ?

出版机构:Elsevier Science

刊物名称:Journal of Non-Crystalline Solids

出版时间:2010

ISSN:0022-3093

数据源:报刊文摘

Large surface area mesoporous Al2O3 from kaolin: Methodology and characterization

X-ray diffraction, differential scanning calorimetry and thermogravimetry, transmission electron microscopy, N2 adsorption?desorption isotherms, and magic angle spinning nuclear magnetic resonance were used to characterize both the raw materials and final products.

出版机构:Elsevier Science

刊物名称:Applied Clay Science

出版时间:2010

ISSN:0169-1317

数据源:报刊文摘

The early stages of nucleation and crystallisation of an apatite glass-ceramic: Evidence for nano-scale crystallisation

During crystallisation of FAp, fluorine is used in forming the FAp phase, since fluorine is known to reduce the glass transition temperature (T g), the T g of the residual glass increases on FAp crystallisation, which will restrict the growth of the FAp crystals.

出版机构:Elsevier Science

刊物名称:Journal of Non-Crystalline Solids

出版时间:2010

ISSN:0022-3093

数据源:报刊文摘

Magnetic resonance of lipids and proteins in membranes

Magnetic resonance spectroscopy (NMR and electron spin resonance [ESR]) yields uniquely both dynamic and structural information on lipids and proteins in biological and bilayer membranes.

出版机构:Elsevier Science

刊物名称:Current Opinion in Colloids and Interface Science

出版时间:1997

ISSN:1359-0294

数据源:报刊文摘

Structural study of spray dried silica–germanate nanoparticles

Noncrystalline materials belonging to 0.005Gd2O3?0.995[(1? x)SiO2?xGeO2] system, with Si/Ge ratio ranging from 1:1 to 1:4 (x =0.5; 0.667; 0.75; 0.8) were prepared by sol?gel and spray drying method.

出版机构:Elsevier Science

刊物名称:Materials Science and Engineering: B

出版时间:2010

ISSN:0921-5107

数据源:报刊文摘

Synthesis, 13C NMR-MAS, AC conductivity and structural characterization of [C7H12N2]ZnCl4

Synthesis, crystal structure, 13C CP-MAS-NMR analysis and impedance spectroscopy study are reported for a new organic?inorganic hybrid salt, [C7H12N2][ZnCl4], consisting of one 2,4-diammonium toluene cation and one [ZnCl4]2? anion.

出版机构:Elsevier Science

刊物名称:Journal of Alloys and Compounds

出版时间:2010

ISSN:0925-8388

数据源:报刊文摘

1-Butene cracking to propene over P/HZSM-5: Effect of lanthanum

Introducing lanthanum to P/HZSM-5 led to further enhanced apparent hydrothermal stability for 1-butene cracking and prohibition of P leaching in steam at high temperatures.HZSM-5 zeolite was modified using diammonium hydrogen phosphate and then lanthanum nitrate by impregnation.

出版机构:Elsevier Science

刊物名称:Journal of Molecular Catalysis A: Chemical

出版时间:2010

ISSN:1381-1169

数据源:报刊文摘

27Al MAS NMR spectroscopic identification of reaction intermediates in the carbothermal reduction and nitridation of alumina

The reaction intermediates in the carbothermal reduction and nitridation (CRN) reaction of ?-Al2O3 were identified by 27Al magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy.

出版机构:Elsevier Science

刊物名称:Materials Chemistry and Physics

出版时间:2010

ISSN:0254-0584

数据源:报刊文摘