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Frittage des melanges pulverulents ternaires fer — chrome — manganese. Role exerce par l'atmosphere de traitement 铁-铬-锰三元粉末混合物的烧结。处理气氛所起的作用
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90065-7
D. Georgeault, R. Dessieux, G. Cizeron
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引用次数: 0
Domaine vitreux et conductive ionique des verres du systeme AgPO3Ag2Se 你的系统可以追踪装置
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90074-8
G. Baud, J. Besse
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引用次数: 0
Viscosity of dilute solutions of randomly branched poly (butyleneterephthalate) 随机支链聚对苯二甲酸丁二酯稀溶液的粘度
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90068-2
F. Pilati, A. Munari, P. Manaresi
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引用次数: 3
Etude infrarouge des sites d'adsorption des alcools sur alumine 醇在氧化铝上吸附位点的红外研究
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90072-4
M Benaïssa, O Saur, J.-C Lavalley

The adsorption of different alcohols ((CF3)3 COH, (CF3)2 CHOH, CF3 CH2 OH, CH3 OH) has been studied by gravimetry and infrared spectroscopy. Gravimetric results show that the irreversibly and reversibly adsorbed quantities increase with alcohols basicity. Infrared spectra of the irreversible species formed on alumina samples activated at 1120 K provide evidence for alcoholate species. Moreover additional species are present in the case of methanol and 2-propanol: they are coordinated to Lewis acid sites. The reversible species are mainly hydrogen bonded. Poisoning experiments with bases ((CH3)2 O and (CH3)3 CC ≡ N) lead us to conclude that the number of acid sites not involved in the irreversible adsorption of alcohols increases from (CH3)2 CHOH to (CF3)3 COH. Use of CD3 OCD2H shows that these unoccupied sites are strong Lewis acid ones. These results with those obtained from the coadsorption of two alcohols show the heterogeneity of alumina surface sites; basic O2− - weak Lewis acid Al3+ pair sites are involved in the adsorption of the different alcohols. Moreover the surface presents other sites such as O2+ — strong Lewis acid Al3+ pair sites or strong Lewis acid Al3+ sites which are also involved in the adsorption of alcohols with high pka.

用重量法和红外光谱法研究了不同醇类（（CF3）3COH、（CF3，2CHOH、CF3CH2-OH、CH3-OH）的吸附性能。重量分析结果表明，不可逆吸附量和可逆吸附量随醇碱度的增加而增加。在1120K下活化的氧化铝样品上形成的不可逆物种的红外光谱为醇化物物种提供了证据。此外，在甲醇和2-丙醇的情况下还存在额外的物种：它们与路易斯酸位点配位。可逆物种主要是氢键。碱（（CH3）2O和（CH3。CD3-OCD2H的使用表明这些未被占据的位点是强路易斯酸位点。这些结果与从两种醇的共吸附获得的结果显示了氧化铝表面位点的不均匀性；碱性O2-弱路易斯酸Al3+对位参与了不同醇的吸附。此外，表面存在其他位点，如O2+-强路易斯酸Al3+对位点或强路易斯酸Al 3+位点，它们也参与具有高pka的醇的吸附。
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引用次数: 9
Zur tribophysikalischen darstellung der magneto-ferroelektrischen emulsion 用于磁-铁电乳液的摩擦物理表示
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90075-X
S. Yamaguchi

An emulsion that was composed of ferroelectric barium titanate and ferromagnetic FeCrNi alloy particles was prepared by means of tribophysical procedure. The electromagnetic properties of this emulsion have been studied in terms of electron diffraction.

一种由铁电钛酸钡和铁磁性Fe组成的乳液Cr采用摩擦物理方法制备了镍合金颗粒。用电子衍射方法研究了这种乳液的电磁性能。
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引用次数: 2
The influence of concentration of ethylenediamine and acetate ions on the occurrence of underpotential effects in the system Cu(111)/Pb+2 乙二胺和乙酸离子浓度对Cu(111)/Pb+2体系中欠电位效应发生的影响
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90066-9
A. Budniok, J. Baranska
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引用次数: 1
Randomly branched poly (butyleneterephthalate): Correlation between melt-flow index and branching parameters 随机支化聚(丁二对苯二甲酸酯):熔体流动指数与支化参数的相关性
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90069-4
F. Pilati, A. Munari, P. Manaresi
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引用次数: 6
Verres fluores d'elements de transition 3d et d'uranium IV 3D过渡元素和铀IV氟玻璃
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90073-6
J Guery, G Courbion, C Jacoboni, R de Pape

New fluoride glasses with BaF2MtFnUF4 formula (MtFn = TiF3, VF3, FeF3, GaF3, MnF2, FeF2, CuF2, ZnF2) are obtained. The vitreous areas are established for MtFn = FeF3, MnF2, ZnF2. Thermal and physical properties of some compositions are given. The absorption spectra of U4+ ion in these glasses are similar to those reported for crystallized compounds. In the infrared region, the glasses are transparent (T ≅ 60%) till the absorption edge at 10.7 μm for samples of 0.5 mm thickness. A comparison with homologous systems containing ThF4 is made.

新型含BaF2氟化物玻璃MtFn得到UF4式（MtFn＝TiF3、VF3、FeF3、GaF3、MnF2、FeF2、CuF2、ZnF2）。对于MtFn＝FeF3、MnF2、ZnF2建立玻璃体区域。给出了一些组合物的热性能和物理性能。U4+离子在这些玻璃中的吸收光谱与结晶化合物的吸收光谱相似。在红外区域，对于厚度为0.5mm的样品，玻璃是透明的（Tõ60%），直到10.7μm的吸收边缘。与含有ThF4的同源系统进行了比较。
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引用次数: 4
Domaine vitreux et conductive ionique des verres du systeme AgPO3Ag2Se AgPO3Ag2Se系统玻璃的玻璃和离子传导结构域
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90074-8
G. Baud, J.-P. Besse
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引用次数: 0
DSC studies on the phase transformation of hydrazonium sulfate 硫酸肼相变的DSC研究
Materials Chemistry
Pub Date : 1982-09-01 DOI: 10.1016/0390-6035(82)90063-3
K. C. Patil, J. P. Vittal
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引用次数: 1
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