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1)  ρ-Al_2O_3
ρ-Al2O3
1.
Studies were focused on the effect of binders,such as calcium aluminate cement,silica fume and ρ-Al_2O_3 micropowder,on properties of the corundum-magnesia castable,which is composed of fused corundum and fused magnesite as starting materials.
以致密电熔刚玉、电熔镁砂为主要原料,选用铝酸钙水泥、硅微粉和ρ-Al2O3微粉为主要结合剂,采用电熔刚玉为骨料,固定骨料:基质=70:30(质量比),基质组成中固定电熔镁砂细粉、α-氧化铝微粉加入量均为6%不变,改变致密电熔刚玉细粉、铝酸钙水泥、硅微粉和ρ-Al2O3微粉的加入量,配制成3种结合系统的刚玉-MgO浇注料。
2.
Application of ρ-Al_2O_3 Micropowder in High Purity Aluminium and Magnesium Pouring Matericals;
 介绍了结合剂ρ-Al2O3微粉的特性,对其结合高纯铝镁浇注料的流动性、强度和抗渣性进行了研究。
2)  ρ-alumina binded
ρ-Al2O3结合
3)  Al_2O_3
Al2O3
1.
The Fe-matrix composites reinforced with Al_2O_3were fabricated by melting-casting.
采用熔铸法成功的制备成了Al2O3/Fe复合材料,利用扫描电子显微镜(SEM),来观察增强相Al2O3的微观组织。
2.
The phase transformation of γ-Al_2O_3 at high temperature was characterized by Raman techniques.
通过不同波长的Raman激发光对γ-Al2O3的高温相变过程进行了研究。
3.
Steric hindrance layer can be established when the surfaces of nano-Al_2O_3 were grafted with polyacetal,which(increased) the dispersibility of the nano-particles as well as the compatibility between the particles and the resin matrix.
在纳米Al2O3表面接枝聚缩醛可在粒子表面建立起空间位阻稳定层,不但提高了纳米粒子的分散稳定性,还可以增强纳米粒子与树脂基体的相容性。
4)  aluminum oxide
Al2O3
1.
A method was developed for synthesis of DBP catalyzed with non-proton acid and the result showed that aluminum oxide can be used to synthesize dibutyl phthalate characterized with high reaction activity,good selectivity and high rate of conversion,but less environmental pollution.
实验结果表明,Al2O3催化酯化合成邻苯二甲酸二丁酯具有反应时间短、反应活性和选择性好、产率高、无环境污染等优点、是理想的合成DBP的催化剂。
2.
On the basis of wear resistance research on polyurethane matrix composites reinforced with aluminum oxide particles, component of slurry pump coated by the composites with optimum proportion was manufactured.
在Al2O3颗粒增强聚氨酯基复合材料耐磨性的研究基础上,采用具有最佳耐磨性的复合材料配方,进行了砂浆泵护板涂覆及产品实用性研究。
3.
In this paper, the preparation of TiO_2 photocatalyst coated on the aluminum oxide surface by sol-gel technique using tetrabutyl titanate as material was studied.
以钛酸四丁酯为原料,Al2O3为载体,用溶胶-凝胶法制备负载型TiO2,在UV-TiO2体系中对吡啶(PD)进行光催化降解,并研究了将TiO2负载在不同铝源所制备的Al2O3后光催化剂的差异,结果表明:负载型TiO2光催化剂加入量为10mg/40mL,吡啶的光催化降解反应符合一级动力学方程;吡啶中氮转化成氨氮。
5)  Alumina [英][ə'lu:mɪnə]  [美][ə'lumɪnə]
Al2O3
1.
The mechanism of the reactions between alumina and modifier strontium in A356 alloy melt have been investigated, by means of XRD and SEM.
通过XRD、SEM等分析手段研究了A356合金熔体中Al2O3夹杂与变质剂Sr之间所发生的反应及其反应机制,结果发现Sr可以与Al2O3经过一系列反应生成Sr-Al-O化合物,由此造成了Sr的损耗,生成的Sr-Al-O化合物可溶于水。
2.
To overcome the high-temperature defects of Ag used as the substrate of superconducting tape and improve the mechanical properties and melting point of Ag,the alumina whose melting point is high was selected as a doping to prepare Al2O3/Ag composite through conventional powder metallurgy.
为了克服Ag作为超导基底时的高温使用缺陷,提高Ag的熔点及其力学性能,选择了高熔点的Al2O3作为掺杂物,通过传统粉末冶金方法制备了Al2O3/Ag基复合材料。
3.
In the present work,the thermal conductivity of alumina was improved by adding aluminum nitride with high thermal conductivity.
本文选用导热系数较高的AlN来改善Al2O3陶瓷的导热性能;并借助SEM和XRD对材料的微观结构和物相进行了分析。
6)  Al 2O 3
Al2O3
1.
A kind of CeO 2 modified Pd/Al 2O 3 supported catalyst was prepared by impregnation method.
浸渍法制备了Al2O3+CeO2为载体的Pd催化剂,对制备中各因素对催化剂效果的影响作了初步研究。
补充资料:Hammett ρ value
分子式:
CAS号:

性质:为哈米特方程中的常数,哈米特方程是表达反应速率与反应物结构定量关系的一个方程式。在芳香族化合物中,若不含取代基的反应物的反应速率常数为K0,当引入取代基后,其反应速率常数为K,则有:lgK=lgK0+σρ;σ为取代常数,其值决定于取代基的性质和位置(如邻位、间位、对位),ρ决定于反应类型,ρ值可为<0,0,0<ρ<1,≥1等各种可能数值。近年来,人们认为p的数值与反应过渡态的荷电情况有关,当过渡态与反应物相比具有正电性时,则ρ<0;具有负电性时则ρ>0;电性无变化时,则ρ=0。如果与ρ=1的标准反应相比,则ρ<1表明该反应在过渡态时的电荷改变比标准反应具有更强的正电性,ρ值越小,则正电性越强;ρ>1时,则过渡态时的电荷改变比标准反应具有更强的负电性,ρ值越大,则负电性越强。根据ρ值可判断反应过渡态的可能情况。测定反应的ρ值,已成为研究有机反应机理的有效手段之一。

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