氧化铝

Silica and alumina, to an organic silicone rubber, ShoreA 70, to improve the hardness of silicone rubber material and the results indicated that the addition of silica improved the hardness of the material dramatically, but depressed the heat-resistance markedly; the addition of alumina improved the hardness of the material also, but more loading was needed to achieved the hardness as compared with the silica added materials.

研究发现，添加气相法白碳黑能显著提高硅橡胶的硬度，但使硅橡胶的耐热老化性能明显变差；氧化铝也可以用于提高硅橡胶的硬度，但与气相法白碳黑相比，达到相同硬度时的添加量要大的多；比较而言，通过添加氧化铝获得的高硬度硅橡胶具有较好的综合性能，更能满足电化铝烫印版的制作需要。

The results from the experiment are: the amount of all micro-powders that grain sizes are less 0.044 mm should be less than 35% in weight, and the value of coarse q and attenuate q should be respectively 0.23 and 0.32, and the additive amount of active a-alumina and calcium alumina cement should be respectively 7% and 4% in weight, meanwhile, the best dispersant is PMAA-NH4 in the non-microsilica system; while the value of two q should be respectively 0.21 and 0.29, the amount of active a-alumina, microsilica and calcium alumina cement should be respectively 6%, 2% and 4% in weight, the best dispersants are sodium hexamer taphosphate and Na2P3Oio in the microsilica system.

依照上述实验方法得出刚玉自流浇注料所必备的条件：刚玉自流浇注料中的细粉(-0.044mm)总量应小于35％；在无硅微粉系统中的Andreassen公式的粗端q值和细端q值分别为0.23和0.32，氧化铝微粉、水泥的最佳加入量是7％、4％，且所使用的分散剂为改性聚丙烯酸钠最好，而在含硅微粉系统中的Andreassen公式的粗端q值和细端q值分别为0.21和0.29，氧化铝微粉、硅微粉和水泥的最佳加入量为6％、2％和4％，最好合用三聚磷酸钠和六偏磷酸钠作为分散剂。

For satisfy carbonating decomposition of Sodium aluminate solutions, desilication procedure is setted up in sintering alumina.Productiont is a vital link in wholly alumina process .

烧结法氧化铝生产为满足碳酸化分解要求而设立的脱硅工序，是整个氧化铝生产工艺流程中至关重要的环节。

Methyl methacrylate were passed through an alumina column, dried over molecular sieves, deaerated by bubbling argon and stored under argon.

这个氧化铝柱为我没用过，是什么样的呢？在一个玻璃柱里填充氧化铝可以吗？

The Flex-Hone tool is available in a variety of abrasive types including Silicon Carbide, Aluminum Oxide, Boron Carbide,Tungsten Carbide, Levigated Alumina and Zirconia Alumina.

球头刷的研磨粉可提供各种材料，包括：碳化硅、氧化铝、碳化硼、碳化钨、氧化铝、氧化锆。

Four tons of bauxite make two tons of alumina which in turn is smelted to produce one ton of aluminum.

4吨铝土矿可生产2吨氧化铝，而2吨氧化铝可冶炼成1吨铝。

Bauxite is aluminium ore which is smelted into alumina and then refined into aluminium.

铝土矿是一种铝矿石，经冶炼可加工成氧化铝，而氧化铝在经精练加工成铝。

In order to study the aldol condensation of 2,15-hexadecanedione on the surface of aluminium, the intermolecular condensationmechanism of acetone occurring on aluminum was simulated by usingsemi-empirical AM1 method embodied in MOPAC 6.0 program package.

为了研究2，15-十六烷二酮在氧化铝表面的环合机理，选择小分子丙酮为模型化合物，用量子化学半经验AM1方法研究双分子丙酮在氧化铝表面的醛醇缩合机理。

Almatis recently announced global price increases for tabular alumina, calcined alumina, calcium aluminate cement and spinel products.

最近，Almatis宣布公司全球范围内的片状氧化铝、煅烧氧化铝、铝酸钙水泥、尖晶石产品提价。

Mainly used for precision casting industry ceramsite sand (the Chinese name of it did the "Pearl of Sand""High Aluminum Sand," oil fracturing support, etc.) and used for refractories, abrasives industry white corundum, brown corundum, fused spinel, fused mullite, zirconium mullite, alumina hollow spheres, alumina powder, refractory cement and other products.

主要有用于精密铸造行业的陶粒砂（中文名称又做&宝珠砂&&高铝砂&石油压裂支撑剂等）和用于耐火材料、磨料磨具行业的白刚玉、棕刚玉、电熔尖晶石、电熔莫来石、锆莫来石、氧化铝空心球、氧化铝微粉、耐火水泥等产品。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。