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- Polyimide foams were prepared from poly(ester-amine salt) precursor powder through a foaming process,using aromatic dianhydride and diamine as monomers. 以芳香二酐和二胺为单体,采用聚酯铵盐前体粉末发泡的方法制备聚酰亚胺泡沫材料。
- The ultrofine glass precursor powder had been gained quickly at lower temperature by the sol-gel-self propagating method, which was benefit to shaping and sintering of bioglass materials. 首次将溶胶凝胶法与自蔓延法相结合,在较低温度快速制备出超细玻璃前驱粉,有利于生物玻璃材料的成形和烧结。
- The copper content in the precursor powder greatly influence the phase composition of the calcined powders.The increase of copper content facilitates the formation of composite oxide. 前驱体粉末中铜含量对煅烧后复合粉末的相组成也存在较大影响,铜含量越多,越容易生成复合氧化物。
- The current status and progress in the preparation of mullite precursor powders by chemicalmethods and the mullitization mechanism at low temperatures are reviewed. 对化学法制备莫来石粉料的研究现状进行了系统的总结,阐述了低温莫来石化的机理。
- Taking 2,4,6-triaminopyrinide as triamine monomer,polyimide foams with cross-linked structures were prepared by foaming poly(ester-amine salt) precursor powders. 以2,4,6-三氨基嘧啶为三胺单体,经由聚酯铵盐前体粉末发泡合成了具有交联结构的聚酰亚胺泡沫。
- Bi-based HTS rawpowders were prepared byspray-pyrolysis method.Its chemical homogeneity,accu-racy and precursor powders , short tapes prepared withthis rawpowder were studied. 利用喷雾热粉解法制备铋系超导初级粉末,对初级粉末成分均匀性、准确性及所获得的前驱粉、短样带材进行了研究。
- Most synthetic detergents are in the form of powder or liquid. 大多数合成洗涤剂呈粉状或液态。
- Actually they even have vanilla powder. 实际上还可以加香草粉。
- He takes a powder every morning. 他每天早晨吃一种粉状药。
- The precursor of the modern car was a horseless carriage with a petrol engine. 现代汽车的前身是不用马拉的,装有汽油发动机的车子。
- Borax is a kind of white powder. 硼砂是一种白色粉末。
- Shaking will settle the chalk powder down. 晃一晃把粉笔末抖落下来。
- Keywords nanometer vanadium carbide;reduction/carbonization;ammonium vanadate(NH_4VO_3);precursor powder; 纳米碳化钒;还原/碳化;偏钒酸铵;前驱体粉末;
- Keywords superconducting;spray-pyrolysis;rawpowder;precursor powder;chemical analysis; 超导;喷雾热分解;初级粉末;前驱粉;成分分析;
- Borax must be reduced to powder for infants. 硼砂必须研成细粉才能供婴儿使用。
- He crushed a piece of chalk to powder. 他将一支粉笔压成粉末。
- There's too much powder on your nose. 你鼻子上的粉擦得太多了。
- Excuse me, where is the powder room? 请问女厕所在哪里?
- Agitate the mixture to dissolve the powder. 搅动混合物而使粉末溶化。
- Thefirst telephone was the precursor of modern communications networks. 最早出现的电话是现代通讯网的雏型。