硅酸的

First, the speed of the reaction between mud acid and rock is very fast, the effective distance of acid is short, active acid can not reach deep formation.

首先，高温下常规土酸与地层矿物反应速度极快，酸液有效作用距离短，活性酸不能到达地层深部；其次，HF与铝硅酸盐的化学反应不是简单的一次反应，其副产物氟硅酸和氟铝化物还可与铝硅酸盐发生二次反应和三次反应，形成一系列不溶性的沉淀物，对储层造成严重伤害；第三，高温情况下酸液对井下管柱及工具腐蚀性很强，对缓蚀剂性能要求高。

The influence of phosphorous slag on the setting time of Portland cement and improvement by some additives such as sodium sulphate,calcined gypsum and calcined alunite and synthesized additive were studied.

磷渣是电炉制取黄磷工业的一种工业废渣，在用电炉法制取黄磷时，所得到的以硅酸钙为主要成分的熔融物，经淬冷为粒化电炉磷渣，简称磷渣[1，2]。

The direct flotation tests of hematite from real samples of high intensity magnetic separation concentrate in weak acidic medium with fluosilicate or polymer silicic acid colloid as the depressor of iron containing silicate gangue natrosiderite and with anionic fatty acid sulfonate as the collector have all achieved good separation results.

针对包钢强磁精矿实际矿石样，分别以氟硅酸盐、聚合硅酸胶体作为含铁硅酸盐脉石霓石的选择性抑制剂，以阴离子脂肪酸磺酸盐为捕收剂，在弱酸性条件下进行赤铁矿的直接浮选，均取得了较好的分选指标。

To minimize the contamination of detrimental elements such as sulfurand chlorine, a two-step sol-gel process was successfully developed to synthesize SiC precursors with oxalic acid and hexamethylenetetramine HMTA as the catalysts, which are free of sulfur and chlorine. Tetraethoxysilane TEOS and phenolic resin were used as the silicon source and carbon source, respectively.

为了尽量减少硫、氯等有害元素的含量，本文用不含有害元素的草酸和六次甲基四胺HMTA为催化剂，正硅酸乙酯TEOS为硅源，酚醛树脂为碳源，成功探索出了制备SiC前驱体的两步法溶胶-凝胶工艺。

This article highlights the proprietary technology used to produce anhydrous hydrogen fluoride with fluorosilicic acid in foreign countries,as well as the scientific research achievem.

介绍了国外用氟硅酸生产无水氟化氢的专利技术以及四川大学的科研成果，认为经过中试获得必要的设计参数，便可推广应用，市场前景看好。

Various technologies, including direct or indirect methods, for the preparation of hydrogen fluoride and white carbon black from the byproduct fluosilicic acid of phosphate fertilizer are introduced, advantages and disadvantages of all the preparation methods are concluded.

介绍了直接法和间接法由磷肥副产的氟硅酸制备氟化氢和白炭黑的多种技术，总结了各种制备方法的优缺点。

Hydrogen peroxide solution with sodium metasilicate and magnesium sulfate had an enhanced effect on bleaching activity,whitening and softening Luffa pith.

在漂白液中加入硅酸钠和硫酸镁；可以增大双氧水的漂白活性，提高丝瓜络的白度，经EDTA溶液浸泡过的作品不易返黄。

Cerium-doped lutetium pyrosilicate crystal is a new found inorganic scintillator with promising scintillation properties.

铈掺杂的焦硅酸镥晶体是新近发现的一种具有潜在应用价值的无机闪烁晶体。

The main objective of this project is to apply the gel-casting technique, a novel ceramic forming method, in the development of IT-SOFCs. The gel-casting technique was investigated, modified and optimized to synthesize strontium doped lanthanum manganate La_(0.72Sr_(0.18)MnO_3, LSM, lanthanum strontium manganese chromite (La_(0.75)Sr_(0.25)_(1-x)Cr_(0.5Mn_(0.5)O_(3-δ), LSCM, LaCoO_3-based nano powders and lanthanum silicate apatite electrolyte powders.

本论文采用优化的凝胶注模工艺合成了以下粉体：Sr~(2+)离子掺杂的锰酸镧(La_(0.8)Sr_(0.2)_(0.9)MnO_3，LSM阴极粉体、Sr~(2+)和Mn~(2+)离子共掺杂的铬酸镧(La_(0.75)Sr_(0.25)_(1-x)Cr_(0.5Mn_(0.5)O_(3-δ)，LSCM阴极／阳极粉体、LaCoO_3阴极纳米粉体和磷灰石结构硅酸镧La_(10)Si_6O_(27)电解质粉体。

The effects of the ratio of chemical reagent and the reaction time on the mesostructure was also investigated.

考察了正硅酸乙酯的水解时间以及化合物的不同配比对材料形貌的影响。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。