hydrofluoric的例句大全

Etherification of ethanol and tert-butyl alcohol to ETBE ( ethyl tertiary butyl ether), using USY zeolite midified by hydrofluoric acid as the catalyst, was studied.

以氢氟酸改性USY为催化剂，乙醇和叔丁醇为原料，合成乙基叔丁基醚（ETBE）。

A reaction kinetic model for synthesis of ETBE from ethanol and tertiary butyl alcohol, catalyzed by HF/ USY modified by hydrofluoric acid, was established.

以乙醇和叔丁醇为原料、氢氟酸改性USY分子筛为催化剂合成乙基叔丁基醚，建立了反应动力学模型。

The purity of c – Si3N4 reached 100% after the recovered samples were treated with hydrofluoric acid at 440 K for 9 ― 10 h.

回收样品在440K左右经9～10h与氢氟酸反应处理后，c–Si3N4粉体的纯度接近100%。

After etching by hydrofluoric acid, PAA hollow microspheres were obtained.

经氢氟酸刻蚀后得到含偶氮苯的PAA中空微球。

Boron convert into BF4~ with concentrated hydrofluoric acid in advance.

预先用浓氢氟酸将硼转化成氟硼酸根，然后在pH4用氟硼酸根离子选择电极进行测量。

The FeSO_4 obtained by reduction is purified, adding to NH_4OH-NH_4HCO_3 solution containing organic additives, precipitated and finally washed and then calcined at 900 ℃ for 2 hours. The calcined product is washed using dilute nitric acid and hydrofluoric acid, obtaining high-purity α-Fe_2O_3.

还原后得到的硫酸亚铁经过净化除杂，滴加到含有适量有机添加剂的沉淀剂NH4OH-NH4HCO3中，沉淀洗涤干燥后900℃煅烧2h，煅烧产品再用稀硝酸和氢氟酸洗涤，得到高纯球形-αFe2O3。

The HP 4500 ICP-MS analysis of trace impurities in concentrated hydrofluoric acid used in semiconductor production was described.

研究了用HP4500型ICP-MS方法分析半导体用浓氢氟酸中的痕量杂质。

Ni-Mo type Hastelloy B alloy has good corrosion resistance in the hydrofluoric acid medium, but it is costly.

Ni Mo型的Hastelloy B合金用于氢氟酸介质中具有优良的耐蚀性能，但成本较高。

The hydrofluoric acid-hydrochloric acid-nitric acid-vitriol ( HF-HCl-HNO_3-H_2SO_4) system was used for the determination of 15 rare earth elements in the ash of plant by inductively coupled plasma mass spectroscopy ( ICP-MS).

采用高温灰化植物样本，氢氟酸盐酸硝酸硫酸一次溶解植物灰分，电感耦合等离子体质谱法（ICP MS）同时测定15种稀土元素。

Determination of Iron Oxide and Alumina in Export Phosphorus Rock by ICP-AES of Dissolving Sample with Hydrofluoric Acid

氢氟酸溶样ICP-AES法测定出口磷矿石中氧化铁和氧化铝

Method: Healthy Wistar rats were randomly divided into four groups: hydrofluoric acid burn group, gasoline burn group A, gasoline burn group B, and normal control group, 18 rats in each group.

方法：健康大鼠随机分为氢氟酸烧伤组、汽油烧伤A组和B组、正常对照组。氢氟酸烧伤组致2%Ⅲ度烧伤。

Steel samples were dissolved with nitric acid, hydrochloric acid and hydrofluoric acid by electrothermal heating or microwave digestion.

钢铁样品用硝酸、盐酸、氢氟酸在电热板上加热或微波消解，溶液经稀释后未经基体分离，未加内标直接用电感耦合等离子体质谱法（ICP-MS）测定。

The growth time and anode oxidize velocity control the thickness and porosity. Porous silicon layers were formed by anodization of Si wafers in hydrofluoric ( HF) solu-tion.

通过在阳极氧化反应中采用不同的HF溶液的浓度、电流密度和反应时间来控制多孔硅的膜厚、孔隙度等特性。

Porous silicon layers of different thickness and porosities are obtained using anodization method via controlling the hydrofluoric acid concentration, current density and time. The thick porous silicon layers are oxidized by a two-step oxidation method.

实验过程中通过控制阳极氧化反应中HF溶液的浓度、电流密度和反应时间形成了不同厚度和孔隙度的多孔硅厚膜，并采用两步氧化的方法得到氧化多孔硅厚膜。

Hydrofluoric is an extremely reactive agent.

氢氟酸是一种强烈的反应剂。

A colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride; solutions in water are hydrofluoric acid.

一种无色有毒腐蚀性液体，由硫酸作用于氟化钙而制成，溶于水中形成氢氟酸。

Hydrofluoric acid-etching and sandblasting had obvious effect on ceramic surface structure.

氢氟酸及喷砂处理对瓷表面形态改变明显。

if tantalum standard solution was prepared in hydrofluoric acid or ammonium oxalate medium, the hydrolyzation of tantalum could be prevented.

为了防止钽的水解，钽的标准溶液适宜用氢氟酸和草酸铵介质。

Side Effects of Hydrofluoric Acid on the Chemical Cleaning Silicon chip

氢氟酸在硅片化学清洗中的副作用

HF And let's take an example, HF, hydrofluoric acid, all right?

这里有个例子，氢氟酸，对吧？