五氧化二磷

采用31pNMR波谱对高碳脂肪醇与五氧化二磷的反应进行了研究，定量地表征了产物混合物中的各组分。

Phosphorylation of high fatty alcohol with phosphorus pentoxide was studied with the aid of 31 P NMR spectrum .

五氧化二磷升华制备p-n结，对方块电阻影响最大的是反应时间，其次是气流量和硅片反应温度，P2O5升华温度影响较小。

Preparation p-n junction by phosphorus pentoxide sublimation , the most influence on square resistance is reaction time followed by flow and silicon reaction temperature , the least is phosphorus oxychloride diffusion .

采用化学气相沉积法，研究了五氧化二磷对Hβ分子筛酸性和孔结构的改性。

The structure and the acidic properties of H β zeolite were modified with phosphorus pentoxide added by using chemical vapour deposition method .

第三步：由GM与磷酸化试剂五氧化二磷进行磷酸酯化反应，而后水解、碱中和，即制得终产物聚醚改性硅氧烷磷酸酯盐（PK）。

The last step was that GM was phosphated by phosphating agent-phosphorous pentoxide ( P205 ), then hydrolysised , basic neutralized to obtain the final products-PK .

五氧化二磷是正磷酸（H3PO4）的酸酐。

Phosphorous acid is the acid anhydride of orthophosphoric acid ( H3 PO4 ) .

按GB/T10209.2-2001规定，磷酸二铵（DAP）中有效五氧化二磷的整个测定过程需时约3h。

As specified in the standard GB / T 10209.2 2001 , the whole process of determination of available P 2O 5 in diammonium phosphate ( DAP ) requires about 3 hours .

三氯氧磷扩散与五氧化二磷升华制备p-n结的均匀性比较中，用五氧化二磷升华制备出的p-n结要更加均匀。

In the uniformity comparison of preparation p-n junction by phosphorus oxychloride diffusion and by phosphorus pentoxide sublimation , it is more uniformity that p-n junction preparation by phosphorus pentoxide sublimation .

通过实验提出了合成该阻燃剂的最佳反应条件为：双季戊四醇（DPE）、五氧化二磷、水和三聚氰胺反应物料摩尔配比为1／2.5／2.0／3.45、反应时间4h和反应温度120℃。

IFR was synthesized under optimal reaction conditions with molar ratio of dipentaerythritol ( DPE ), phosphoric pentoxide , water , and melamine 1 / 2 . 5 / 2 . 0 / 3 . 45 , for 4 h at 120 ℃ .

酸碱滴定法快速测定萃取料浆中五氧化二磷含量

Rapid Determination of Phosphorus Pentoxide in Extraction Paste by Acid-Base Titration

大洋多金属结核中五氧化二磷分析方法

Analytical method of P 2O 5 in the oceanic polymetallic nodules

分光光度法测定碳酸盐岩石中五氧化二磷的含量

Determination of Phosphorus Pentoxide Content in Carbonate Rocks by Spectrophotometry

五氧化二磷基非晶态铜离子导体的制备及电导研究

Preparation and conductivity of p_2o_5-based non-crystalline copper ionic conductors

用硼酸与月桂醇和五氧化二磷反应合成了含磷硼酸酯润滑油添加剂。

The synthesis of borate ester containing nitrogen as lubricant additive was studied .

五氧化二磷测定方法的比较

Comparison of various analytical methods for determination of P_2O_5

称样量对测定复混肥中水溶五氧化二磷含量的影响

The weighing samples affect on content of water-solubility P 2O 5 in compound fertilizer

助催化剂五氧化二磷对钒催化剂活性影响的规律性

The Regularity About the Effect of the Promoter P_2O_6 on the Activity of Vanadium Pentoxide Catalyst

铋盐-钼蓝示差光度法测定磷矿石中五氧化二磷

Determination of Phosphorus Pentoxide in Phosphate Ore by Bismuth Salt - molybdenum Blue Parallax Photometric Method

流动注射分析法对复合肥中五氧化二磷的分析

The Method of Flowing Injection Analysis for Phosphoric Anhydride in the Productive Process of NPK Compound Fertilizers

本论文对以五氧化二磷和无水氟化氢为原料制备五氟化磷的工艺和五氟化磷在乙醚中的溶解度进行了初步研究。

This paper relates to the preparation of phosphorus pentafluoride and the solubility of phosphorus pentafluoride in aether .

注意事项（1）二氯甲烷加入五氧化二磷蒸馏，加入分子筛储存。

Note . ( 1 ) The dichloromethane is distilled from phosphorus pentoxide and stored over molecular sieves .

GB/T6609.17-1986氧化铝化学分析方法钼蓝光度法测定五氧化二磷量

Methods for chemical analysis of aluminium oxide & The molybdenum blue photometric method for the determination of phosphorus pentoxide content

以环氧氯丙烷、五氧化二磷和二乙烯三胺为原料，合成一种性能稳定的亲水阻燃剂。

Taking chloropropylene oxide , phosphoric anhydride , divinyl triamine as raw materials , the stable and hydrophilic flame retardant was synthesized .

试样经碱熔，酸化后，以磷-钼-钒黄分光光度法测定五氧化二磷；

After the sample had been acidulated and dissolved by soda.P-Mo-V xanthic acid spectrophotometry was used to determine the content of P_2O_5 .

简要介绍了使用五氧化二磷作为磷酸化试剂合成磷酸酯的工艺过程改进，以及磷酸单双酯含量检测的常用方法。

The modification of synthesizing processes of phosphates with P2O5 and testing method of the content of monoester and diester were introduced briefly .

适用于磷矿石中5%～38%五氧化二磷的测定。

The method is suited to determine the phosphorus pentoxide contents with the range of 5 % ~ 38 % in phosphate ores .

测定六氟化硫气体中痕量水，其测定结果与五氧化二磷电解法基本相符。

The determination result of the trace water in SF 6 by the improved device tallies with that by P 2O 5 electrolysis method .

以添加不同含量五氧化二磷的热塑性酚醛树脂为前驱体，经热固化后升温至700℃裂解制备掺磷树脂裂解炭。

Phosphorus-doped phenolic resin carbon was prepared by low temperature ( 700 ℃) pyrolysis of thermoplastic phenolic resin containing different amounts of phosphorus pentoxide after curing .

微波在磷钼酸铵容量法快速测定磷矿石中五氧化二磷的应用重铬酸钾容量法快速测定铜矿石中的铁

Application of microwave in determination of P_2O_5 in phosphate rock by ammonium phosphomolybdate volumetric method Rapid Determination of Iron in Copper Ore by Potassium Dichromate Volumetry

以乙二醇、环氧氯丙烷、烷基叔胺和五氧化二磷为原料，合成了一种磷酸酯两性表面活性剂。

A series of new type phosphate amphoteric surfactants were synthesized by using ethylene glycol , epichlorohydrin , alkyl tertiary amine and phosphorus pentoxide as raw materials .

以蓖麻油和改性后的蓖麻油醇酸为主要原料，与磷酸化试剂五氧化二磷在65～75℃进行酯化反应，合成了一种具有较好加脂作用的磷酸酯加脂剂。

This paper briefly recounts that a new leather fatliquoring agent was synthesized by reacting castor oil and modified castor oil acid with P2O5 at65 ~ 75 ℃ .