bf3

Detailed introducing the physical and chemical property and safe technique of BF3 .

详细介绍了三氟化硼的物化性质以及安全技术。

This article is devoted to the separation of boron isotopes by the method of chemical isotope exchange distillation between BF3 and the complex anisole ?

本文采用化学交换反应精馏法分离硼同位素，通过三氟化硼与三氟化硼－苯甲醚络合物的化学交换反应，使得硼10同位素在液相富集，达到分离的目的。

The instrument consists of a long , narrow BF3 counter surrounded by a paraffin cylinder .

这台仪器包括一个细而长的BF3计数器和围着的一个石蜡圆柱形筒。

One of the factors is deterioration of the BF3 proportional counters . This problem is discussed in more detail .

特别是对BF3正比管组性能恶化的影响，我们作了比较详细的讨论。

Samples were extracted with ethyl acetate and were methylated with BF3 ether / methanol .

样品经提取后用三氟化硼-乙醚/甲醇，甲酯化处理。

Using the BF3 proportion counter , we measured the count rate of the photoneutron produced by W and D2O .

用BF3正比计数器测量了由W和D2O产生的光中子计数率。

The results show the THF · BF3 system is the best choice for preparing PECH with functionality near 2.0 , and the molecular weights are 1500 ~ 2000 .

实验结果表明，THF·BF3催化体系制备的PECH，相对分子质量1500～2000，平均官能度接近于2。

An BF3 counter array was used to measure D-D neutron yield ranging from 103-105 , and the measurement errors were between ± 20 % and ± 100 % .

通过BF3探测器阵列测到了DD中子产额。中子产额103~105，测量误差±20%到±100%。

Boron isotope abundance of ( CH3 ) 2O · BF3 complex was measured under the same instrument conditions when 10B isotope was concentrated , with the relative standard deviation of 1.095 % .

在同样的仪器条件下测定了硼同位素浓缩过程中样品三氟化硼甲醚络合物中的硼同位素丰度比，测定结果的相对标准偏差为1.095%。

By chemical exchange reaction and distillation between BF3 and the complex anisole · BF3 the separation character of boron-10 isotopes was studied . A mathematical model , proposed in this paper , was solved by a Matlab program .

采用化学交换反应精馏法，针对三氟化硼-苯甲醚分离体系，研究了硼同位素分离生产过程的特点，建立了交换精馏塔的稳态数学模型，并利用matlab程序进行模型求解。

The decomposition reaction of the complex an is ole · BF3 is indispensable during the separation of boron-10 isotopes by chemical isotope exchange distillation between BF3 and the complex anisole · BF3 .

三氟化硼-苯甲醚的分解反应是三氟化硼-苯甲醚络合物化学交换精馏法分离硼同位素不可缺少的步骤。

The phase state of the catalytic system of Ni ( naph ) 2-Al ( i-Bu ) 3 - ( BF3 · OEt2 + n-C8H ( 17 ) OH ) has been studied .

研究了Ni（naph）2－Al（i－Bu）3－（BF2·OEt2＋n－C8H（17）OH）催化体系的相态。

Counting rates of the BF3 long neutron counter and the liquid scintillation detector were simultaneously increased by a factor of 15 compared to the background . A recoil proton energy spectrum of 2.45 MeV neutrons was also measured by the liquid scintillation detector with n - γ discrimination .

长中子计数器和液体闪烁计数器的计数均比本底高15倍，液体闪烁计数器同时记录了2.45MeV中子的反冲质子能谱。

The synthesis of tetrahydrofuran copolymerized GAP binder includes two steps : THF and ECH ( epichlorohydrin ) are copolymerized with the help of catalyst ( BF3 · + diol ) through cation ring opening copolymerization to hydroxyl terminated THF-ECH copolyethers ;

四氢呋喃共聚型GAP粘合剂的合成分两个步骤：a.通过四氢呋喃（THF）和环氧氯丙烷（ECH）在BF3·加二元醇催化下的阳离子开环聚合反应合成端羟基THF－ECH共聚醚；

The neutron-flux is monitored by BF3 neutron-flux instrument . The neutron energies are determined by the method of cross section ratios for the reactions90Zr ( n , 2n ) 89'Zr by 93Nb ( n , 2n ) 92Nb .

照射时的中子注量变化由BF3中子监测仪监测，中子能量是用铌锆截面比法测定的。