A New Model for Exchange of Deuterium in Oxide Ceramics for Protium in Light Water Molecule at Room Temperature
A New Model for Exchange of Deuterium in Oxide Ceramics for Protium in Light Water Molecule at Room Temperature
复制标题
室温下氧化物陶瓷中的氘与轻水分子中的氕交换的新模型
DOI：
10.1080/18811248.2001.9715119
复制
发表时间：
2001
影响因子：
1.2
通讯作者：
H. Iwahara
中科院分区：
文献类型：
--
作者：
K. Morita;Hironori Suzuki;E. Iizuka;Tomokazu Hayashi;K. Soda;H. Iwahara
本文提出了氧化物陶瓷中的氘（D）与轻水分子中的氚（H）交换的单向扩散模型：由于表面H_2O解离而引起的质子吸附和OH ~-吸附，质子扩散，由于与质子的局部分子复合而在俘获位置释放氘，随后另一个质子被俘获到空的俘获位置。单向扩散模型已经以自由质子以及被捕获在捕获位点中的质子和氘核的质量平衡方程的形式被制定，该质量平衡方程包括上述质子的化学反应的速率常数。用实验数据拟合了样品中保留的氘核浓度和吸收的质子浓度的解，并确定了与D-H交换有关的化学反应速率常数。讨论了化学反应的速率常数。此外，单向扩散模型的潜在应用进行了讨论。
For exchange of deuterium (D) in oxide ceramics for protium (H) in light water molecule at room temperature is proposed the one way diffusion model: absorption of proton and adsorption of OH- due to dissociation of H2O at the surface, diffusion of proton, release of deuteron in trapping site due to local molecular recombination with proton and the subsequent trapping of another proton into the vacant trapping site. The one way diffusion model has been formulated in form of the mass balance equations for free proton and both proton and deuteron trapped in trapping sites which include the rate constants of chemical reactions for proton described above. The solutions of the concentrations of deuterons retained and protons uptaken in the specimen have been fitted to the experimental data and the rate constants of the chemical reactions relevant to the D-H exchange have been determined. The rate constants of the chemical reactions are discussed. Moreover, potential applications of the one way diffusion model are discussed.