【作者】 周子鹏； 赵红霞； 韩吉田；

【Author】 Zhou Zipeng,ZHAO Hongxia,HAN Jitian (School of Power and Energy,Shandong University,Jinan250061,Shandong,china)

【机构】 山东大学能源与动力工程学院；

【摘要】 水的过冷受到诸多因素的影响,水的过冷度的研究对冰蓄冷和生物低温保存具有重大意义。对在0.01T的稳恒弱磁场作用下水的冻结过程进行了实验研究,发现磁场作用能够在一定程度上降低水的最低不结晶温度,增大过冷度,而且过冷度的增大与磁场强度成正比关系。而对于氯化钠溶液来说,当溶液浓度达到一定值后,磁场可以降低溶液的凝固点,同时提高溶液的最低不结晶温度,从而减小过冷度。其中磁场的这种作用可能与水分子间的氢键形成和溶液中离子的洛伦兹力有关。更多还原

【Abstract】 The super-cooling of water is affected by many factors.The research of water subcooling is of great significance in the field of ice storage and cryobiology.In this study experiments were carried out to investigate the subcooling of water under 0.01 T constant weak magnetic fields.It is found out that the magnetic field can,to some extent,reduce the possible lowest unfrozen temperature and increase subcooling.Besides the subcooling increases is proportional to magnetic field intensity.And for sodium chloride solution,when solution concentration reaches a certain value,the field can reduce the freezing points,improve the possible lowest unfrozen temperature and reduce subcooling.This effect is thought to be related to the formation of water molecular hydrogen bonds and the lorentz force of solution ion.更多还原