topochemical

It is shown that expansible ettringite forms in the topochemical reaction,and crystallizes in-situ on the surface of unhydrated aluminate minerals and orients radially.

发现能够产膨胀的钙矾石是由局部化所成；它们在未水化的铝酸盐矿物表面原地结晶，呈放射状。

The expansion mechanism of hydroxide expanding phase for oil well cement slurry are discussed on the basis of principle of chemical thermodynamics and topochemical reaction model.

要基于膨胀剂原地模型和化热力原理，讨论了晶压的源动力及水泥浆积膨胀与结晶压的关系。