The growth and orientation of zeolite crystals on a glass substrate was investigated by changing the roughness and setting of the substrate surface.The orientation control of crystals on the glass substrate was achieved.It was found that the setting and treatment of the glass substrate had a substantial effect on crystal orientation.When the substrate surface was upward

the preferential growth of crystal was along the a-axis.However

the preferential growth of crystal was along b-axis when the substrate surface was downward.According to experimental results

a film formation mechanism was proposed to account for the growth and orientation of crystals on the glass substrate.