According to the results of TEM, XRD, Ba/Ti (molar ratio) and specific surface area, the crystallization process of barium titanate followed the “dissolution-precipitation” mechanism in the hydrothermal synthesis with single water medium that contained a aggregation-growth.

Based on the three dimensional model of etching figure,this method can be used to study:(1) crystal symmetry theoretic signification of the etching figure and the crystallographic orientation of minerals in rocks;(2) crystal defects and their crystallographic orientations for indicating the geological environments;and(3) anisotropy characteristics of the crystal dissolution mechanism.

This technology coupled a fractional ultrafiltration separation system as well as two portions(is 30~100 ku,more than 100 ku),with the solvating-out crystallization,by which curdlan with the purities of 96.

Simulate model of electrioultrafiltration solvating-out crystallization (EUSOC) was established by dimension analysis, and the control model of EUSOC was achieved based on regression of laboratory experiment data.

The effect of ultrasonic on riboflavin dilution crystallization was studied in this thesis.

Some new research fields were extended in recent years,for instance,study on mixing technique of diluent entrance,where mixing situation markedly affect crystal characteristics and study on finely crystal preparation by dilution crystallization coupled with supercritical fluid technique.