Barium titanate based PTC ceramics doped by Nb-Si-Mn heterogeneous nucleation surface deposition method;

Study on the heterogeneous nucleationof CaO/Al2O3/SiO2 system glasses;

For the homogeneous mixing of BaTiO_3(BT) powders with dopants and the exact control of the microstructures,phases and electrical properties of materials,a heterogeneous nucleation method was used to coat dopant Y(OH)_3 on the surface of nano-crystallized hydrothermal BT powders.

Preparation methods of BaTiO3-based PTC ceramic powder with surface modifying techniques (particle surface modifying method; citrate solution-liquid phase coating method; polyacrylamide gel-liquid phase coating method and so on) were introduced,especially the principle,characteristic,research status and applied prospect of heterogeneous nucleation surface coating process.

Ferrite MgFe2O4 coated carbonyl iron composite powder was prepared by heterogeneous nucleation combined with the liquid deposition method to improve the oxidation resistance performance of carbonyl iron powder.

Al_2O_3 nanosized composite powders encapsulated by ZrO_2(3Y) were prepared by heterogeneous nucleation combined with the co-deposition and were molded by dry pressing.

ZrO_2(3Y)encapsulated Al_2O_3 nano composite powders were prepared by heterogeneous nucleation combined with the liquid co-deposition method using pH buffer solution as precipitator.

The homogeneous nucleation and the non-homogeneous nucleation of argon vapor molecules in the process of condensation were studied by molecular dynamic simulation.