분야
ppt2.PTCR materials behavior
3.Other Characteristics
4.Principle of PTC ceramics
5.The Heywang model
6.BaTiO₃
7.perovskite structure
8.How can we control the curie-temperature?
9.Applications
10.Design a novel device
unit cell volume decreases and the phase transition temperature decreases
An insulator at room temperature becomes semiconductive after doping
trivalent donars (e.g. La, Sb, Y) substitute for the Ba2+
pentavalent donars (e.g. Sb, Nb, Ta) substitute for Ti4+.
와인 보관 창고
적정온도 : 7-13도
더 낮은 온도에서 보관하게 되면 향이 없어지고 높은 온도에서 보관하면 시큼해진다.
