摘要
为了测量纳米材料的热扩散率,采用激光光热位移技术测量了不同频率下热位移的相位,由相位的拟合曲线得到材料热扩散率的方法,得到了不同退火温度下纳米TiO2热扩散率。结果表明,纳米TiO2的热扩散率随退火温度升高而减小。
A method for measuring diffusivity of nanometer material by means of laser photothermal displacement technique is presented,which measures the phase of thermal displacement in different frequencies and gives the diffusivity of material by fitted curves of phase. Experimental results of the diffusivity of nanometer TiO2 at different annealing temperatures are given and the results indicate that the diffusivity of nanometer TiO2 decreases while the annealing temperature rises.
出处
《激光技术》
CAS
CSCD
北大核心
2007年第1期29-30,共2页
Laser Technology
关键词
激光技术
热扩散率测量
光热位移技术
纳米材料
laser technique
thermal diffusivity measurement
photothermal displacement technique
nanometer material
