Effect of temperature gradient on simultaneously experimental determination of thermal expansion coefficients and elastic modulus of thin film materials

2004 ◽  
Vol 96 (7) ◽  
pp. 3800-3806 ◽  
Author(s):  
Tei-Chen Chen ◽  
Wen-Jong Lin ◽  
Dao-Long Chen
Keyword(s):  
Thin Film ◽  
Thermal Expansion ◽  
Elastic Modulus ◽  
Temperature Gradient ◽  
Experimental Determination ◽  
Effect Of Temperature ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients

Measurement of thermal expansion coefficient of substrate GGG and its epitaxial layer YIG

1999 ◽  
Vol 14 (1) ◽  
pp. 2-4 ◽  
Author(s):  
Rui-sheng Liang ◽  
Feng-chao Liu
Keyword(s):  
Thin Film ◽  
Thermal Expansion ◽  
Single Crystal ◽  
Thermal Expansion Coefficient ◽  
Epitaxial Layer ◽  
Expansion Coefficient ◽  
Linear Thermal Expansion ◽  
New Method ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients

A new method is used in measuring the linear thermal expansion coefficients in composite consisting of a substrate Gd3Ga2Ga3O12 (GGG) and its epitaxial layer Y3Fe2Fe3O12 (YIG) within the temperature range 13.88 °C–32.50 °C. The results show that the thermal expansion coefficient of GGG in composite is larger than that of the GGG in single crystal; the thermal expansion coefficient of thick film YIG is also larger than that of thin film. The results also show that the thermal expansion coefficient of a composite consisting of film and its substrate can be measured by using a new method.

Experimental Inverstigation on Thermal Expansion Coefficients of SnO2 Thin Film

2012 ◽  
Vol 591-593 ◽  
pp. 965-968
Author(s):  
Jing Wang ◽  
Hong Lai Li ◽  
Mei Hua Liu
Keyword(s):  
Thin Film ◽  
Thermal Expansion ◽  
Real Time ◽  
Correlation Method ◽  
Wide Band ◽  
Electric Heating ◽  
Image Correlation ◽  
Real Time System ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients

As a kind of wide band-gap material focused on in recent years, SnO2 thin Film with μm level has been widely applied in many fields such as solar cells, electric heating devices, transparent electrodes, and gas sensors, ect. This paper develops a real-time system to measure thermal expansion coefficients of SnO2 thin film, which can obtain directly surface morphology information of the samples. Micro-imaging and digital image correlation method is adopted to investigate the correlation by comparing the object surface image before deformation with that after deformation. Because of the lower demand for measurement environment and no damage to object, it’s easy to acquire on-line images, calculate synchronously and display real-time results. In the paper, thermal expansion coefficients of SnO2 thin film are determined in situ with change of the temperature. Both of ceramic and SnO2 thin film have shown anisotropy thermal expansion, thermal and residual stress appears between the ceramic substrate and SnO2 thin film as a result of thermal expansion coefficients mismatch. According to experimental results, the maximum stress values can be calculated between film and substrate and inside the substrate.

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