This paper introduced the design and application of automatic heating equipment for Auger Emission Spectroscopy(AES).The special electric furnace used in the AES was designed,the Al_2O_3 glass window which allows both...This paper introduced the design and application of automatic heating equipment for Auger Emission Spectroscopy(AES).The special electric furnace used in the AES was designed,the Al_2O_3 glass window which allows both visible light and infrared ray to pass through was made,and the MA2S/B thermo-meter based on infrared ray radiant energy from the sample was selected.The equipment gives dynamic analyzingby AES.It offers possibilities for widening the fields of materials surface and interface research.As a sample,the FeCr_(17) alloy was studied by in situ AES in the heating progress with the help of automaticheating equipment.展开更多
High-power vertical-cavity surface-emitting lasers（VCSELs） are processed using a wet thermal-selective oxidation technique.The VCSEL chips are packaged by employing three different bonding methods of silver solder,I...High-power vertical-cavity surface-emitting lasers（VCSELs） are processed using a wet thermal-selective oxidation technique.The VCSEL chips are packaged by employing three different bonding methods of silver solder,In-Sn solder,and metalized diamond heat spreader.After packaging,optical output power, wavelength shift,and thermal resistance of the devices are measured and compared in an experiment.The device packaged with a metalized diamond heat spreader shows the best operation characteristics among the three methods.The 200-μm-diameter device bonded with a metalized diamond heat spreader produces a continuous wave optical output power of 0.51 W and a corresponding power density of 1.6 kW/cm^2 at room temperature.The thermal resistance is as low as 10 K/W.The accelerated aging test is also carried out at high temperature under constant current mode.The device operates for more than 1000 h at 70℃,and the total degradation is only about 10%.展开更多
基金Project Sponsored by National Sience and Technology Ministry(JG-98-14)
文摘This paper introduced the design and application of automatic heating equipment for Auger Emission Spectroscopy(AES).The special electric furnace used in the AES was designed,the Al_2O_3 glass window which allows both visible light and infrared ray to pass through was made,and the MA2S/B thermo-meter based on infrared ray radiant energy from the sample was selected.The equipment gives dynamic analyzingby AES.It offers possibilities for widening the fields of materials surface and interface research.As a sample,the FeCr_(17) alloy was studied by in situ AES in the heating progress with the help of automaticheating equipment.
基金supported by the National Natural Science Foundation of China under Grant Nos.60676025 and 60306004.
文摘High-power vertical-cavity surface-emitting lasers（VCSELs） are processed using a wet thermal-selective oxidation technique.The VCSEL chips are packaged by employing three different bonding methods of silver solder,In-Sn solder,and metalized diamond heat spreader.After packaging,optical output power, wavelength shift,and thermal resistance of the devices are measured and compared in an experiment.The device packaged with a metalized diamond heat spreader shows the best operation characteristics among the three methods.The 200-μm-diameter device bonded with a metalized diamond heat spreader produces a continuous wave optical output power of 0.51 W and a corresponding power density of 1.6 kW/cm^2 at room temperature.The thermal resistance is as low as 10 K/W.The accelerated aging test is also carried out at high temperature under constant current mode.The device operates for more than 1000 h at 70℃,and the total degradation is only about 10%.
