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
In order to realize tobacco curing with energy saving and emission reduc- ing and lower cost, the waste heat recovering equipment was designed and built on blowing-upward type bulk curing barn. The comparative experim...In order to realize tobacco curing with energy saving and emission reduc- ing and lower cost, the waste heat recovering equipment was designed and built on blowing-upward type bulk curing barn. The comparative experiment of tobacco leaf curing was conducted between a bulk curing barn with waste heat of flue gas and conventional bulk curing barn. The results showed that the effect of saving coal in bulk curing barn with waste heat of flue gas was obvious than the contrast. The coal consumption quantity was 1.531 kg per kg of dry tobacco leaf. The saving coal in bulk curing barn with use waste heat of flue gas was 0.181 kg per kg of dry tobacco leaf than the contrast and saving coal rate was 10.57%. The electricity consumption quantity was 0.593 kWh per kg of dry tobacco leaf. The saving elec- tricity quantity in bulk curing barn with use waste heat of flue gas was 0.022 kWh/kg and the saving electricity rate was 3.58% than the contrast. The saving curing cost was 0.158 yuan per kg of dry tobacco leaf and saving cost rate 9.09% in bulk cur- ing barn with use waste heat of flue gas than the contrast. The appearance quality, grade structure and primary chemical composition had no significant difference be- tween bulk curing barn with use waste heat of flue gas and the contrast.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 Hebei Industrial Co.,LTD.of China Tobacco(111201315524)Qiannan Co.LTD.Of Guizhou Industrial Co.,LTD.,China Tobacco([2012]17)~~
文摘In order to realize tobacco curing with energy saving and emission reduc- ing and lower cost, the waste heat recovering equipment was designed and built on blowing-upward type bulk curing barn. The comparative experiment of tobacco leaf curing was conducted between a bulk curing barn with waste heat of flue gas and conventional bulk curing barn. The results showed that the effect of saving coal in bulk curing barn with waste heat of flue gas was obvious than the contrast. The coal consumption quantity was 1.531 kg per kg of dry tobacco leaf. The saving coal in bulk curing barn with use waste heat of flue gas was 0.181 kg per kg of dry tobacco leaf than the contrast and saving coal rate was 10.57%. The electricity consumption quantity was 0.593 kWh per kg of dry tobacco leaf. The saving elec- tricity quantity in bulk curing barn with use waste heat of flue gas was 0.022 kWh/kg and the saving electricity rate was 3.58% than the contrast. The saving curing cost was 0.158 yuan per kg of dry tobacco leaf and saving cost rate 9.09% in bulk cur- ing barn with use waste heat of flue gas than the contrast. The appearance quality, grade structure and primary chemical composition had no significant difference be- tween bulk curing barn with use waste heat of flue gas and the contrast.
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%.
