求大神翻译

Thermoelectric materials have no noise, no pollution, small volume, long life and maintenance-free features make it have been applied in various fields.One of the main application is: temperature and thermoelectric refrigeration.Bi2Te3 thermoelectric material is optimal thermoelectric materials near room temperature performance, and it is used most widely in current research of thermoelectric materials, research the most in-depth.

This paper studies the Na and In double doped N type Bi2Te2. 7 se0. 3 effect the performance of thermoelectric materials.According to Bi (1.9 x) In0.02 NaxTe2.7 Se0.3 (x = 0, 0.02, 0.04, 0.06) for ingredients, vacuum sealed into the quartz tube, then all the raw materials in 1073 k smelting 8 hours.Then preparation into hot pressing block alloy, XRD phase structure is analyzed, and the thermal performance analysis of the sample.

The thermoelectric materials performance results show that the Bi2Te2. 7 se0. 3 material Seebeck coefficient is negative, suggests that for N type conductive.As Na doping content increasing, the Bi (1.9 x) In0.02 NaxTe2.7 Se0.3 thermoelectric materials conductivity also gradually rise.As Na doping content increasing, the Bi (1.9 x) In0.02 NaxTe2.7 Se0.3 thermoelectric materials of ZT values increase first, when the Bi (1.9 x) In0.02 NaxTe2.7 Se0.3 (x = 0.02) ZT value is the highest at 400 k, the value of 0.87, then drops rapidly.
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The thermoelectric material has no noise, no pollution, small size, long life maintenance and other characteristics, so it has been applied in various fields.. The main applications are: thermoelectric cooling and thermoelectric generator. Bi2Te3 based thermoelectric material is the best thermoelectric material near room temperature, and it is the most widely used thermoelectric material in the present research..
In this paper, the effect of Na and In dual doping on the properties of Bi2Te2.7Se0.3 N thermoelectric materials is studied.. In accordance with the Bi (1.9-x) In0.02NaxTe2.7Se0.3 (x=0, 0.02, 0.04, 0.06) ingredients, then all raw materials vacuum packaged into the quartz tube, the 1073K melting 8 hours. Then, the thermal pressure was prepared into bulk alloy, and then the structure of XRD was analyzed, and the thermoelectric properties of the samples were analyzed..
The results show that the Seebeck coefficient of Bi2Te2.7Se0.3 material is negative, which indicates that the N is the type of conduction.. With the increase of Na content, the electrical conductivity of Bi (1.9-x) In0.02NaxTe2.7Se0.3 thermoelectric materials gradually increased.. With the increasing of the content of Na doped, Bi (1.9-x) In0.02NaxTe2.7Se0.3 thermoelectric materials ZT value first increases, when the Bi 1.9-x In0.02NaxTe2.7Se0.3 (x = 0.02) in 400k is ZT value, the highest value of 0.87, then decreased rapidly.
顺便说一句，楼上是有道翻译翻译的。我是百度翻译，翻译这些不必用求助，网上翻译软件一大把，但未必翻译出来是正确的。

Thermoelectric materials are widely used invarious fields due to its noise free, pollution free, small volume, long life,and maintenance-free characteristics. Of which the most important application is thermoelectric power generation andthermoelectric cooling. Bi2Te3 based thermoelectric material is the bestthermoelectric material around room temperature, and it is now one of the mostlyapplied and deepestly studied thermoelectric materials.
This paper studies the effect of Na and Inco-doping on the properties of N-type Bi2Te2.7Se0.3 double. The compounding iscarried out according Bi (1.9-x) In0.02NaxTe2.7Se0.3 (x = 0, 0.02, 0.04, 0.06) ,all of the raw materials is packed into a quartz tube under vacuum, melting at1073K for 8 hours. Then the raw materials are prepared into bulk alloy, furthermorethe XRD is carried out to analyze the phase structure and thermoelectric propertiesof the samples.
The property results of the thermoelectricmaterial show that the Seebeck coefficient of Bi2Te2.7Se0.3 material isnegative, indicating that is a N-type conductivity. With the gradual increasein the doping content of Na, the conductivity of Bi (1.9-x) In0.02NaxTe2.7Se0.3thermoelectric material is gradually increased. With the gradual increase inthe doping content of Na, the ZT value of Bi (1.9-x) In0.02NaxTe2.7Se0.3thermoelectric material increases firstly, when Bi (1.9-x) In0.02NaxTe2.7Se0.3(x = 0.02 )is at 400K the ZT value achieves the maximum, it is 0.87, and thendecline rapidly.