| 摘要: | 近年來全球都在尋找替代能源和綠能發電，而熱電材料的出現為無汙染、高效率發電和製冷晶片提供了希望，因此熱電發電引起了許多關注。熱電材料是一種能將電能與熱能交互轉換的材料，此種材料能夠在足夠的溫差下產生電動勢，達到以熱生電的現象。相反的，也可以提供電流給它產生吸熱或放熱的效應，達到生熱與製冷的效果。判斷熱電材料轉換效率的好壞是依靠熱電優值(ZT)，所以如何提升ZT優值是我們該探討研究的。
本文研究N型 Mg2 (Si,Sn) 熱電材料。透過矽摻雜銻反應製作出N-type之奈米矽粉末，與鎂、錫、?粉末混合後冷壓成塊材，退火後形成鎂矽錫合金，再測試添加不同比例的錳矽化合物來改善其特性，找出最佳特性參數來製作模組，並量測其熱電特性。我們研究結果表明以Mg2.2(Si,Sn)+10% Mn5Si3 所得到的N型熱電材料在室溫~200°C之間具有0.3~0.5的ZT值。
本文研究單一輸出試片是使用銅片為電極，Mg2Sn為電極黏著材料，並一次性組裝電極去長時間退火。單一輸出試片進行熱電性能量測，最大輸出功率為1.0108 (μW)。
;In recent years, the world has been looking for alternative energy sources and green power generation. The emergence of thermoelectric materials provides hope for pollution-free, high-efficiency power generation and cooling chips. Therefore, thermoelectric power generation has attracted a lot of attention. A thermoelectric material is a material that can convert electrical energy and thermal energy interactively. This material can generate electromotive force under a sufficient temperature difference to achieve the phenomenon of generating electricity by heat. Conversely, it can also be supplied with current to produce heat absorption or heat release effects to achieve the effects of heat generation and cooling. Judging the conversion efficiency of thermoelectric materials depends on the thermoelectric figure of merit (ZT), so how to improve the ZT figure of merit is what we should discuss.
This paper studies N-type Mg2 (Si,Sn) thermoelectric materials. The N-type nanosilicon powder is produced through the reaction of silicon-doped antimony, mixed with magnesium, tin, and bismuth powder and cold pressed into a block, annealed to form a magnesium-silicon-tin alloy, and then tested by adding different proportions of manganese-silicon compounds to Improve its characteristics, find the best characteristic parameters to make a module, and measure its thermoelectric characteristics. Our research results show that the N-type thermoelectric material obtained with Mg2.2(Si,Sn)+10% Mn5Si3 has a ZT value of 0.3-0.5 between room temperature to 200°C.
In this paper, the single-output test sample uses copper as the electrode, Mg2Sn as the electrode adhesive material, and the electrode is assembled at one time for long-time annealing. The single output test sample is used for thermoelectric performance measurement, and the maximum output power is 1.0108 (μW). |
