本文選題：PbTe熱電材料 + 半固態(tài)粉末成形法��； 參考：《浙江大學(xué)》2015年碩士論文

【摘要】：本學(xué)位論文結(jié)合國(guó)家自然科學(xué)基金項(xiàng)目“基于熱電材料的層疊陣列型溫差發(fā)電構(gòu)件及其半固態(tài)粉末微成形理論與研究方法”(資助號(hào)：51175460),以中溫段熱電材料碲化鉛(PbTe)作為研究對(duì)象,開(kāi)展了PbTe塊體材料的半固態(tài)粉末成形制造及其熱電性能研究。首先,提出了將半固態(tài)粉末成形技術(shù)應(yīng)用于PbTe塊體熱電材料的制造,并確定了具體制造工藝和所得塊體熱電材料的測(cè)試方法。其次,采用半固態(tài)粉末成形法制造了n型PbTe塊體熱電材料,分析了所得塊體熱電材料的物相和微觀組織形貌,對(duì)比研究了其熱電性能。在此基礎(chǔ)上,研究了高能球磨法對(duì)n型PbTe塊體熱電材料性能的影響,分析了不同球磨時(shí)間條件下制備的n型PbTe納米粉末的物相、微觀組織形貌和化學(xué)組成,并研究了用該最優(yōu)納米粉末制造得到的n型PbTe塊體熱電材料的性能。最后,采用高能球磨法制備了p型PbTe納米粉末,分析了所得納米粉末的物相與微觀形貌,并將納米粉末采用半固態(tài)粉末成形工藝制造成p型PbTe塊體熱電材料,對(duì)比分析了所得塊體熱電材料的微觀組織形貌及其熱電性能。第1章,闡述了本學(xué)位論文研究的背景與意義,詳細(xì)介紹了熱電材料及其制備和制造工藝的研究現(xiàn)狀,在此基礎(chǔ)上,提出了本學(xué)位論文的主要研究?jī)?nèi)容和論文框架。第2章,針對(duì)PbTe塊體熱電材料的晶粒尺寸難以控制,樣品機(jī)械性能差以及無(wú)法實(shí)現(xiàn)大批量、低成本和高效率的生產(chǎn)等制造難題,提出了將半固態(tài)粉末成形技術(shù)應(yīng)用于PbTe塊體熱電材料的制造,并確定了具體制造工藝和所得塊體熱電材料的測(cè)試方法。第3章,采用半固態(tài)粉末成形法制造了n型PbTe塊體熱電材料,分析了所得塊體熱電材料的物相和微觀組織形貌,研究了其物理性能、熱電性能和機(jī)械性能,并與常規(guī)制造方法制造的塊體熱電材料進(jìn)行了對(duì)比分析。第4章,研究了高能球磨法對(duì)n型PbTe塊體熱電材料性能的影響,分析了不同球磨時(shí)間條件下制備的n型PbTe納米粉末的物相、微觀組織形貌和化學(xué)組成,并研究了用該最優(yōu)納米粉末制造得到的n型PbTe塊體熱電材料的性能。第5章,采用高能球磨法制備了p型PbTe納米粉末,分析了所得納米粉末的物相與微觀形貌,并將納米粉末采用半固態(tài)粉末成形工藝制造成p型PbTe塊體熱電材料,對(duì)比分析了所得塊體熱電材料的微觀組織形貌及其熱電性能。第6章,總結(jié)了論文的主要研究工作,并展望了未來(lái)的研究工作。
[Abstract]:This dissertation is based on the National Natural Science Foundation of China, "stacked array thermoelectric components based on thermoelectric materials and their semi-solid powder microforming theory and research methods" (Grant No.: 51175460). PbTe2 as a research object, The semi-solid powder forming and thermoelectric properties of PbTe bulk materials were studied. Firstly, the semi-solid powder forming technology is applied to the manufacture of PbTe bulk thermoelectric material, and the specific manufacturing process and the test method of the obtained bulk thermoelectric material are determined. Secondly, n-type PbTe bulk thermoelectric materials were fabricated by semi-solid powder forming method. The phase and microstructure of the bulk thermoelectric materials were analyzed and the thermoelectric properties were compared. On this basis, the effect of high-energy ball milling on the properties of n-type PbTe bulk thermoelectric materials was studied. The phase, microstructure and chemical composition of n-type PbTe nano-powders prepared under different milling time were analyzed. The properties of n-type PbTe bulk thermoelectric materials fabricated from the optimized nano-powders were studied. Finally, p-type PbTe nanocrystalline powder was prepared by high-energy ball milling method. The phase and microstructure of the nano-powder were analyzed, and the p-type PbTe bulk thermoelectric material was prepared by semi-solid powder forming process. The microstructure and thermoelectric properties of the bulk thermoelectric materials were compared and analyzed. In chapter 1, the background and significance of this dissertation are described, and the research status of thermoelectric materials, their preparation and manufacturing processes are introduced in detail. On the basis of this, the main research contents and the framework of this dissertation are put forward. In Chapter 2, the grain size of PbTe bulk thermoelectric materials is difficult to control, the mechanical properties of samples are poor, and the manufacturing problems such as mass production, low cost and high efficiency can not be realized. The semi-solid powder forming technology is applied to the manufacture of PbTe bulk thermoelectric material, and the specific manufacturing process and the test method of the obtained bulk thermoelectric material are determined. In chapter 3, n-type PbTe bulk thermoelectric materials were fabricated by semi-solid powder forming method. The phase and microstructure of the bulk thermoelectric materials were analyzed, and their physical, thermoelectric and mechanical properties were studied. The results are compared with the bulk thermoelectric materials made by conventional manufacturing methods. In chapter 4, the effect of high-energy ball milling on the properties of n-type PbTe bulk thermoelectric materials was studied. The phase, microstructure and chemical composition of n-type PbTe nano-powders prepared under different milling time were analyzed. The properties of n-type PbTe bulk thermoelectric materials fabricated from the optimized nano-powders were studied. In chapter 5, p-type PbTe nanocrystalline powder was prepared by high-energy ball milling. The phase and microstructure of the nano-powder were analyzed, and the p-type PbTe bulk thermoelectric material was prepared by semi-solid powder forming process. The microstructure and thermoelectric properties of the bulk thermoelectric materials were compared and analyzed. Chapter 6 summarizes the main research work and looks forward to the future research work.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB34

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本文編號(hào)：1917606