聚合物造粒对Bi_2Se_(0.3)Te_(2.7)粉末流动性和热电性能的影响
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摘要
采用聚合物造粒的方法,将聚乙烯醇溶液(PVA)和n型Bi_2Se_(0.3)Te_(2.7)粉末按一定的配比混合,研究聚合物造粒对Bi_2Se_(0.3)Te_(2.7)热电性能的影响。结果表明:造粒后粉体样品的粒径尺寸明显增加,流动性显著提升,其中以PVA与Bi_2Se_(0.3)Te_(2.7)质量比1∶10造粒样品的流动性最好;造粒前后,块体样品的电导率、Seebeck系数以及热导率变化范围约在10%以内,总体ZT值变化不大,并且以PVA与Bi_2Se_(0.3)Te_(2.7)质量比1∶10造粒样品和Bi_2Se_(0.3)Te_(2.7)样品的ZT值在测试范围内几乎相同,均在475 K时达到最大值,约为0. 56左右。
In this paper,the influence of polymer granulation on the thermoelectric properties of Bi_2Se_(0.3)Te_(2.7) was studied by mixing the polyvinyl alcohol solution( PVA) and n type Bi_2Se_(0.3)Te_(2.7) powder in varous proportions. The results show that the particle size and the fluidity of the powder increase significantly after granulation,where the best fluidity occurs when the mass ratio of PVA to Bi_2Se_(0.3)Te_(2.7) at 1 ∶ 10. The variation of electrical conductivity,Seebeck coefficient and thermal conductivity of the bulk samples before and after granulation is less than 10%,which results in a little changed maximum ZT about 0. 56 at 475 K.
In this paper,the influence of polymer granulation on the thermoelectric properties of Bi_2Se_(0.3)Te_(2.7) was studied by mixing the polyvinyl alcohol solution( PVA) and n type Bi_2Se_(0.3)Te_(2.7) powder in varous proportions. The results show that the particle size and the fluidity of the powder increase significantly after granulation,where the best fluidity occurs when the mass ratio of PVA to Bi_2Se_(0.3)Te_(2.7) at 1 ∶ 10. The variation of electrical conductivity,Seebeck coefficient and thermal conductivity of the bulk samples before and after granulation is less than 10%,which results in a little changed maximum ZT about 0. 56 at 475 K.
引文
[1]任志锋,刘玮书.热电材料研究的现状与发展趋势[J].西华大学学报(自然科学版),2013,32(3):1-9.
[2]陈俊,袁波,熊守权,等.Zn掺杂对Ge Te合金热电性能的影响[J].西华大学学报(自然科学版),2016,35(6):37-40.
[3]CHEN G,DRESSELHAUS M S,DRESSELHAUS G,et al.Recent developments in thermoelectric materials[J].Int Mater Rev,2003,48(1):45-66.
[4]赵晴,王寅岗.低维Bi2Te3热电材料的制备与性能研究[J].电子元件与材料,2010,29(6):48-51.
[5]高远,曹洪杨.n型碲化铋基材料的制备及其热电性能的研究[J].稀有金属与硬质合金,2017,45(4):62-66.
[6]徐滨士,李长久,刘世参,等.表面工程与热喷涂技术及其发展[J].中国表面工程,1998,38(1):3-9.
[7]周雄.超音速火焰喷涂粉末制备工艺研究[D].武汉:华中科技大学,2008.
[8]VISSER J.Van der waals and other cohesive forces affecting powder fluidization[J].Powder Technology,1989,58(1):1-10.
[9]石彤,KRANTZ M,邵媛媛,等.粉末喷涂工艺中颗粒流动性的测试方法[J].涂料工业,2017,47(7):58-65.
[10]中华人民共和国国家标准金属粉末流动性的测定标准漏斗法(霍尔流速计)[J].粉末冶金技术,1985(2):53-55.
[11]KIM C,KIM C E,BAEK J Y,et al.A novel chemical process of Bi2Se0.3Te2.7nanocompound for effective adjustment in transport properties resulting in remarkable n-type thermoelectric performance[J].Scripta Materialia,2016,119:13-16.
[12]SNYDER G J,TOBERER E S.Complex thermoelectric materials[J].Nature Materials,2008,7(2):105-114.
[13]宋少伟.n型Bi2Te2.7Se0.3热电材料的复合与掺杂研究[D].成都:西华大学,2014.
[14]GOLDSMID H J.Applications of thermoelectricity[M].London:Methuen,1960.
[15]KAJIKAWA T.CRC thermoelectric handbook[M].Boca Raton:CRC Press,2012:45-56.
[2]陈俊,袁波,熊守权,等.Zn掺杂对Ge Te合金热电性能的影响[J].西华大学学报(自然科学版),2016,35(6):37-40.
[3]CHEN G,DRESSELHAUS M S,DRESSELHAUS G,et al.Recent developments in thermoelectric materials[J].Int Mater Rev,2003,48(1):45-66.
[4]赵晴,王寅岗.低维Bi2Te3热电材料的制备与性能研究[J].电子元件与材料,2010,29(6):48-51.
[5]高远,曹洪杨.n型碲化铋基材料的制备及其热电性能的研究[J].稀有金属与硬质合金,2017,45(4):62-66.
[6]徐滨士,李长久,刘世参,等.表面工程与热喷涂技术及其发展[J].中国表面工程,1998,38(1):3-9.
[7]周雄.超音速火焰喷涂粉末制备工艺研究[D].武汉:华中科技大学,2008.
[8]VISSER J.Van der waals and other cohesive forces affecting powder fluidization[J].Powder Technology,1989,58(1):1-10.
[9]石彤,KRANTZ M,邵媛媛,等.粉末喷涂工艺中颗粒流动性的测试方法[J].涂料工业,2017,47(7):58-65.
[10]中华人民共和国国家标准金属粉末流动性的测定标准漏斗法(霍尔流速计)[J].粉末冶金技术,1985(2):53-55.
[11]KIM C,KIM C E,BAEK J Y,et al.A novel chemical process of Bi2Se0.3Te2.7nanocompound for effective adjustment in transport properties resulting in remarkable n-type thermoelectric performance[J].Scripta Materialia,2016,119:13-16.
[12]SNYDER G J,TOBERER E S.Complex thermoelectric materials[J].Nature Materials,2008,7(2):105-114.
[13]宋少伟.n型Bi2Te2.7Se0.3热电材料的复合与掺杂研究[D].成都:西华大学,2014.
[14]GOLDSMID H J.Applications of thermoelectricity[M].London:Methuen,1960.
[15]KAJIKAWA T.CRC thermoelectric handbook[M].Boca Raton:CRC Press,2012:45-56.