The effect of SPS sintering temperatures on the structure, thermoelectric properties, and scattering mechanism of Cu2Se

材料科学 烧结 热电效应 微观结构 散射 声子散射 退火(玻璃) 凝聚态物理 热导率 大气温度范围 分析化学(期刊) 复合材料 热力学 光学 化学 物理 色谱法
作者
Jian Tie,Guiying Xu,Yawei Li,Xi’an Fan,Quanxin Yang,Bohang Nan
出处
期刊:Journal of materials research and technology [Elsevier BV]
卷期号:27: 3506-3516 被引量:3
标识
DOI:10.1016/j.jmrt.2023.10.108
摘要

Cu2Se has recently received much attention due to its excellent thermal and electrical transmission characteristics. In this study, Cu2Se compounds were synthesized by vacuum melt-annealing method and sintered by discharge plasma sintering (SPS) in the 793-1093 K temperature range. The effects of SPS temperatures of 793, 893, 993, and 1093 K on the phase composition, microstructure, band structure, and thermoelectric properties of Cu2Se samples, as well as the test stability of Cu2Se at high temperatures were studied. The results show that the sintering temperature affects the thermoelectric properties, microstructure, and energy band structure of Cu2Se compounds. The samples show many component segregations with nano-micron size and irregular morphology. According to conductance ratio analysis, the primary mechanism of carrier scattering is ionized impurity scattering, consistent with the change of carrier mobility with the test temperature. Combined with the XPS analysis results and defect balance equation, the mechanism of the test temperature depends on carrier concentration, and the carrier scattering mechanism is reasonably explain. The lattice thermal conductivity of Cu2Se materials is relatively low at all sintering temperatures due to nano-micron segregation and the presence of high-mobility Cu ions. Especially at the sintering temperature of 893 K, the segregation of nano-micron components is the most uniform, and the segregation particle size is the smallest, effectively enhancing the phonon scattering and making the lattice thermal conductivity the lowest. At 873 K, the ZT of Cu2Se sintered at 893 K reaches a maximum value of 1.34.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
1秒前
飞行中的鱼完成签到,获得积分20
2秒前
牛牛眉目发布了新的文献求助10
3秒前
菲晗子完成签到,获得积分20
3秒前
茜茜哎科研应助湛湛采纳,获得10
3秒前
zx发布了新的文献求助10
5秒前
6秒前
7秒前
土豪的雪巧完成签到,获得积分10
8秒前
雨的前世完成签到,获得积分10
11秒前
11秒前
Sun发布了新的文献求助10
12秒前
gulllluuuukk完成签到,获得积分10
12秒前
可可西里完成签到,获得积分10
12秒前
13秒前
茜茜哎科研应助傅勃霖采纳,获得10
13秒前
13秒前
Lee发布了新的文献求助10
14秒前
15秒前
15秒前
牛牛眉目发布了新的文献求助10
16秒前
yang发布了新的文献求助10
18秒前
蛋挞完成签到 ,获得积分10
19秒前
李爱国应助zx采纳,获得10
19秒前
bunny完成签到,获得积分20
20秒前
新威宝贝完成签到,获得积分10
22秒前
22秒前
xr完成签到 ,获得积分10
22秒前
张雷应助yangyl采纳,获得10
23秒前
AXEDW完成签到 ,获得积分10
25秒前
csy完成签到,获得积分10
28秒前
顾矜应助黄启烽采纳,获得10
30秒前
ll完成签到 ,获得积分10
30秒前
材袅完成签到,获得积分10
30秒前
31秒前
帆船发布了新的文献求助10
31秒前
柒_l完成签到,获得积分10
31秒前
astral完成签到,获得积分10
31秒前
乐观小之完成签到,获得积分0
34秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
Immigrant Incorporation in East Asian Democracies 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3966366
求助须知:如何正确求助?哪些是违规求助? 3511778
关于积分的说明 11159852
捐赠科研通 3246372
什么是DOI,文献DOI怎么找? 1793416
邀请新用户注册赠送积分活动 874427
科研通“疑难数据库(出版商)”最低求助积分说明 804388