Effect of annealing temperature on the crystallography, particle size and thermopower of bulk ZnO

详细信息    查看全文

• 作者：Urai Seetawan^a ; Suwit Jugsujinda^a ; Tosawat Seetawan^a ; ^{t_seetawan@snru.ac.th"" rel=""nofollow} ; Chanipat Euvananont^b ; Chabaipon Junin^b ; Chanchana Thanachayanont^b ; Prasarn Chainaronk^c ; Vittaya Amornkitbamrung^d
• 关键词：Nanoparticles of ZnO ; Bulk ZnO ; Annealing temperature ; Crystal structure of ZnO ; Thermopower of ZnO
• 刊名：Solid State Sciences
• 出版年：2011
• 出版时间：August 2011
• 年：2011
• 卷：13
• 期：8
• 页码：1599-1603
• 全文大小：1266 K

文摘

The precursor of nanopowder ZnO was synthesized by direct precipitation method and compacted to bulk samples. The bulk ZnO was annealed by furnace at temperature range of 400–650 °C in air for 30 min. The crystallography of precursor and bulk powder of ZnO was analyzed by the X-ray diffraction (XRD) and scanning electron microscopy (SEM) and obtained the hexagonal crystal structure, mean lattice parameters of a = b = 3.2478 Å and c = 5.2037 Å and unit cell volume of 47.53 Å³. The particle size was investigated by SEM and evaluated by XRD results about 76.28 nm and bulk density of 3494.14 kg m⁻³. The thermopower was measured by steady state method and obtained highest value of −92.99 μV K⁻¹ at room temperature for annealing temperature of 550 °C.