Preparation of ZrO2 Porous Fiber by Electrospinning and Its Thermal Conductivity
KANG Jian1,2, CUI Shuai1,2, WEI Hengyong1,2, BU Jinglong1,2, CUI Yi1,2, LI Hui1,2, YANG Liu1,2, LUO Jing1,2, JI Wenling1,2
1 College of Material Science and Engineering, North China University of Science and Technology, Tangshan 063210 2 Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, Tangshan 063210
Abstract: In this paper, ZrOCl2·8H2O and Y2O3·6H2O were used as raw material and stabilizer, respectively. Polyvinylpyrrolidone (PVP) and ethanol were used as spinning aid and solvent, respectively. The ZrO2 porous fiber was obtained after the electrospinning precursor fibers were calcined at high temperature. The phase and morphology of fibers were characterized by XRD, FTIR, SRS and SEM, and the thermal conductivity of the fibers was also measured. The results showed that the precursor fiber transformed into t-ZrO2 fiber at 800 ℃, and the diameter was about 180 nm. Besides that, some pore structure appeared in the fibers, and their BET specific surface area was 15.36 m2/g, and the average pore diameter was 8 nm. The ZrO2 crystal in the fiber further developed and the fiber diameter became 270 nm when the calcination temperature increased to 1 000 ℃. In addition, some pore structure still existed in the fiber with the specific surface area of 13.22 m2/g and average pore diameter of 9 nm. However, when the calcination temperature is 1 200 ℃, the pores disappeared and the grain sintered in fibers. As a result, the thermal conductivity of the fiber calcined at 800 ℃, 1 000 ℃, 1 200 ℃ increased, and the values were 0.092 9 W/(m·K), 0.095 1 W/(m·K) and 0.106 8 W/(m·K), respectively.
康剑, 崔帅, 魏恒勇, 卜景龙, 崔燚, 李慧, 杨柳, 罗婧, 季文玲. 电纺制备ZrO2多孔纤维及其导热性能[J]. 材料导报, 2019, 33(20): 3396-3400.
KANG Jian, CUI Shuai, WEI Hengyong, BU Jinglong, CUI Yi, LI Hui, YANG Liu, LUO Jing, JI Wenling. Preparation of ZrO2 Porous Fiber by Electrospinning and Its Thermal Conductivity. Materials Reports, 2019, 33(20): 3396-3400.
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2019, Vol. 33 
