<trans-title xml:lang="en">Microwave Drying of Spontaneous-Coagulation-Cast Wet Alumina Green Body</trans-title>

Wenlong LIU; Jin ZHAO; Juan LIU; Xiaojian MAO; Jian ZHANG; Shiwei WANG

doi:10.15541/jim20220469

Journal of Inorganic Materials, Volume. 38, Issue 4, 461(2023)

Microwave Drying of Spontaneous-Coagulation-Cast Wet Alumina Green Body

Wenlong LIU1...2, Jin ZHAO1,2,*, Juan LIU1,2, Xiaojian MAO1,2, Jian ZHANG1,2, and Shiwei WANG12,* |Show fewer author(s)

¹1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

²2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

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Figures & Tables(10)

$Effects of (a) drying methods and (b) microwave power on the volume fraction of residual water in wet alumina green bodies$

1. Effects of (a) drying methods and (b) microwave power on the volume fraction of residual water in wet alumina green bodies

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2. Effects of (a) drying methods and (b) microwave power on shrinkage behavior of wet alumina green bodies

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3. Effect of microwave power on the surface temperature of wet alumina green bodies

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4. Photos of alumina green bodies dried by (a, e) conventional drying and microwave drying ((b, f) 250 W, (c, g) 400 W, and (d, h) 550 W)

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5. Effects of (a) drying methods and (b) microwave power on pore-size distribution of alumina green bodies

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6. Fracture surfaces of alumina green bodies(a) Microwave drying (250 W); (b) Conventional drying

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7. Moisture distributions of wet alumina green bodies in the drying process(a) Conventional drying for 0, 2, 4, 8, and 15 h; (b) 250-W microwave drying for 0, 0.3, 0.6, 1.2, and 2 h

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8. Effect of drying methods on flexural strength of alumina green bodies and ceramics

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Table 1.
CRP and residual water (after CRP and drying) of samples

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Table 1.
CRP and residual water (after CRP and drying) of samples

Drying method	Microwave power/W	CRP/h	Residual water after CRP/% (in vol.)	Residual water after drying/% (in vol.)
Conventional	—	10	(20.4±1.5)	0.8
Microwave	250	1.8	(11.2±1.4)	0.6
	400	1.3	(9.4±1.4)	0.5
	550	1.0	(7.7±0.7)	0.4

Table 2.
Shrinkage stop time and shrinkage of samples
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Table 2.
Shrinkage stop time and shrinkage of samples
Drying method Microwave power/W Shrinkage stop time/h Shrinkage/%
Conventional — 6.0 (4.9±0.1)
Microwave 250 1.0 (5.2±0.1)
400 0.7 (5.1±0.1)
550 0.5 (4.8±0.1)

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Wenlong LIU, Jin ZHAO, Juan LIU, Xiaojian MAO, Jian ZHANG, Shiwei WANG. Microwave Drying of Spontaneous-Coagulation-Cast Wet Alumina Green Body[J]. Journal of Inorganic Materials, 2023, 38(4): 461

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