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Preparation and Mechanism of Vermiculite with High Expansion Rate
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Yanyan XIE1, 2, Hongjuan SUN1, 2, 3, Tongjiang PENG1, 2, 3, 4, Liming LUO1, 2, Jingfei TIAN1, 2, Yating QIN1, 2
Journal of the Chinese Ceramic Society | 2020, 48(1) : 112 - 119
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Journal of the Chinese Ceramic Society | 2020, 48(1): 112-119
Preparation and Mechanism of Vermiculite with High Expansion Rate
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Yanyan XIE1, 2, Hongjuan SUN1, 2, 3, Tongjiang PENG1, 2, 3, 4, Liming LUO1, 2, Jingfei TIAN1, 2, Yating QIN1, 2
Affiliations
  • 1.Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
  • 2.Institute of Mineral Materials and Applications, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
  • 3.Sichuan Engineering Lab of Nonmetallic Mineral Powder Modification & High-quality Utilization, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
  • 4.Center of Forecasting and Analysis, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China

    • XIE Yanyan (1994-), male, Master candidate. E-mail:

About Author:

XIE Yanyan (1994-), male, Master candidate. E-mail:

Published: 2020-01-20 doi: 10.14062/j.issn.0454-5648.20190291
Outline
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In order to improve the utilization efficiency of vermiculite mineral resources and expand the added value of expanded vermiculite products, an high expansion rate expanded vermiculite (HEV) with was prepared by a chemical treatment-baking heating method with industrial vermiculite from Xinjiang as a raw material. The structure and morphology, optimal preparation process and expansion mechanism of HEV were investigated. The results show that the expansion rate of the HEV is approximately 70 times greater than that of the expanded vermiculite prepared by conventional methods. The preparation mechanism of HEV is related to the mosaic structure of phlogopite, hydrophlogopite and vermiculite in the raw material. This structure can form massive cavities in the industrial vermiculite layer, effectively hindering the escape of internal gas. As a result, the industrial vermiculite has a better thermal expansion performance. The preparation method can improve the application efficiency of industrial vermiculite resource and reduce the production cost. The HEV can be used as a low-cost precursor for vermiculite nanomaterials.

oxalic acid  /  hydrogen peroxide  /  industrial vermiculite  /  high expansion rate  /  mosaic structure
解颜岩, 孙红娟, 彭同江, 罗利明, 田景斐, 秦亚婷. 蛭石的高膨胀倍数制备工艺与机理. 硅酸盐学报, 2020 , 48 (1) : 112 -119 . DOI: 10.14062/j.issn.0454-5648.20190291
Yanyan XIE, Hongjuan SUN, Tongjiang PENG, Liming LUO, Jingfei TIAN, Yating QIN. Preparation and Mechanism of Vermiculite with High Expansion Rate[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (1) : 112 -119 . DOI: 10.14062/j.issn.0454-5648.20190291
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Year 2020 volume 48 Issue 1
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Article Info
doi: 10.14062/j.issn.0454-5648.20190291
  • Receive Date：2019-05-07
  • Online Date：2026-10-29
  • Published：2020-01-20
Article Data
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History
  • Received：2019-05-07
  • Revised：2019-06-27
Funding
Affiliations
    1.Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
    2.Institute of Mineral Materials and Applications, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
    3.Sichuan Engineering Lab of Nonmetallic Mineral Powder Modification & High-quality Utilization, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
    4.Center of Forecasting and Analysis, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China

Corresponding:

SUN Hongjuan (1976-), female, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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