Title:
INORGANIC MICROCRYSTALLINE ELECTRET MATERIAL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/082301
Kind Code:
A1
Abstract:
The invention belongs to the technical field of electret materials, and specifically relates to an inorganic microcrystalline electret material and a preparation method therefor. The inorganic microcrystalline electret material is prepared from the following raw materials in percentages by weight: 35-45% of silicon dioxide, 15-25% of zinc oxide, 15-25% of diboron trioxide, and 10-15% of magnesium oxide, with the balance being a performance modifier. The preparation method comprises: selecting and mixing silicon dioxide, zinc oxide, diboron trioxide and magnesium oxide, and melting same at a high temperature to prepare a composite powder material, which realizes multi-component compounding, and has a microcrystalline structure, a single and stable energy trap mechanism, and a symmetrical positive and negative charge retaining property; and preparing the composite powder material and natural wax or rosin in a molten state into a sol body, which is more convenient for coating a polished surface of monocrystalline silicon, and then selecting a specific heating rate and a heating stage value to enable the inorganic microcrystalline electret material to have a relatively high dielectric constant.
Inventors:
HUANG ZHIQIANG (CN)
Application Number:
PCT/CN2021/131416
Publication Date:
May 19, 2023
Filing Date:
November 18, 2021
Export Citation:
Assignee:
CHANGZHOU JINGQI NEW MATERIAL TECH CO LTD (CN)
International Classes:
H01G7/02
Foreign References:
| CN101071683A | 2007-11-14 | |||
| JPH09283373A | 1997-10-31 |
Other References:
HUANG ZHIQIANG; MA XUE-RAO; GU YU-JI: "Preparation and Study of a Novel Microcrystalline Electret Composite: SiO2-Ta2O5-B2O3-RO", JOURNAL OF FUNCTIONALMATERIALS AND DEVICES, vol. 25, no. 2, 30 June 2019 (2019-06-30), CN , pages 124 - 129, XP009546377, ISSN: 1007-4252
HUANG ZHIQIANG, MA XUETAO, GU YUJIE : "Comparison and study of three kinds of SiO 2 based inorganic electret materials: STBR, SPAP and SiO 2 film", JOURNAL OF FUNCTIONAL MATERIALS, vol. 51, no. 2, 1 January 2020 (2020-01-01), pages 2137 - 2143, XP093067238, DOI: 10.3969/j.issn.1001-9731.2020.02.022
HUANG ZHIQIANG;, XU ZHENG; FANG MINGBAO; YU JIANQUN: "B3+, Zn2+ Doping and Modification of SiO2 Thin Film Electret", CHINESE JOURNAL OF MATERIALS RESEARCH, vol. 14, no. 4, 1 August 2000 (2000-08-01), XP093067248
HUANG ZHIQIANG, MA XUETAO, GU YUJIE : "Comparison and study of three kinds of SiO 2 based inorganic electret materials: STBR, SPAP and SiO 2 film", JOURNAL OF FUNCTIONAL MATERIALS, vol. 51, no. 2, 1 January 2020 (2020-01-01), pages 2137 - 2143, XP093067238, DOI: 10.3969/j.issn.1001-9731.2020.02.022
HUANG ZHIQIANG;, XU ZHENG; FANG MINGBAO; YU JIANQUN: "B3+, Zn2+ Doping and Modification of SiO2 Thin Film Electret", CHINESE JOURNAL OF MATERIALS RESEARCH, vol. 14, no. 4, 1 August 2000 (2000-08-01), XP093067248
Attorney, Agent or Firm:
NANTONG YUNCHUANGHUIQUAN PATENT AGENCY (CN)
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