耐高温金红石涂料的制备及性能研究

刘磊, 谭正德, 欧阳宇宁, 肖鑫

doi:10.16577/j.issn.1001-1560.2022.0314

材料保护 >

2022 , Vol. 55 >Issue 11: 97 - 101

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0314

工艺探讨

耐高温金红石涂料的制备及性能研究

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湖南工程学院材料与化工学院

谭正德(1970-)，教授，研究方向为无机纳米材料的合成与光催化应用、功能型涂料的研发，E - mail：tzd0517@hnie.edu.cn

收稿日期: 2022-05-24

修回日期: 2022-06-21

录用日期: 2022-07-20

网络出版日期: 2023-12-26

基金资助

基于改性石墨烯及碳纳米管低成本水性散热涂料技术及规模化生产与推广应用项目(2021GK2013)资助

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Study on Preparation and Properties of High Temperature Resistant Rutile Coatings

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(College of Materials and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411100, China)

Received date: 2022-05-24

Revised date: 2022-06-21

Accepted date: 2022-07-20

Online published: 2023-12-26

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摘要

为拓展金红石的应用并满足市场对耐1 000 ℃以上高温特种涂料的需求，通过正交试验，以涂层的耐温性和热膨胀系数为主要考察指标，优选并确定了耐高温金红石涂料最佳的原料配比与涂装工艺；研究了关键因素对涂层耐高温性能的影响。结果表明：微米级金红石：空心微珠粉末：岩纤维：锆英砂质量比为45∶40∶10∶5，硅酸钠(模数为3)与氟硅酸钾的质量比为20∶1，120 ℃下老化2 h，膜厚120 μm，1 200 ℃下单面焙烧5 min，涂层正反面温差达1 050 ℃，热膨胀系数为1.1×10-6 /℃，满足新能源汽车电池组隔热需求，可应用于火力发电。

关键词： 耐热; 耐高温; 涂层; 热膨胀系数

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刘磊, 谭正德, 欧阳宇宁, 肖鑫 . 耐高温金红石涂料的制备及性能研究[J]. 材料保护, 2022 , 55(11) : 97 -101 . DOI: 10.16577/j.issn.1001-1560.2022.0314

Abstract

For expanding the application of rutile and meeting the market demand for special coatings with high temperature resistance to above 1 000 ℃, the optimal raw material ratio and coating process of high temperature resistant rutile coating were selected and determined through the orthogonal test on the basis of taking the temperature resistance and thermal expansion coefficient of the coating as the main inspection indicators. In addition, the influences of key factors on the high temperature resistance of the coating were studied. Results showed that, under the condition that the mass ratio of micron - level rutile∶hollow microbead powder∶rock fiber∶zircon sand was 45∶40∶10∶5, the mass ratio of sodium Silicate (Module 3)∶potassium fluosilicate was 20∶1, the aging temperature and time were 120 ℃ and 2 h respectively, and the coating thickness was 120 μm, the temperature difference between the two sides of the coating would be 1 050 ℃ after a calcination at 1 200 ℃ on one side for 5 min, and the thermal expansion rate would be 1.1×10-6/℃, indicating that the coating could meet the thermal insulation requirement of the battery pack of new energy vehicles and could be used in thermal power generation.

Key words： heat resistance; high temperature resistance; coating; thermal expansion coefficient

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