铝酸镧基低膨胀高发射率红外辐射涂料的制备与性能
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摘要
为了延长工业炉壁面涂层使用寿命,降低热膨胀系数,提高红外发射率,用溶胶凝胶法制备了镍离子掺杂的铝酸镧纯相粉料,然后与铁钴尖晶石以x(尖晶石)+(1-x)LANO的组合进行混合,混合粉料最后与辅料以一定比例相结合,制备出了低膨胀系数、高发射率的红外辐射涂料。热震试验表明,涂层经过50次热震之后,仍无明显破损,抗热震性能良好。并且根据热震之后涂层发射率的高低,选择出了优化配方,确定了混合基料与辅料之间的最佳比例。
In order to prolong the service life of industrial furnace wall coating, reduce the thermal expansion coefficient and increase the infrared emissivity, a nickel ion-doped strontium aluminate pure phase powder was prepared by sol-gel method. Then, it is mixed with iron-cobalt spinel in the combination of x(spinel)+(1-x) LANO, and the mixed powder is finally combined with the auxiliary materials in a certain ratio to prepare infrared with low expansion coefficient and Infrared radiation coating with high emissivity.The thermal shock test showed that after 50 thermal shocks, the coating showed no obvious damage and good thermal shock resistance. And according to the level of coating emissivity after thermal shock, the optimized formula was selected to determine the optimal ratio between the mixed base material and the auxiliary material.
In order to prolong the service life of industrial furnace wall coating, reduce the thermal expansion coefficient and increase the infrared emissivity, a nickel ion-doped strontium aluminate pure phase powder was prepared by sol-gel method. Then, it is mixed with iron-cobalt spinel in the combination of x(spinel)+(1-x) LANO, and the mixed powder is finally combined with the auxiliary materials in a certain ratio to prepare infrared with low expansion coefficient and Infrared radiation coating with high emissivity.The thermal shock test showed that after 50 thermal shocks, the coating showed no obvious damage and good thermal shock resistance. And according to the level of coating emissivity after thermal shock, the optimized formula was selected to determine the optimal ratio between the mixed base material and the auxiliary material.
引文
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[9]ISLAM M N,ARAKI W,ARAI Y.Mechanical behavior of ferroelastic LaAlO3[J].Journal of the European Ceramic Society,2017,37(4):1665-1671.
[10]ROBERT I,ELIZA M,RADU L,et al.One-step synthesis of near-infrared reflective brown pigments based on iron-doped lanthanum aluminate,LaAl1-xFexO3[J].Dyes and Pigments,2018(152):105-111.
[11]Kaur J,Singh D,Dubey V,et al.Review of the synthesis,characterization,and properties of LaAlO3phosphors[J].Research on Chemical Intermediates,2014,40(8):2737-2771.
[2]卢卫华.铝酸镧基红外辐射涂层的制备与性能研究[D].安徽:安徽工业大学,2017.
[3]钱雪,徐国跃,谭淑娟,等.3~5μm波段耐高温低发射率涂层抗热震性能研究[J].南京航空航天大学学报,2016,48(1):48-52.
[4]沈国良,张晓辰,李银苹,等.金属乙二醇盐合成工艺的研究[J].化学世界,2011,52(1):49-52,56.
[5]杨南如,余桂郁.溶胶-凝胶法简介第一讲-溶胶-凝胶法的基本原理与过程[J].硅酸盐通报,1993(2):56-63.
[6]王阳,白皓,张文远,等.粒度对尖晶石基高发射率涂层性能的影响[J].工业炉,2016,38(4):1-5.
[7]罗伍文.溶胶-凝胶法简介第二讲-用于溶胶-凝胶法的主要原料-金属醇盐[J].硅酸盐通报,1993(4):60-68.
[8]WILSON H M,JUAN S R,JUAN M S,et al.Synthesis of lanthanum aluminate by reverse chemical precipitation using pseudoboehmite as alumina precursor[J].Applied Radiation and Isotopes Including Data Instrumentation and Methods for Use in Agriculture Industry and Medicine,2016(117):96-99..
[9]ISLAM M N,ARAKI W,ARAI Y.Mechanical behavior of ferroelastic LaAlO3[J].Journal of the European Ceramic Society,2017,37(4):1665-1671.
[10]ROBERT I,ELIZA M,RADU L,et al.One-step synthesis of near-infrared reflective brown pigments based on iron-doped lanthanum aluminate,LaAl1-xFexO3[J].Dyes and Pigments,2018(152):105-111.
[11]Kaur J,Singh D,Dubey V,et al.Review of the synthesis,characterization,and properties of LaAlO3phosphors[J].Research on Chemical Intermediates,2014,40(8):2737-2771.