摘要
为推动铯钨青铜(Cs_(x)WO_(3))的工业化生产和广泛应用,以碳酸铯、三氧化钨为原料,采用固体草酸热解产生的CO作为还原气体,通过固相反应法制备具有高效近红外屏蔽性能的Cs_(x)WO_(3)粉体,探究了还原反应温度对Cs_(x)WO_(3)粒子结构与性能的影响,并从Lambert-Beer定律出发,提出了新的且更合理的透明隔热指数,以表征评价Cs_(x)WO_(3)薄膜的近红外屏蔽性能。结果表明,在710℃所合成的Cs_(x)WO_(3)-710粒子结晶度最好,制备的Cs_(x)WO_(3)-PVA复合薄膜具有最佳的近红外屏蔽性能,且具有低雾度和高透明特点。而且,在690℃及CO还原下,以CsCl为铯源能够获得Cl掺杂的Cs_(x)WO_(3-y)Cly粒子,Cl掺杂能够进一步提高W5+/W6+比例和近红外屏蔽性能。当可见光最高透过率为70%时,Cs_(x)WO_(3)-710和Cs_(x)WO_(3-y)Cly薄膜样品在1500 nm的近红外屏蔽率分别达到96.59%和98.35%,透明隔热指数K分别为4.35和5.20。模拟隔热测试结果表明,红外灯辐照下,与空白玻璃相比,安装Cs_(x)WO_(3)-710薄膜和Cs_(x)WO_(3-y)Cly薄膜玻璃的隔热箱内部空气温度分别有效降低15.5℃和17.8℃;自然阳光辐照下,连续9 d的测试结果表明,与空白对照组相比,Cs_(x)WO_(3-y)Cly薄膜玻璃的隔热箱内部温度降低5.1~11℃。
In order to promote the industrial production and widespread application of cesium-tungsten bronze(Cs_(x)WO_(3)),Cs_(x)WO_(3) powders with high efficient near-infrared shielding performance were prepared by solid phase reaction method using cesium carbonate,tungsten trioxide as raw materials and using CO generated from solid oxalic acid pyrolysis as a reducing gas.The effect of reduction reaction temperature on the structure and properties of Cs_(x)WO_(3) particles was investigated.Based on Lambert-Beer law,a new and more reasonable transparent thermal insulation index was proposed to characterize and evaluate the near-infrared shielding performance of Cs_(x)WO_(3) films.The results showed that the Cs_(x)WO_(3)-710 particles synthesized at 710℃exhibited the best crystallinity,and the as-prepared Cs_(x)WO_(3)-PVA composite film exhibited the best near-infrared shielding ability,with low haze and high transparency.Moreover,Cl-doped Cs_(x)WO_(3-y)Cly particles can be synthesized by using CsCl as cesium source at 690℃and CO reduction.Cl doping is beneficial for further improving the W5+/W6+ratio and near-infrared shielding performance.When the maximum transmittance of visible light was 70%,the near-infrared shielding rate of Cs_(x)WO_(3)-710 and Cs_(x)WO_(3-y)Cly film samples at 1500 nm reached 96.59%and 98.35%,and the transparent heat insulation index K attained to 4.35 and 5.20,respectively.The simulated insulation test results show that under infrared lamp irradiation,compared with blank glass,the internal temperature of the insulation box installed with Cs_(x)WO_(3)-710 thin film and Cs_(x)WO_(3-y)Cly thin film glass can be effectively reduced by 15.5℃and 17.8℃,respectively.Under natural sunlight irradiation,the results of continuous testing for 9 days showed that the internal temperature of the insulation box with Cs_(x)WO_(3-y)Cly thin film glass decreased by 5.1—11℃compared with the blank control group.
作者
李艺
刘敬肖
史非
杨大毅
田紫薇
王美玉
万佳翔
陈超凡
吕振杰
LI Yi;LIU Jingxiao;SHI Fei;YANG Dayi;TIAN Ziwei;WANG Meiyu;WAN Jiaxiang;CHEN Chaofan;LYU Zhenjie(College of Textile and Material Engineering,Dalian Polytechnic University,Dalian 116034,Liaoning,China)
出处
《材料导报》
北大核心
2025年第7期46-53,共8页
Materials Reports
基金
国家自然科学基金(51778098)
辽宁省教育厅高校基本科研项目(LJKMZ20220887)
大连市科技创新基金计划(2018J12SN066)。
关键词
铯钨青铜
固相合成
近红外屏蔽
节能窗
CO还原
透明隔热指数
cesium tungsten bronze
solid-phase synthesis
near infrared shielding
energy-saving window
CO reduction
transparent thermal insulation index
作者简介
李艺,大连工业大学材料与化工专业硕士研究生,在刘敬肖教授的指导下进行研究,主要研究方向为无机功能材料与技术,研究领域为功能粒子合成及节能窗口材料。;通讯作者:刘敬肖,大连工业大学教授、硕士研究生导师。主要研究方向包括红外线遮蔽和节能窗材料、生态环境友好材料、介孔气凝胶材料、特种玻璃与陶瓷及功能复合材料(含生物医用材料)等。drliu-shi@dlpu.edu.cn。
