本文關(guān)鍵詞： 納米材料 化學(xué)共沉淀法 La-Yb共摻雜 LaxYbySn(1-x-y)O2 摻雜二氧化錫 隔熱涂層　出處：《深圳大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：現(xiàn)代建筑廣泛采用大面積玻璃窗及豪華氣派的玻璃幕墻,采暖和制冷造成很大的能源消耗,同時(shí)也帶來了“光污染”,影響了人們的生活。近年來,越來越多的人開始重視“綠色環(huán)保,節(jié)能減排”。目前主要通過鍍膜和貼膜來達(dá)到建筑玻璃門窗、車窗隔熱和節(jié)能減排的目的,但是效果不太理想,且成本較高,使用壽命短。一種以摻雜二氧化錫為代表的新型的無機(jī)-有機(jī)復(fù)合的多組分材料慢慢被廣泛應(yīng)用于隔熱玻璃涂料。本文的研究?jī)?nèi)容主要是:通過摻雜元素鑭和鐿來改變二氧化錫在不同波長(zhǎng)區(qū)域的光學(xué)性能,希望能獲得既能滿足可見光透過率,同時(shí)具有良好阻隔近紅外線的隔熱涂料。以La Cl3·7H2O、Yb(NO3)3·6H2O、Sn Cl4·5H2O為原料,氨水為沉淀劑,PEG-600作分散劑,采用化學(xué)共沉淀法制備了鑭鐿共摻雜二氧化錫納米粉體。考察了反應(yīng)溫度、反應(yīng)時(shí)間、反應(yīng)p H值、煅燒溫度、煅燒時(shí)間、鑭和鐿的摻雜量等因素的影響,運(yùn)用差熱-熱重分析(TG-DTA),X射線衍射儀(XRD)、掃描電鏡(SEM)等儀器對(duì)粉體的結(jié)構(gòu)、形貌及納米化程度等進(jìn)行表征。優(yōu)化得到共沉淀法制備鑭鐿共摻雜二氧化錫納米粉體的最佳工藝條件如下:反應(yīng)溫度為60℃,反應(yīng)時(shí)間為3h,PEG-600為分散劑,滴定終點(diǎn)p H值為9,鑭的摻雜量x=0.05,鐿的摻雜量y=0.1,煅燒溫度為800℃,煅燒保溫時(shí)間為3h。分析測(cè)試結(jié)果表明,鑭和鐿的摻雜沒有改變二氧化錫的物相,仍為四方相金紅石結(jié)構(gòu),粉體呈球形,顆粒大小和分布都較均勻,平均粒徑在40nm左右,分散性良好,只有輕微團(tuán)聚現(xiàn)象。通過機(jī)械研磨-超聲分散法制備La0.05Yb0.1Sn0.85O2漿料,通過沉降實(shí)驗(yàn)討論了分散介質(zhì)、硅烷偶聯(lián)劑的種類、分散劑的種類及含量等因素對(duì)漿料穩(wěn)定性的影響。實(shí)驗(yàn)結(jié)果表明:當(dāng)超聲分散時(shí)間為20min,用去離子水為分散介質(zhì),KH560為硅烷偶聯(lián)劑、3%的CTAB為分散劑,p H為6時(shí),所制備的La0.05Yb0.1Sn0.85O2漿料的分散穩(wěn)定性最好,沉降速率最慢,一周時(shí)間內(nèi)漿料只沉降了4%左右;超聲波處理對(duì)漿料的分散性影響很大,SEM、TEM測(cè)試結(jié)果表明,漿料中納米顆粒分散均勻,粒徑大小均勻,粒徑在20nm左右,只有較少團(tuán)聚現(xiàn)象。最后,用水性丙烯酸樹脂和La0.05Yb0.1Sn0.85O2漿料通過共混法制得隔熱涂料,然后涂覆在載玻片基底上制得隔熱涂層,并對(duì)涂層進(jìn)行了紫外-可見-近紅外光譜及物理性能的測(cè)試表征,討論了鑭和鐿的摻雜量、不同漿料用量及涂層厚度等對(duì)紫外可見近紅外光透過率的影響。實(shí)驗(yàn)結(jié)果表明:當(dāng)鑭的摻雜量x=0.05、鐿的摻雜量y=0.1,漿料用量為35%,涂層厚度為3層時(shí),涂層的隔熱性能最佳,紅外阻隔率達(dá)到80%-90%,且對(duì)可見過的透過率在80%以上,達(dá)到了建筑涂膜隔熱玻璃標(biāo)準(zhǔn)(GB/T 29501-2013);涂層的硬度為3H,附著力為1級(jí),耐水性良好(浸泡24h無起泡)。
[Abstract]:Large area glass windows and luxurious glass curtain wall are widely used in modern buildings. Heating and cooling cause a great deal of energy consumption, but also bring "light pollution", which has affected people's lives in recent years. More and more people begin to pay attention to "green environmental protection, energy conservation and emission reduction". At present, mainly through coating and film to achieve the purpose of building glass doors and windows, car windows insulation and energy conservation, but the effect is not very good. And the cost is high. A new type of inorganic-organic composite multicomponent material, represented by doped tin dioxide, has been widely used in insulating glass coatings. The main contents of this paper are as follows:. By doping lanthanum and ytterbium, the optical properties of tin dioxide in different wavelength regions were changed. It is hoped that the thermal insulation coating can satisfy the visible light transmittance and have a good barrier to near infrared ray. La Cl3 路7H _ 2O _ 3 路6H _ 2O is used in this paper. Sn Cl4 路5H 2O was used as raw material and ammonia water as precipitator PEG-600 as dispersant. Lanthanum and ytterbium co-doped tin dioxide nano-powders were prepared by chemical co-precipitation method. The reaction temperature was investigated. The factors such as reaction time, pH value, calcination temperature, calcination time, doping amount of lanthanum and ytterbium were studied by differential thermogravimetric analysis (TG-DTAC) X-ray diffractometer (XRD). Scanning electron microscopy (SEM) and other instruments on the structure of the powder. The optimum conditions for preparing lanthanum ytterbium co-doped tin dioxide nanoparticles by co-precipitation were obtained as follows: reaction temperature 60 鈩，

本文編號(hào)：1470920