本文選題：硅藻土 + 燒成溫度��； 參考：《華南理工大學》2015年碩士論文

【摘要】：室內空氣濕度直接影響著人類的身心健康及物品存放,研究如何將室內濕度維持在一個舒適的范圍具有重要意義。本文主要研究了如何制備一種濕容量高、吸放濕響應快、耐候性好的調濕陶瓷磚。首先,將實驗所用主要原料進行化學成分和物相分析。實驗結果表明:實驗所用黏土化學組成中均含有大量的Fe2O3,其影響磚坯呈色,降低白度。鉀鈉砂、滑石砂中的主要化學成分分別為Si O2、Na2O和Si O2、Mg O。黏土主要由高嶺土和石英組成。鉀鈉砂中以鈉長石礦物為主,這使得由該礦物組成的配方更適用于低溫燒成。其次,探討了原料配比和制備工藝對調濕陶瓷磚吸放濕性能的影響。實驗發(fā)現(xiàn):硅藻土的引入能夠改善材料的吸放濕性能,提高材料的濕容量、吸水率、顯氣孔率等,同時降低材料的容重。當硅藻土添加量為70g時,濕容量、吸水率、顯氣孔率、容重分別達到161.46g/m2、30.59%、42.83%、1.41g/cm3。最終經綜合考慮,確定基礎配方為:硅藻土60g、永和泥7.5g、中山泥7.5g、臺山泥7.5g、水洗泥7.5g、鉀鈉砂15g、滑石砂5g。接著對制備工藝進行正交優(yōu)選,正交試驗結果表明:燒成溫度、球磨時間、保溫時間等制備工藝對調濕陶瓷磚的吸放濕性能有重大影響。顯著順序為:燒成溫度球磨時間保溫時間。經綜合考慮,最佳的工藝參數(shù)為球磨10min、燒成溫度1000℃、保溫30min。接著探討了淀粉、木屑、炭粉三種造孔劑對調濕陶瓷磚吸放濕性能的影響。這些造孔劑的引入會提高材料的吸水率,但濕容量和吸放濕性能并未得到明顯改善。相反,造孔劑燒成后的沉積物會造成微孔的堵塞,導致吸濕性能下降。最后對陶瓷磚進行無機鹽復合,探討無機鹽種類和添加量對陶瓷磚吸放濕性能的影響,并進行環(huán)境調濕模擬應用實驗。結果表明:三種無機鹽(Na Cl、Mg Cl2、Ca Cl2)可連續(xù)、均勻地分散到磚體表面,且均能改善陶瓷磚吸放濕性能。經綜合比較,Ca Cl2復合調濕陶瓷磚的吸放濕性能最優(yōu)。當Ca Cl2復合量為2%時,濕容量達757.27 g/m2,放濕量為466.66 g/m2,抗折強度為14.25MPa。環(huán)境調濕模擬應用實驗表明,經Ca Cl2復合后的調濕陶瓷磚可將空氣濕度維持在40%~70%這一人體感知最舒適的范圍內。
[Abstract]:Indoor air humidity directly affects the physical and mental health of human beings and the storage of goods. It is of great significance to study how to maintain indoor humidity in a comfortable range. In this paper, the preparation of a ceramic tile with high moisture capacity, quick moisture absorption and desorption response and good weathering resistance was studied. Firstly, the chemical composition and phase of the main raw materials used in the experiment were analyzed. The experimental results show that there is a large amount of Fe _ 2O _ 3 in the chemical composition of the clay used in the experiment, which affects the color of the brick and reduces the whiteness of the brick. The main chemical compositions of potassium sodium sand and talc sand are Sio _ 2 Na _ 2O and Sio _ 2 O _ 2 mg _ 2O, respectively. Clay is mainly composed of kaolin and quartz. The albite mineral is the main mineral in potash and sodium sand, which makes the formula of this mineral more suitable for low temperature sintering. Secondly, the effects of raw material ratio and preparation technology on moisture absorption and desorption properties of humidified ceramic tiles were discussed. It is found that the introduction of diatomite can improve the moisture absorption and desorption performance of the material, increase the moisture capacity, water absorption rate and apparent porosity of the material, and reduce the bulk density of the material at the same time. When the amount of diatomite was 70 g, the wet capacity, water absorption, apparent porosity and bulk density were 161.46g / m230.59g / cm ~ (-3) and 42.83g / cm ~ (-3), respectively. After comprehensive consideration, the basic formula was determined as follows: diatomite 60g, yonghe mud 7.5g, Zhongshan mud 7.5g, Taishan mud 7.5g, washing mud 7.5g, potassium sodium sand 15g, talc sand 5g. The orthogonal experimental results show that the sintering temperature, milling time and holding time have a great influence on the moisture absorption and desorption performance of humidified ceramic tiles. The remarkable order is: sintering temperature ball milling time heat preservation time. The optimum technological parameters are ball milling for 10 min, sintering temperature 1000 鈩，

本文編號：1777631