| 王治聪,解文圣,李爱民.碳酸钙为发泡剂的粉煤灰发泡陶瓷制备[J].,2024,64(2):118-126 |
| 碳酸钙为发泡剂的粉煤灰发泡陶瓷制备 |
| Preparation of coal fly ash foamed ceramic using calcium carbonate as foaming agent |
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| DOI：10.7511/dllgxb202402002 |
| 中文关键词: 粉煤灰 发泡陶瓷 碳酸钙 高温发泡 烧结温度 孔结构 |
| 英文关键词: coal fly ash foamed ceramic calcium carbonate high temperature foaming sintering temperature pore structure |
| 基金项目:国家科技重大专项资助项目(2018ZX07601-004). |
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| 摘要点击次数: 160 |
| 全文下载次数: 162 |
| 中文摘要: |
| 发泡陶瓷作为一种新型建筑墙体材料，具有轻质保温的特性．以粉煤灰为主要原料，分别添加碳酸钙、四硼酸钠作为发泡剂和助熔剂，通过球磨、压片、烧制等工艺实现了一种新型发泡陶瓷的制备，同时研究了烧结温度、发泡剂掺量、粉煤灰添加量以及粉料粒度对发泡效果的影响．结果表明，样品平均孔径会随发泡剂掺量增加而增大；随烧结温度升高，样品的表观密度先下降后上升，孔隙率与之呈相反趋势，平均孔径会逐渐升高；样品的表观密度和孔隙率随粉料粒度的降低而降低，抗压强度则会提升．研究表明，在发泡剂掺量为1%、烧结温度为750 ℃、保温时间为15 min的工艺下可制得表观密度为0.156 g/cm3、孔隙率为93%、抗压强度为2.23 MPa的发泡陶瓷． |
| 英文摘要: |
| As a new type of building wall material, foamed ceramic has the characteristics of light weight and heat preservation. Using coal fly ash as the raw material, adding calcium carbonate and sodium tetraborate as foaming agent and flux agent respectively, a new kind of foamed ceramic is prepared by ball milling, pressing, firing and other processes. At the same time, the effects of sintering temperature, foaming agent content, coal fly ash addition and powder particle size on foaming effect are studied. The results show that the average pore size of the sample increases with the increase of foaming agent content. With the increase of sintering temperature, the apparent density of the sample decreases first and then increases, while the porosity shows an opposite trend, and the average pore size increases gradually. The apparent density and porosity of the sample decrease with the decrease of powder particle size, while the compressive strength increases. The study shows that the foamed ceramic with an apparent density of 0.156 g/cm3, a porosity of 93% and a compressive strength of 2.23 MPa is prepared under the conditions of foaming agent content of 1%, sintering temperature of 750 ℃ and holding time of 15 min. |
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