CN110498673A - 一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法 - Google Patents
一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法 Download PDFInfo
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000000919 ceramic Substances 0.000 title claims abstract description 51
- 239000013078 crystal Substances 0.000 title claims abstract description 34
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052863 mullite Inorganic materials 0.000 title claims abstract description 34
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000000465 moulding Methods 0.000 claims abstract description 14
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims abstract description 10
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims abstract description 10
- 229920002472 Starch Polymers 0.000 claims abstract description 10
- 239000008107 starch Substances 0.000 claims abstract description 10
- 235000019698 starch Nutrition 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims abstract description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
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- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 2
- 238000003682 fluorination reaction Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 abstract description 3
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 2
- 239000011449 brick Substances 0.000 description 9
- 239000007767 bonding agent Substances 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 241000790917 Dioxys <bee> Species 0.000 description 3
- 229910003978 SiClx Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
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- 230000035939 shock Effects 0.000 description 2
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- 238000005452 bending Methods 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
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- 238000009770 conventional sintering Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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Abstract
本发明专利涉及一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法，包括以下步骤：将氧化铝空心球、氧化铝细粉、二氧化硅微粉、氟化铝、淀粉和水，置于混炼机中混炼，得到混炼后的泥料；将混炼均匀的泥料放入模具中进行成型浇注，待样品在模具中养护后脱模，形成氧化铝空心球多孔陶瓷坯体；将脱模后的多孔陶瓷坯体干燥；将干燥后的多孔陶瓷坯体高温中煅烧2‑6小时，随炉自然冷却后取出，即得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷。本发明制备的莫来石晶须增强的氧化铝空心球多孔陶瓷，由资源丰富的Al2O3、SiO2质原料制备，成本低廉；将莫来石晶须引入多孔陶瓷材料可提高材料的韧性、增加冲击强度，有利于提高材料的使用寿命。
Description
技术领域
本发明涉及无机化工技术领域，具体涉及一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法。
背景技术
随着现代科技的发展，特别是冶金、化工、汽车工业、环保和能源等领域的发展，对材料的要求越来越苛刻，迫切需要开发一种新型的高性能结构材料。能源日益紧张，环保日趋严格，保温材料作为高温工业不可缺少的一部分，对其一些关键的性能如热导率低，耐火度高，高温使用体积稳定性好，抗热震性能好等又提出了新的要求，以满足轻质结构高温窑炉的需求。国内市场上通过烧失法或发泡法制备的轻质高铝砖，轻质莫来石砖，轻质粘土砖，轻质硅砖等，已经广泛应用于工业窑炉的背衬层和隔热层。但是应用于高温或者超高温工业窑炉的工作面砖主要为氧化铝空心球砖，氧化铝空心球砖以氧化铝空心球为骨料，通过刚玉相结合和莫来石相结合制备氧化铝空心球砖。该砖的特点是体积密度相对较高，气孔率较低，导热系数相对较大，于降低窑炉重量，节能降耗不利。并且由于采用传统烧结颈部结合氧化铝空心球，造成试样的强度较低。本发明针对现有的技术不足，提供了一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法。
发明内容
本发明提供了一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法，以氧化铝空心球、氧化铝微粉和二氧化硅微粉为原料，以氟化铝作为催化剂，淀粉作为结合剂及造孔剂，经混炼、成型、干燥、烧成，得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷。在较低的温度下烧成，并在空心球之间形成莫来石晶须网络骨架，进一步增强了氧化铝多孔陶瓷的抗弯强度，从而得到高强度、高气孔率的氧化铝空心球多孔陶瓷。
为实现上述目的，本发明通过以下技术方案实现：
一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法，其特征在于，以重量份计，物料组成为：63-72份粒径为3-0.074mm的氧化铝空心球为主要原料，15-25份粒径小于0.074mm的氧化铝细粉、8-15份粒径小于0.045mm的二氧化硅微粉为基质，4-8份粒径小于0.074mm的氟化铝为催化剂，经混炼、成型、干燥、烧成，得到具有莫来石晶须增强氧化铝空心球多孔陶瓷，其具体操作步骤如下：
步骤一，将上述氧化铝空心球置于混炼机中，外加以上述物料总重量5-8%的水和4-10%的淀粉，以150-200r/min转速混炼10-20分钟；再加入上述氧化铝细粉、二氧化硅微粉、氟化铝细粉，以150-200r/min转速继续混炼10-20分钟，得到混炼后的浇注料；
步骤二，将混炼后的浇注料放入模具中进行成型浇注，待样品在模具中养护24-48小时后脱模，形成多孔陶瓷坯体；
步骤三，将脱模后的多孔陶瓷坯体于110℃的条件下干燥24-48小时；
步骤四，将干燥后的多孔陶瓷坯体升温至1350-1550℃，煅烧2-6小时，随炉自然冷却后取出，即得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷。
所述步骤四中优选的煅烧时间为3-5小时。
所述步骤四中升温速率为1-5℃/min。
与现有技术相比，本发明的有益效果是：1）本发明制备的莫来石晶须增强的氧化铝空心球多孔陶瓷，由资源丰富的Al2O3、SiO2质原料制备，成本低廉；2）莫来石晶须具有优良的耐高温、耐腐蚀、优越的热震稳定性和力学性能，将其引入多孔陶瓷材料可提高材料的韧性、增加冲击强度，有利于提高材料的使用寿命。3）晶须可以对砖体起到增韧的作用，晶须的长径比过大增韧效果较差，长径比过小则生成物不能成为晶须，称作晶粒，长径比为10~61之间增强效果最好。
附图说明
附图说明
图1为本发明的工艺流程示意图。
具体实施方式
下面结合实施例对本发明的制备方法做进一步说明：
实施例1：
本实施例给出的莫来石晶须增强的氧化铝空心球多孔陶瓷，物料组成为：粒径为3-0.1mm的氧化铝空心球70kg、粒径小于0.074mm的氧化铝细粉19kg、粒径小于0.045mm的二氧化硅微粉9.2kg、粒径小于0.074mm的氟化铝细粉1.8kg。以淀粉为结合剂和造孔剂，通过混炼、成型、干燥和烧成，得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷，具体操作步骤如下：
步骤一，将上述氧化铝空心球置于混炼机中，外加以5kg水和6kg淀粉，以160r/min转速混炼15分钟；再加入上述氧化铝细粉、二氧化硅微粉、氟化铝细粉，以160r/min转速继续混炼15分钟，得到混炼后的浇注料；
步骤二，成型，将混炼后的浇注料放入模具中进行成型浇注，待样品在模具中养护24小时后脱模，形成多孔陶瓷坯体；
步骤三，干燥，将脱模后的多孔陶瓷坯体于110℃的条件下干燥24小时；
步骤四，烧成，将干燥后的多孔陶瓷坯体以2℃/min升温至1350℃，煅烧3小时，随炉自然冷却后取出，即得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷。
本实施例制备的多孔陶瓷中的莫来石晶须的长径比为20.12，高温抗折强度为6.7MPa，显气孔率为74.5%。
实施例2：
本实施例给出的莫来石晶须增强的氧化铝空心球多孔陶瓷，物料组成为：粒径为3-0.1mm的氧化铝空心球68kg、粒径小于0.074mm的氧化铝细粉21kg、粒径小于0.045mm的二氧化硅微粉9kg、粒径小于0.074mm的氟化铝细粉2kg。以淀粉为结合剂和造孔剂，通过混炼、成型、干燥和烧成，得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷，具体操作步骤如下：
步骤一，将上述氧化铝空心球置于混炼机中，外加以6kg水和10kg淀粉，以160r/min转速混炼15分钟；再加入上述氧化铝细粉、二氧化硅微粉、氟化铝细粉，以160r/min转速继续混炼15分钟，得到混炼后的浇注料；
步骤二，成型，将混炼后的浇注料放入模具中进行成型浇注，待样品在模具中养护48小时后脱模，形成多孔陶瓷坯体；
步骤三，干燥，将脱模后的多孔陶瓷坯体于110℃的条件下干燥36小时；
步骤四，烧成，将干燥后的多孔陶瓷坯体以2℃/min升温至1450℃，煅烧3小时，随炉自然冷却后取出，即得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷。
本实施例制备的多孔陶瓷中的莫来石晶须的长径比为61.2，并在氧化铝空心球之间形成3D网络骨架结构，高温抗折强度为13.7MPa，显气孔率为67.5%。
实施例3：
本实施例给出的莫来石晶须增强的氧化铝空心球多孔陶瓷，物料组成为：粒径为3-0.1mm的氧化铝空心球65kg、粒径小于0.074mm的氧化铝细粉22kg、粒径小于0.045mm的二氧化硅微粉10.6kg、粒径小于0.074mm的氟化铝细粉2.4kg。以淀粉为结合剂和造孔剂，通过混炼、成型、干燥和烧成，得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷，具体操作步骤如下：
步骤一，将上述氧化铝空心球置于混炼机中，外加以7kg水和8kg淀粉，以160r/min转速混炼15分钟；再加入上述氧化铝细粉、二氧化硅微粉、氟化铝细粉，以160r/min转速继续混炼15分钟，得到混炼后的浇注料；
步骤二，成型，将混炼后的浇注料放入模具中进行成型浇注，待样品在模具中养护36小时后脱模，形成多孔陶瓷坯体；
步骤三，干燥，将脱模后的多孔陶瓷坯体于110℃的条件下干燥48小时；
步骤四，烧成，将干燥后的多孔陶瓷坯体以2℃/min升温至1550℃，煅烧3小时，随炉自然冷却后取出，即得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷。
本实施例制备的氧化铝空心球多孔陶瓷的莫来石晶须的长径比为10.1，高温抗折强度为9.5MPa，显气孔率60.1%。
Claims (3)
1.一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法，其特征在于，以重量份计，物料组成为：63-72份粒径为3-0.074mm的氧化铝空心球为主要原料，15-25份粒径小于0.074mm的氧化铝细粉、8-15份粒径小于0.045mm的二氧化硅微粉为基质，4-8份粒径小于0.074mm的氟化铝为催化剂，经混炼、成型、干燥、烧成，得到具有莫来石晶须增强氧化铝空心球多孔陶瓷，其具体操作步骤如下：
步骤一，将上述氧化铝空心球置于混炼机中，外加以上述物料总重量5-8%的水和4-10%的淀粉，以150-200r/min转速混炼10-20分钟；再加入上述氧化铝细粉、二氧化硅微粉、氟化铝细粉，以150-200r/min转速继续混炼10-20分钟，得到混炼后的浇注料；
步骤二，将混炼后的浇注料放入模具中进行成型浇注，待样品在模具中养护24-48小时后脱模，形成多孔陶瓷坯体；
步骤三，将脱模后的多孔陶瓷坯体于110℃的条件下干燥24-48小时；
步骤四，将干燥后的多孔陶瓷坯体升温至1350-1550℃，煅烧2-6小时，随炉自然冷却后取出，即得到具有莫来石晶须增强的氧化铝空心球多孔陶瓷。
2.根据权利要求1所述的一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法，其特征在于，所述步骤四中优选的煅烧时间为3-5小时。
3.根据权利要求1所述的一种莫来石晶须增强氧化铝空心球多孔陶瓷制备方法，其特征在于，所述步骤四中升温速率为1-5℃/min。
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| CN116589269A (zh) * | 2023-04-19 | 2023-08-15 | 福建省云智新材料科技有限公司 | 一种莫来石晶须的制备方法与应用 |
| CN118459207A (zh) * | 2024-07-09 | 2024-08-09 | 上海南极星高科技股份有限公司 | 一种高强隔热的氧化铝空心球基多孔陶瓷的制备方法 |
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