CN111548135A - 一种蜂窝陶瓷载体及其制备方法与应用 - Google Patents

一种蜂窝陶瓷载体及其制备方法与应用 Download PDF

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CN111548135A
CN111548135A CN202010444903.4A CN202010444903A CN111548135A CN 111548135 A CN111548135 A CN 111548135A CN 202010444903 A CN202010444903 A CN 202010444903A CN 111548135 A CN111548135 A CN 111548135A
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honeycomb ceramic
ceramic carrier
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sodium molybdate
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唐宋
唐玉其
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Hunan hongzuan Environmental Protection Technology Co.,Ltd.
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Hunan Deteng Environmental Protection Technology Co ltd
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Abstract

本发明涉及陶瓷领域，具体涉及一种蜂窝陶瓷载体及其制备方法与应用。所述蜂窝陶瓷载体的组分及各组分的重量份数为：滑石20‑30份，二氧化硅10‑30份，氧化铝5‑10份，高岭土10‑30份，氧化硼1‑4份，铬酸锶2‑8份，钼酸钠1‑4份，造孔剂15‑30份，分散剂0.2‑2份，挤压助剂0.2‑1份，水20‑30份；本发明通过氧化硼、铬酸锶、钼酸钠等原料的相互协同作用，提高了蜂窝陶瓷的力学性能，其轴向抗压强度最高可达28MPa，横向抗压强度可达5.6，软化温度为1440℃，热膨胀系数最低可达0.37*10‑6/℃，且制备过程操作简单环保。

Description

一种蜂窝陶瓷载体及其制备方法与应用
技术领域
本发明涉及陶瓷领域，具体涉及一种蜂窝陶瓷载体及其制备方法与应用。
背景技术
陶瓷材料具有优异的高温性能和化学稳定性，且不易滋生细菌，被广泛的应用于水净化和空气净化领域。
蜂窝陶瓷是一种结构似蜂窝形状的新型陶瓷产品，其具有过滤面积大被广泛应用于环保行业，现有技术中主要采用堇青石、钛酸铝、造孔剂和分散剂混合后通过研磨，过筛，配料，成型以及堵孔烧制而成，所获得的蜂窝陶瓷具有高孔隙率和热导率，但是其力学性能差，热膨胀率高，严重影响了蜂窝陶瓷的应用。
发明内容
针对现有技术中存在的不足，本发明提供了一种蜂窝陶瓷载体，所述蜂窝陶瓷载体的组分及各组分的重量份数为：
滑石20-30份，二氧化硅10-30份，氧化铝5-10份，高岭土10-30份，氧化硼1-4份，铬酸锶2-8份，钼酸钠1-4份，造孔剂15-30份，分散剂0.2-2份，挤压助剂0.2-1份，水20-30份。
本发明还提供了一种蜂窝陶瓷载体的制备方法，所述制备方法包括一下步骤：
取滑石、二氧化硅、氧化铝、高岭土、氧化硼、铬酸锶、钼酸钠进行混合并球磨过筛获得混合粉体；
将造孔剂加入到水中搅拌获得糊料，并将所述混合粉体、分散剂和挤压助剂加入到所述糊料中获得泥料；
将所述泥料进行真空练泥和陈腐后获得备用泥料，并将所述备用泥料挤压成型，干燥后获得蜂窝陶瓷坯体；
将所述蜂窝陶瓷坯体进行错位堵孔后进行烧制获得蜂窝陶瓷载体。
有益效果：
本发明通过氧化硼、铬酸锶、钼酸钠等原料的相互协同作用，提高了蜂窝陶瓷的力学性能，其轴向抗压强度最高可达28MPa，横向抗压强度可达5.6，软化温度为1440℃，另外其热膨胀系数小，最低可达0.37*10-6/℃，且制备过程操作简单环保。
具体实施方式
为了更加清楚阐述本发明的技术内容，在此结合具体实施例予以详细说明，显然，所列举的实施例只是本技术方案的优选实施方案，本领域的技术人员可以根据所公开的技术内容显而易见地得出的其他技术方案仍属于本发明的保护范围。
本发明提供了一种蜂窝陶瓷载体，所述蜂窝陶瓷载体的组分及各组分的重量份数为：
滑石20-30份，二氧化硅10-30份，氧化铝5-10份，高岭土10-30份，氧化硼1-4份，铬酸锶2-8份，钼酸钠1-4份，造孔剂15-30份，分散剂0.2-2份，挤压助剂0.2-1份，水20-30份。
本发明还提供了一种蜂窝陶瓷载体，所述蜂窝陶瓷载体的组分及各组分的重量份数为：
滑石26份，二氧化硅18份，氧化铝6份，高岭土18份，氧化硼2份，铬酸锶5份，钼酸钠3份，造孔剂20份，分散剂0.8份，挤压助剂0.7份，水26份。
进一步，所述铬酸锶、氧化硼、钼酸钠的质量比为5:2-3:2-3；所述造孔剂为甲基纤维素、氯化铵或石墨中的任意一种；所述分散剂为油酸、月桂酸钾中的任意一种；所述挤压助剂为甘油、聚乙二醇中的人以一种。
本发明还提供了一种蜂窝陶瓷载体的制备方法，所述制备方法包括一下步骤：取滑石、二氧化硅、氧化铝、高岭土、氧化硼、铬酸锶、钼酸钠进行混合并球磨过筛获得混合粉体；将造孔剂加入到水中搅拌获得糊料，并将所述混合粉体、分散剂和挤压助剂加入到所述糊料中获得泥料；将所述泥料进行真空练泥和陈腐后获得备用泥料，并将所述备用泥料挤压成型，干燥后忽的蜂窝陶瓷坯体；将所述蜂窝陶瓷坯体进行错位堵孔后进行烧制获得蜂窝陶瓷载体。
进一步，所述干燥过程具体包括：采用频率在1000MHz～3000MHz的电磁波进行微波干燥10-20min；所述烧制过程具体包括：以2-4℃/min的速率升温至800-1000℃条件下烧制6-10h，停止加热，冷却至室温。
上述蜂窝陶瓷载体可以作为颗粒捕集器。
以下以具体实施例对本发明进行具体说明：
实施例1
称取滑石22份，二氧化硅28份，氧化铝6份，高岭土15份，氧化硼3份，铬酸锶7份，钼酸钠3份，甲基纤维素15份，油酸0.5份，聚乙二醇0.5份，水25份。将滑石、二氧化硅、氧化铝、高岭土、氧化硼、铬酸锶、钼酸钠混合并在料球比为1:1.2的条件下研磨8h，过300目筛获得混合粉体。
将甲基纤维素加入到水中充分搅拌呈糊料，加入上述混合粉体以及油酸和聚乙二醇搅拌获得泥料，将所述泥料在真空练泥机中对泥料真空处理，并进行陈腐以除去泥料中的空气体积，提高可塑性，获得备用泥料；将所述备用泥料挤压成型，并在频率为1000MHz的电磁波条件下微波干燥18min获得蜂窝陶瓷坯体。
将所述蜂窝陶瓷坯体进行错位堵孔，并将堵孔后的蜂窝陶瓷装炉，以升温速率为2℃/min升温至850℃烧制10h，停止加热冷却至室温，获得蜂窝陶瓷载体。
实施例2
称滑石26份，二氧化硅18份，氧化铝6份，高岭土18份，氧化硼2份，铬酸锶5份，钼酸钠3份，氯化铵20份，油酸0.8份，甘油0.7份，水26份。将滑石、二氧化硅、氧化铝、高岭土、氧化硼、铬酸锶、钼酸钠混合并在料球比为1:1.2的条件下研磨8h，过300目筛获得混合粉体。
将氯化铵加入到水中充分搅拌呈糊料，加入上述混合粉体以及油酸和甘油搅拌获得泥料，将所述泥料在真空练泥机中对泥料真空处理，并进行陈腐以除去泥料中的空气体积，提高可塑性，获得备用泥料；将所述备用泥料挤压成型，并在频率为2000MHz的电磁波条件下微波干燥15min获得蜂窝陶瓷坯体。
将所述蜂窝陶瓷坯体进行错位堵孔，并将堵孔后的蜂窝陶瓷装炉，以升温速率为3℃/min升温至900℃烧制8h，停止加热冷却至室温，获得蜂窝陶瓷载体。
实施例3
称取滑石30份，二氧化硅11份，氧化铝10份，高岭土27份，氧化硼2份，铬酸锶4份，钼酸钠2份，石墨15份，月桂酸钾0.5份，聚乙二醇0.5份，水25份。将滑石、二氧化硅、氧化铝、高岭土、氧化硼、铬酸锶、钼酸钠混合并在料球比为1:1.2的条件下研磨8h，过300目筛获得混合粉体。
将石墨加入到水中充分搅拌呈糊料，加入上述混合粉体以及月桂酸钾和聚乙二醇搅拌获得泥料，将所述泥料在真空练泥机中对泥料真空处理，并进行陈腐以除去泥料中的空气体积，提高可塑性，获得备用泥料；将所述备用泥料挤压成型，并在频率为3000MHz的电磁波条件下微波干燥10min获得蜂窝陶瓷坯体。
将所述蜂窝陶瓷坯体进行错位堵孔，并将堵孔后的蜂窝陶瓷装炉，以升温速率为4℃/min升温至950℃烧制6h，停止加热冷却至室温，获得蜂窝陶瓷载体。
对比例1
将实施例2中氧化硼省略，其他原料和制备方法完全相同，获得蜂窝陶瓷载体。
对比例2
将实施例2中铬酸锶省略，其他原料和制备方法完全相同，获得蜂窝陶瓷载体。
对比例3
将实施例2中钼酸钠省略，其他原料和制备方法完全相同，获得蜂窝陶瓷载体。
对比例4
取氧化硼5份，铬酸锶5份，钼酸钠2份，其他原料和制备方法与实施例2完全相同，获得蜂窝陶瓷载体。
对比例5
取氧化硼2份，铬酸锶4份，钼酸钠1份，其他原料和制备方法与实施例2完全相同，获得蜂窝陶瓷载体。
将实施例1-3和对比例1-5获得的蜂窝陶瓷载体测定其力学性能、从室温到800℃的热膨胀系数和软化温度，结果见表1。
表1蜂窝陶瓷载体的性能测试数据
Figure BDA0002505454290000051
由表1可知，本发明技术方案获得的蜂窝陶瓷载体具有良好的力学性能，轴向抗压强度最高可达28MPa，横向抗压强度可达5.6MPa，且耐高温，软化温度大于1400℃，且其热膨胀系数低均<0.5*10-6/℃。根据对比例1-5可知，本发明中原料氧化硼、铬酸锶、钼酸钠及其比例对蜂窝陶瓷体系的各方面性能具有较大的影响，对各方面性能具有协同增效作用，其主要因为在烧制过程中个原料之间发生相应的反应，形成具有特殊结构的结晶，使得其热膨胀系数大大降低，同时提高了其抗压性能和耐高温性。
以上所述实施例，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明的技术范围内，根据本发明的技术方案及其构思加以等同替换或改变，都应涵盖在本发明的保护范围内。

Claims (10)

1.一种蜂窝陶瓷载体，其特征在于，所述蜂窝陶瓷载体的组分及各组分的重量份数为：
滑石20-30份，二氧化硅10-30份，氧化铝5-10份，高岭土10-30份，氧化硼1-4份，铬酸锶2-8份，钼酸钠1-4份，造孔剂15-30份，分散剂0.2-2份，挤压助剂0.2-1份，水20-30份。
2.根据权利要求1所述的蜂窝陶瓷载体，其特征在于，所述蜂窝陶瓷载体的组分及各组分的重量份数为：
滑石26份，二氧化硅18份，氧化铝6份，高岭土18份，氧化硼2份，铬酸锶5份，钼酸钠3份，造孔剂20份，分散剂0.8份，挤压助剂0.7份，水26份。
3.根据权利要求1所述的蜂窝陶瓷载体，其特征在于，所述铬酸锶、氧化硼、钼酸钠的质量比为5:2-3:2-3。
4.根据权利要求1所述的蜂窝陶瓷载体，其特征在于，所述造孔剂为甲基纤维素、氯化铵或石墨中的任意一种。
5.根据权利要求1所述的蜂窝陶瓷载体，其特征在于，所述分散剂为油酸、月桂酸钾中的任意一种。
6.根据权利要求1所述的蜂窝陶瓷载体，其特征在于，所述挤压助剂为甘油、聚乙二醇中的任意一种。
7.一种蜂窝陶瓷载体的制备方法，其特征在于，所述制备方法包括一下步骤：
取滑石、二氧化硅、氧化铝、高岭土、氧化硼、铬酸锶、钼酸钠进行混合并球磨过筛获得混合粉体；
将造孔剂加入到水中搅拌获得糊料，并将所述混合粉体、分散剂和挤压助剂加入到所述糊料中获得泥料；
将所述泥料进行真空练泥和陈腐后获得备用泥料，并将所述备用泥料挤压成型，干燥后获得蜂窝陶瓷坯体；
将所述蜂窝陶瓷坯体进行错位堵孔后进行烧制获得蜂窝陶瓷载体。
8.根据权利要求7所述的蜂窝陶瓷载体制备方法，其特征在于，所述干燥过程具体包括：
采用频率在1000MHz～3000MHz的电磁波进行微波干燥10-20min。
9.根据权利要求7所述的蜂窝陶瓷载体制备方法，其特征在于，所述烧制过程具体包括：
以2-4℃/min的速率升温至800-1000℃条件下烧制6-10h，停止加热，冷却至室温。
10.根据权利要求1-6任意所述蜂窝陶瓷载体，其特征在于，所述蜂窝陶瓷载体作为颗粒捕集器的应用。
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