CN107973613A - 一种超高温多孔YbB6陶瓷的制备方法 - Google Patents

一种超高温多孔YbB6陶瓷的制备方法 Download PDF

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CN107973613A
CN107973613A CN201610916592.0A CN201610916592A CN107973613A CN 107973613 A CN107973613 A CN 107973613A CN 201610916592 A CN201610916592 A CN 201610916592A CN 107973613 A CN107973613 A CN 107973613A
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丁磊
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Zhangjagang City Sha Yuan Detection Technique Co Ltd
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Abstract

本申请公开了一种超高温多孔YbB6陶瓷的制备方法，包括步骤：(1)、以Yb2O3粉末和B4C粉末为原料混合；(2)、球磨；(3)、烘干、过筛；(4)、造粒：在Yb2O3/B4C粉末中加入8wt％的聚乙烯醇，充分研磨后再过筛；(5)、干压成型：将造粒好的粉料在180MPa的压力下压制成坯体，坯体的密度在1.5～1.8g/cm3；(6)、烧结：在氩气气氛下，按照3～5℃/min速率升至1600～1700℃保温1～2小时；(7)、冷却至室温。本发明通过调节坯体的密度可以控制多孔陶瓷的孔隙率和体收缩率，获得的陶瓷材料具有均匀的孔结构，孔隙率为61.7％，并且达到高的压缩强度23.1MPa。

Description

一种超高温多孔YbB6陶瓷的制备方法
技术领域
本申请属于材料技术领域，特别是涉及一种超高温多孔YbB6陶瓷的制备方法。
背景技术
YbB6作为超高温家族中的一员，具有很多独特的性能，例如高熔点、高的机械强度以及优异的化学稳定性。另外，YbB6还具有较低的理论密度，这对于航天领域来说具有很大的吸引力。
对于超高温应用来说多孔YbB6材料具有重要的应用价值，因为多孔材料中由于孔的存在，可以带来轻质、低的热导率以及较高的比表面积等。
发明内容
本发明的目的在于提供一种超高温多孔YbB6陶瓷的制备方法，以克服现有技术中的不足。
为实现上述目的，本发明提供如下技术方案：
本申请实施例公开一种超高温多孔YbB6陶瓷的制备方法，包括步骤：
(1)、以Yb2O3粉末和B4C粉末为原料混合；
(2)、球磨；
(3)、烘干、过筛；
(4)、造粒：在Yb2O3/B4C粉末中加入8wt％的聚乙烯醇，充分研磨后再过筛；
(5)、干压成型：将造粒好的粉料在180MPa的压力下压制成坯体，坯体的密度在1.5～1.8g/cm3；
(6)、烧结：在氩气气氛下，按照3～5℃/min速率升至1600～1700℃保温1～2小时；
(7)、冷却至室温。
优选的，在上述的超高温多孔YbB6陶瓷的制备方法中，所述步骤(2)中，球磨方法包括：将混合后的原料放入尼龙球磨罐中，以无水乙醇作为球磨介质，氧化锆为磨球，利用变频式行星球磨机球磨，球磨转速330～350rpm，按照原料：磨球：无水乙醇＝1:2:1比例球磨3～4小时。
优选的，在上述的超高温多孔YbB6陶瓷的制备方法中，所述步骤(3)中，烘干、过筛方法包括：将球磨后浆料在干燥箱中进行干燥，干燥温度60～80℃，干燥时间18～24小时，干燥完成后采用80～110目的筛子过筛，获得Yb2O3/B4C粉末。
优选的，在上述的超高温多孔YbB6陶瓷的制备方法中，所述步骤(6)中，按照5℃/min速率升至1650℃保温2小时。
与现有技术相比，本发明的优点在于：
本发明通过调节坯体的密度可以控制多孔陶瓷的孔隙率和体收缩率，获得的陶瓷材料具有均匀的孔结构，孔隙率为61.7％，并且达到高的压缩强度23.1MPa。
具体实施方式
本发明通过下列实施例作进一步说明：根据下述实施例，可以更好地理解本发明。然而，本领域的技术人员容易理解，实施例所描述的具体的物料比、工艺条件及其结果仅用于说明本发明，而不应当也不会限制权利要求书中所详细描述的本发明。
本实施例中，超高温多孔YbB6陶瓷的制备方法包括：
1、以Yb2O3粉末和B4C粉末为原料混合；
2、球磨：将混合后的原料放入尼龙球磨罐中，以无水乙醇作为球磨介质，氧化锆为磨球，利用变频式行星球磨机球磨，球磨转速330rpm，按照原料：磨球：无水乙醇＝1:2:1比例球磨4小时；
3、烘干、过筛：将球磨后浆料在干燥箱中进行干燥，干燥温度80℃，干燥时间24小时，干燥完成后采用110目的筛子过筛，获得Yb2O3/B4C粉末；
4、造粒：在Yb2O3/B4C粉末中加入8wt％的聚乙烯醇，充分研磨后再过筛；
5、干压成型：将造粒好的粉料在180MPa的压力下压制成坯体，坯体的密度在1.8g/cm3；
6、烧结：在氩气气氛下，按照5℃/min速率升至1650℃保温2小时；
7、冷却至室温。
本案通过调节坯体的密度可以控制多孔陶瓷的孔隙率和体收缩率，获得的陶瓷材料具有均匀的孔结构，孔隙率为61.7％，并且达到高的压缩强度23.1MPa。
最后，还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。

Claims (4)

1.一种超高温多孔YbB6陶瓷的制备方法，其特征在于，包括步骤：
(1)、以Yb2O3粉末和B4C粉末为原料混合；
(2)、球磨；
(3)、烘干、过筛；
(4)、造粒：在Yb2O3/B4C粉末中加入8wt％的聚乙烯醇，充分研磨后再过筛；
(5)、干压成型：将造粒好的粉料在180MPa的压力下压制成坯体，坯体的密度在1.5～1.8g/cm3；
(6)、烧结：在氩气气氛下，按照3～5℃/min速率升至1600～1700℃保温1～2小时；
(7)、冷却至室温。
2.根据权利要求1所述的超高温多孔YbB6陶瓷的制备方法，其特征在于：所述步骤(2)中，球磨方法包括：将混合后的原料放入尼龙球磨罐中，以无水乙醇作为球磨介质，氧化锆为磨球，利用变频式行星球磨机球磨，球磨转速330～350rpm，按照原料：磨球：无水乙醇＝1:2:1比例球磨3～4小时。
3.根据权利要求1所述的超高温多孔YbB6陶瓷的制备方法，其特征在于：所述步骤(3)中，烘干、过筛方法包括：将球磨后浆料在干燥箱中进行干燥，干燥温度60～80℃，干燥时间18～24小时，干燥完成后采用80～110目的筛子过筛，获得Yb2O3/B4C粉末。
4.根据权利要求1所述的超高温多孔YbB6陶瓷的制备方法，其特征在于：所述步骤(6)中，按照5℃/min速率升至1650℃保温2小时。
CN201610916592.0A 2016-10-21 2016-10-21 一种超高温多孔YbB6陶瓷的制备方法 Pending CN107973613A (zh)

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Application publication date: 20180501