CN110423124A - 一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料及其制备方法 - Google Patents

一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料及其制备方法 Download PDF

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CN110423124A
CN110423124A CN201910642700.3A CN201910642700A CN110423124A CN 110423124 A CN110423124 A CN 110423124A CN 201910642700 A CN201910642700 A CN 201910642700A CN 110423124 A CN110423124 A CN 110423124A
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resistant materials
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李勇
吴晓芳
李宏宇
薛文东
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University of Science and Technology Beijing USTB
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Abstract

本发明涉及耐火材料领域，特别涉及一种(Al2OC)x(AlN)1‑x固溶体结合致密刚玉质耐火材料及其制备方法。其原料组成如下：97‑82wt％的刚玉，3‑18wt％的金属铝粉及额外1‑6wt％的结合剂酚醛树脂。制备方法包括以下步骤：利用轮碾机将原料进行混合；将混合料困料24h以上；利用液压机在高于100MPa的压力下压制成型；200℃干燥12h以上；在氮气炉进行高温烧结，随后随炉冷却，即得到(Al2OC)x(AlN)1‑x固溶体结合致密刚玉质耐火材料。本发明制备方法简单、原料简单、成本低廉、设备要求低。

Description

一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料及其制 备方法
技术领域
本发明涉及耐火材料领域，特别涉及一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料及其制备方法。
背景技术
刚玉质耐火材料具有耐高温、硬度大、强度高、抗氧化、电绝缘、气密性好高温耐冲刷等优良性能，但是抗侵蚀性和热震稳定性有待提高。通常加入石墨来提高提高其性能。现有技术存在的缺点：石墨的加入使得抗氧化性有待提高，需要加入抗氧化剂，浸渍氧化抑制剂或者表面涂层。
作为Al2OC与AlN的固溶体，(Al2OC)x(AlN)1-x固溶体具有熔点高、高温稳定性好和耐蚀性优异外，还具有碳化物热导率高、热膨胀率小、抗热冲击性好等优点。现有技术存在的缺点：通常以AlN、Al4C3、Al2O3为原料通过高温热压来制备(Al2OC)x(AlN)1-x固溶体，(Al2OC)x(AlN)1-x固溶体的工业化生产较为困难。
发明内容
本发明为了克服上述现有技术的缺点提出的，其所解决的技术问题是提供一种性能更加优良且制备简单的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，以及这种耐火材料的制备方法。
一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，其特征在于其原料组成为97-82wt％的刚玉，3-18wt％的金属铝粉及额外1-6wt％的结合剂酚醛树脂。
进一步地，所述金属铝粉的粒度为0-45μm。
一种如上所述(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料制备方法，其特征在于包括以下步骤：利用轮碾机将原料进行混合；将混合料困料24h以上；利用液压机在高于100MPa的压力下压制成型；200℃干燥12h以上；在氮气炉进行高温烧结，随后随炉冷却，即得到(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料。
进一步地，所述烧结时通入纯度高于99vol％，压力高于0.001MPa的流动氮气。
进一步地，所述烧结工艺是：升温至1300-1800℃并保温1h以上或先升温至500～660℃并保温2h以上，随后升温至1600℃并保温1h以上，随炉冷却，得到(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料。
该制备方法原料简单、成本低廉、设备要求低，成功制备了(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，可大规模制备。
附图说明
图1为本发明实施例1提供的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料制备方法制得的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料的XRD图。
图2为本发明实施例2提供的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料制备方法制得的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料的XRD图。
具体实施方式
本发明实施例提供的一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，其原料组成如下：97-82wt％的刚玉，3-18wt％的金属铝粉及额外1-6wt％的结合剂酚醛树脂，其中所述金属铝粉的粒度为0-45μm。
一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料制备方法，其特征在于包括以下步骤：利用轮碾机将原料进行混合；利用轮碾机将原料进行混合；将混合料困料24h以上；利用液压机在高于100MPa的压力下压制成型；200℃干燥12h以上；在氮气炉进行高温烧结，随后随炉冷却。进一步地，烧结时通入纯度高于99vol％，压力高于0.001MPa的流动氮气；烧结时升温至1300-1800℃并保温1h以上或先升温至500-660℃并保温2h以上，随后升温至1600℃并保温1h以上，随炉冷却，得到(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料。
实施例1
一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，其原料组成如下：91wt％的刚玉，9wt％的金属铝粉及3.5wt％的酚醛树脂结合剂，所述金属铝粉的粒度为0-45μm。
所述的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料的制备方法如下：利用轮碾机将原料进行混合；将混合料困料48h；利用液压机在200MPa下压制成型；200℃干燥24h；在氮气炉进行高温烧结，随后随炉冷却，烧结时通入纯度为99.99vol％，压力为0.01MPa的高纯流动氮气。升温至1700℃并保温3h；得到(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料。
本实施例1制得的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，其XRD见图1，结果表明：主要增强相为(Al2OC)x(AlN)1-x固溶体。
实施例2
一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，其原料组成如下：88wt％的刚玉，12wt％的金属铝粉及3.5wt％的酚醛树脂结合剂，所述金属铝粉的粒度为0-45μm。
所述的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料的制备方法如下：利用轮碾机将原料进行混合；将混合料困料48h；利用液压机在200MPa下压制成型；200℃干燥24h；在氮气炉进行高温烧结，随后随炉冷却，烧结时通入纯度为99.99vol％，压力为0.01MPa的高纯流动氮气。升温至580℃并保温8h，随后升温至1600℃并保温3h，随后随炉冷却，得到(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料。
本实施例2制得的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，其XRD见图2，结果表明：主要增强相为(Al2OC)x(AlN)1-x固溶体。
以上所述的实施例仅用以说明本发明的技术方案而非限制，所属领域技术人员应该理解，本领域技术人员对本发明的技术方案做出各种变形和改进，而不脱离本发明技术方案的精神和范围，其均应涵盖在本发明的权利要求范围内。

Claims (5)

1.一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，其特征在于其原料组成为97-82wt％的刚玉，3-18wt％的金属铝粉及额外1-6wt％的结合剂酚醛树脂。
2.根据权利要求1所述的(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料，其特征在于：所述金属铝粉的粒度为0-45μm。
3.一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料制备方法，其特征在于包括以下步骤：利用轮碾机将原料进行混合；将混合料困料24h以上；利用液压机在高于100MPa的压力下压制成型；200℃干燥12h以上；在氮气炉进行高温烧结，随后随炉冷却，即得到(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料。
4.根据权利要求3所述(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料的制备方法，其特征在于：所述烧结时通入纯度高于99vol％，压力高于0.001MPa的流动氮气。
5.根据权利要求3所述(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料的制备方法，其特征在于：所述烧结工艺是：升温至1300-1800℃并保温1h以上或先升温至500～660℃并保温2h以上，随后升温至1600℃并保温1h以上，随炉冷却，得到(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料。
CN201910642700.3A 2019-07-16 2019-07-16 一种(Al2OC)x(AlN)1-x固溶体结合致密刚玉质耐火材料及其制备方法 Pending CN110423124A (zh)

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CN112250451A (zh) * 2020-09-23 2021-01-22 北京科技大学 一种高炉陶瓷杯用Al2OC-AlN固溶体结合刚玉耐火材料及制备方法

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* Cited by examiner, † Cited by third party
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CN112250451A (zh) * 2020-09-23 2021-01-22 北京科技大学 一种高炉陶瓷杯用Al2OC-AlN固溶体结合刚玉耐火材料及制备方法

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Application publication date: 20191108