CN109053168A - 一种超高温轻质保温涂抹料 - Google Patents
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Abstract
本发明提出了一种超高温（>1700℃）、内有高温热气流冲击等工况条件下的燃烧室或特殊炉膛内壁用的轻质保温涂抹料，提出的的涂抹料原料及质量百分比为：74μm≥粒径＞44um的刚玉质细粉10%‑20%，3μm≥粒径＞1um的α‑氧化铝微粉5%‑15%，多晶稳定型氧化锆质纤维（ZrO2+Y2O3≥98%）40%‑55%，硅溶胶20%‑30%，以及增塑剂1%‑3%。本发明采用多晶锆纤维作为主体材料，赋予材料超高温使用、轻量化、低导热的性能特点。采用溶胶结合，和其它原料组元共同形成泥膏状涂抹料，具有施工便利，修补维护方便等特点。
Description
技术领域
本发明属于耐火材料技术领域，涉及到超高温（>1700℃）工况下燃烧室或炉膛的内壁上涂抹的一种不定形耐火材料，具体涉及一种超高温轻质保温涂抹料。
背景技术
在一些特殊高温设备如发电机的燃烧室或特殊炉膛内壁，最里面需要粘附一薄层特殊材料，起到隔热保温、保护本体设备的效果。此时燃烧室内部不仅处于超高温的工况条件（一般处于1500℃以上的高温，最高使用温度超过1700℃），同时需要承受高速气流的热冲击作用；这层材料的厚度设计很薄，一般0.5-2cm左右，常常贴敷在高温金属或合金设备内壁上，以往选用多为鳞片或瓦片式的烧成陶瓷质小薄片，按照特殊的砌筑要求铺满内壁。但其使用过程中由于热气流的局部强冲击作用及砌筑施工质量的不确定性等因素仍会出现局部陶瓷小薄片的脱落，从而影响设备的正常周转使用；同时施工和局部更换费时，加工砌筑精度要求也比较高，且这种厚度的异形陶瓷薄片制作工艺成本也相对高些，因而使用异形薄片结构贴敷设备内壁的使用成本较高。
发明内容
为解决上述问题，本发明的目的是提出一种超高温轻质保温涂抹料。
本发明为完成上述目的采用如下技术方案：
一种超高温轻质保温涂抹料，轻质保温涂抹料的原料及质量百分比为：
刚玉质细粉 74mm≥粒径＞44mm 10%-20%；
α-氧化铝微粉 3μm≥粒径＞1um 5%-15%；
氧化锆纤维 40%-55%；
溶胶 20%-30%；
增塑剂 1%-3%；
所述原料的总质量为100%；所述的超高温轻质保温涂抹料为泥膏状。
所述的刚玉质细粉为高纯的烧结刚玉或电熔刚玉中的任何一种或者两种的组合。
所述的α-氧化铝微粉为活性氧化铝微粉。
所述的氧化锆纤维为ZrO2+Y2O3≥98%的多晶稳定型氧化锆质纤维。
所述的溶胶为体积质量分数20-30%的硅溶胶。
所述的增塑剂为膨润土、羧甲基纤维素中的一种或者两种的组合。
本发明提出的一种超高温轻质保温涂抹料，呈现泥膏状，属于ZrO2- Al2O3-SiO2体系；刚玉质细粉作为高熔点（tm=2050℃）、高耐火度（T＞1850℃）的耐火原料成为体系组元的一部分，活性氧化铝微粉除了作为高耐火度耐火原料，因为粒度更细，在泥膏状形态中更容易分散均匀；同时和体系中的增塑剂（膨润土或羧甲基纤维素）共同起到调整涂抹料可塑性的效果；它也可与体系中的硅溶胶在高温下反应生成高强莫来石，提高材料的抗热气流冲击效果。
本发明中添加的氧化锆纤维在体系中的含量最高，多晶稳定立方型锆质纤维（ZrO2+Y2O3≥98%），纤维直径＜8um；氧化锆的熔点2950℃，氧化锆纤维的堆积密度80-100kg/m3，使得材料具有高耐火、轻量化、低导热、抗热冲击性等特点。
本发明中采用硅溶胶作为结合剂，提供给材料中低温合适的强度，且高温下与体系中的氧化铝发生莫来化作用，赋予材料更高的强度。
综上所述，本发明具有如下特点：
(1) 本发明采用氧化锆纤维作为主原料，赋予材料超高温使用、轻量化、低导热的性能特点。
(2) 本发明以硅溶胶作为结合剂，和其它原料组元共同形成泥膏状涂抹料，具有施工便利，修补维护方便的特点。
具体实施方式
给出本发明的实施例对本发明加以说明，但不构成对本发明的任何限制。
根据下述3个实施例中的方案进行原料称量，先将1/3纤维和其它原料称量完毕一同放进搅拌机设备中，加入2/3硅溶胶量后搅拌5分钟，然后边搅拌边加入剩余的2/3纤维和余下的溶胶。全部原料加入完毕后继续搅拌10分钟呈现分散均匀、没有结块的泥膏状后准备施工待用。
实施例1：
配比方案：
白刚玉细粉 74mm≥粒径＞44mm 18%；
α-氧化铝微粉 3μm≥粒径＞1um 12%；
氧化锆纤维 45%；
硅溶胶 23%；
膨润土 2%。
实施例2：
配比方案：
板状刚玉细粉 74mm≥粒径＞44mm 20%；
α-氧化铝微粉 3μm≥粒径＞1um 15%；
氧化锆纤维 40%；
硅溶胶 24%；
羧甲基纤维素 1%。
实施例3：
配比方案：
板状刚玉细粉 74mm≥粒径＞44mm 4%；
白刚玉细粉 74mm≥粒径＞44mm 6%；
α-氧化铝微粉 3μm≥粒径＞1um 5%；
氧化锆纤维 52%；
硅溶胶 30%；
膨润土 1%；
羧甲基纤维素 2%。
附表说明：
表 不同实例的性能指标
Claims (6)
1.一种超高温轻质保温涂抹料，轻质保温涂抹料的原料及质量百分比为：
刚玉质细粉 74mm≥粒径＞44mm 10%-20%
α-氧化铝微粉 3μm≥粒径＞1um 5%-15%
氧化锆纤维 40%-55%
溶胶 20%-30%
增塑剂 1%-3%
所述的原料的总质量为100%，所述的超高温轻质保温涂抹料为泥膏状。
2.如权利要求1所述的一种超高温轻质保温涂抹料，其特征在于：所述的刚玉质细粉为高纯的烧结刚玉或电熔刚玉中的任何一种或者复合。
3.如权利要求1所述的一种超高温轻质保温涂抹料，其特征在于：所述的α-氧化铝微粉为活性氧化铝微粉中的任何一种。
4.如权利要求1所述的一种超高温轻质保温涂抹料，其特征在于：所述的氧化锆纤维为ZrO2+Y2O3≥98%的多晶稳定型氧化锆质纤维。
5.如权利要求1所述的一种超高温轻质保温涂抹料，其特征在于：所述的溶胶为体积质量分数20-30%的硅溶胶。
6.如权利要求1所述的一种超高温轻质保温涂抹料，其特征在于：所述的增塑剂为膨润土、羧甲基纤维素中的一种或者复合。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606724A (zh) * | 2020-06-17 | 2020-09-01 | 中钢南京环境工程技术研究院有限公司 | 一种碳化硅制品表面用耐火涂料 |
| CN114105616A (zh) * | 2021-11-30 | 2022-03-01 | 中钢集团洛阳耐火材料研究院有限公司 | 一种火箭发射平台新型低损耗防护材料 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606724A (zh) * | 2020-06-17 | 2020-09-01 | 中钢南京环境工程技术研究院有限公司 | 一种碳化硅制品表面用耐火涂料 |
| CN114105616A (zh) * | 2021-11-30 | 2022-03-01 | 中钢集团洛阳耐火材料研究院有限公司 | 一种火箭发射平台新型低损耗防护材料 |
| CN114105616B (zh) * | 2021-11-30 | 2023-11-14 | 中钢集团洛阳耐火材料研究院有限公司 | 一种火箭发射平台低损耗防护材料 |
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