CN113773108B - 一种微通孔泡沫陶瓷吸音材料及其制备方法 - Google Patents
一种微通孔泡沫陶瓷吸音材料及其制备方法 Download PDFInfo
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Abstract
本发明涉及陶瓷材料技术领域,尤其是一种微通孔泡沫陶瓷吸音材料及其制备方法,利用特定聚合物与复合纤维、膨胀珍珠岩、炭质材料、硅酸盐水泥复合制备成吸音基体,再经釉料浸渍后烧结,使得吸音材料的吸音性能良好,且能够保障具有较高的强度。
Description
技术领域
本发明涉及陶瓷材料技术领域,尤其是一种微通孔泡沫陶瓷吸音材料及其制备方法。
背景技术
吸音材料被广泛应用于建筑行业,以实现对声源隔绝,使得声源衰减,避免在一定区域内受到噪音的影响。通常吸音材料的降噪系数NRC越大,其降噪效果越佳,因此,如何提高吸音材料的降噪系数,成为吸音材料重点研究的方向;同时,吸音材料大多数应用环境是在户外,还需要兼具良好的机械性能和耐候性,才有助于延长吸音材料的使用寿命。
目前,市场上使用的吸音材料根据是否具有金属属性分为两类:①金属材料制备而成的吸音材料,例如:铝纤维吸声板、铝泡沫吸声板等,其具有良好的吸声性能,降噪系数维持在0.6~0.8之间,且具有优异的力学性能和材料稳定性能,长期使用变化较小;但是其成本较高;②非金属材料制备而成吸音材料,例如:泡沫水泥吸声板、岩棉吸声板、珍珠岩吸声板等,具有防火、耐腐蚀、耐候性强等优点,但存在着强度低、吸声性能差,且吸声材料使用时,所需要的厚度较大。
鉴于此,陶瓷吸声材料得到了广大研究者的重点关注与研究,形成了具有吸声功能的陶瓷材料;然而,陶瓷吸声材料主要是经过调整其孔隙率来达到满足较高的吸声性能目的,因此,随着吸声性能的提升,必然导致陶瓷吸声材料的强度下降,致使陶瓷吸声材料很难满足对吸声性能和强度的综合性需求。
发明内容
为了解决现有技术中存在的上述技术问题,本发明提供一种微通孔泡沫陶瓷吸音材料及其制备方法。
具体是通过以下技术方案得以实现的:
微通孔泡沫陶瓷吸音材料,由吸音基体浸渍釉料烧结而成,所述吸音基体由以质量份计为聚合物5-8份、复合纤维1-3份、膨胀珍珠岩1-3份、炭质材料0.02-0.8份、硅酸盐水泥0.1-1份制备而成;所述釉料由以质量份计为氧化锌1份、白云石1.5份、碳酸钙3.2份、二氧化硅10.3份、三氧化二铝3.5份、长石3.1份、黏土7份制备而成。
利用特定聚合物与复合纤维、膨胀珍珠岩、炭质材料、硅酸盐水泥复合制备成吸音基体,再经釉料浸渍后烧结,使得吸音材料的吸音性能良好,且能够保障具有较高的强度。本发明创造采用的釉料是按照传统的工艺制备而成,例如:将釉料各原料成分混合均匀后,采用球磨机球磨成浆料。本发明创造优选釉料球磨之后过500目筛,改善釉料的颗粒度,有助于增强浸渍烧结后的强度。本发明创造采用特定的聚合物是由以质量份计为PVC树脂5-8份,氯化聚乙烯1-2份、邻苯二甲酸二丁酯1.5份、三盐基硫酸铅0.01-0.4份组成,经搅拌、研磨而成;该聚合物在用于制备成吸音基体时,需要加水研磨成浆液后,再将吸音基体材料的其他原料添加混合,该聚合物材料应用后,有助于增强强度和耐候性,避免传统陶瓷吸音材料制备过程,采用稀土氧化物和/或氧化锆等材料来改善强度的作用,降低陶瓷吸音材料制备成本。优选,所述聚合物是由以质量份计为PVC树脂6份,氯化聚乙烯1份、邻苯二甲酸二丁酯1.5份、三盐基硫酸铅0.1份组成。该配比条件下,能够使得吸音材料的吸音性能优异,强度更高。
优选,所述的吸音基体由以质量份计为聚合物7份、复合纤维2份、膨胀珍珠岩2份、炭质材料0.3份、硅酸盐水泥0.5份制备而成。
优选,所述的复合纤维为碳纤维与石英纤维按质量比为1:1.3混合而成。
优选,所述的复合纤维平均直径<0.06mm,且最大直径<0.08mm,长度介于3-5mm之间。
优选,所述的炭质材料为木屑与锯末按质量比为1:1混合而成的复合物。
本发明创造目的之二提供上述微通孔泡沫陶瓷吸音材料制备方法,包括以下步骤:
S1:吸音基体制备:将聚合物与水按照质量比为1:5混合,送入研磨机研磨成浆液,然后加入复合纤维、膨胀珍珠岩,开启搅拌机,搅拌速度为1000-3000r/min,搅拌30min,再加入硅酸盐水泥,搅拌20min,再加入炭质材料,搅拌10min,得到浆料;浆料注模、挤压成型、干燥、烧结、随炉冷却,得吸音基体;
S2:基体浸渍烧结:将S1步骤所得吸音基体浸渍到釉料中,取出吸音基体,放置沥干,烧结、随炉冷却,即得。
经吸音基体制备后,再将基体浸渍釉料后烧结,随炉冷却制备成陶瓷吸音材料,其吸音性能优异,强度高。
优选,所述的步骤S1,干燥是在恒温40℃烘烤1h,再置于湿度为60-80%的环境中放置吸潮30min,再送入恒温为60℃烘烤10h,再置于湿度为60-80%的环境中放置吸潮30min,再送入烧结室内以8℃/min的升温速度升温至1000℃后,恒温烧结8h。
优选,所述的步骤S2,沥干是将取出的吸音基体放置于湿度为40-50%的环境中,直至吸音基体表面沥干,且用手按压无痕迹后,送入烧结室内以8℃/min的升温速度升温至1000℃后,恒温烧结2h。
与现有技术相比,本发明创造的技术效果体现在:
本发明所得的微通孔泡沫陶瓷吸音材料经检测,能够在保持良好吸音性能的同时,具有较高的强度,使得抗压强度达到了12MPa以上,抗折强度达到了3.5MPa以上,恒定在较高吸音系数时,其吸音频率范围较宽。
本发明创造工艺流程简单,易于操作。
附图说明
图1为本发明创造工艺流程图。
图2为实施例1-5制备材料的吸音关系曲线图。
具体实施方式
下面结合附图和具体的实施方式来对本发明的技术方案做进一步的限定,但要求保护的范围不仅局限于所作的描述。
如图1所示,微通孔泡沫陶瓷吸音材料制备方法,包括以下步骤:
聚合物制备:将PVC树脂、氯化聚乙烯、邻苯二甲酸二丁酯、三盐基硫酸铅混合,搅拌均匀,研磨过400目筛。
釉料制备:氧化锌、白云石、碳酸钙、二氧化硅、三氧化二铝、长石、黏土混合均匀后,加水球磨,过500目筛,制备成浆液,且水的加入量占釉料总质量30%。
吸音基体制备:将聚合物与水按照质量比为1:5混合,送入研磨机研磨成浆液,然后加入复合纤维、膨胀珍珠岩(粒径介于0.3-1mm,密度介于100-120kg/m3之间),开启搅拌机,搅拌速度为介于1000-3000r/min之间,搅拌30min,再加入硅酸盐水泥,搅拌20min,再加入炭质材料,搅拌10min,得到浆料;浆料注模、挤压成型,在恒温40℃烘烤1h,再置于湿度介于60-80%之间的环境中放置吸潮30min,再送入恒温为60℃烘烤10h,再置于湿度介于60-80%之间的环境中放置吸潮30min,再送入烧结室内以8℃/min的升温速度升温至1000℃后,恒温烧结8h,随炉冷却,得吸音基体。
浸渍烧结:将吸音基体浸渍到釉料中30min,取出,放置于湿度介于40-50%之间的环境中,直至吸音基体表面沥干,且用手按压无痕迹后,送入烧结室内以8℃/min的升温速度升温至1000℃后,恒温烧结2h、随炉冷却,即得。
利用上述制备工艺,本研究者就吸音基体、釉料、聚合物的原料成分配比进行研究,并针对不同配比研究所得的微通孔泡沫陶瓷吸音材料的吸音性能、强度等性能进行检测,其结果如下表所示。
表:吸音、强度性能检测(质量单位:kg)
备注:实施例1-5中采用的“复合纤维”,其平均直径<0.06mm,且最大直径<0.08mm,长度介于3-5mm之间;且所采用的复合纤维是从市场上购买相应直径、长度的碳纤维、石英纤维配制而得。
除此之外,本研究者经过对聚合物原料成分研究,将PVC树脂称取5kg,氯化聚乙烯称取1kg,邻苯二甲酸二丁酯称取1.5kg,三盐基硫酸铅称取0.01kg,并将其制备成聚合物后,将其按照实施例3的吸音基体制备、釉料制备,并将吸音基体浸渍入釉料中后,取出沥干烧结制备成微通孔泡沫陶瓷吸音材料,经检测该吸音材料的最大吸音系数为0.987,最大吸音频率为580Hz,抗压强为13.9MPa,抗折强度为3.78MPa。
将实施例1-5制备的微通孔泡沫陶瓷吸音材料吸声系数与吸声频率关系进行研究,其结果如图2所示。本发明创造经过对吸音基体原料成分及配比,釉料原料成分及配比进行合理的控制与调整,将有助于提高微通孔泡沫陶瓷吸音材料的吸音性能,使得在较宽吸音频率范围内,维持在较高的吸音系数;且所得吸音材料的抗折、抗压强度均较高,抗折强度达到3.5MPa以上,抗压强度达到12MPa以上,极大程度改善了微通孔泡沫陶瓷吸音材料中吸音系数与强度之间的综合性能。
本发明创造其他未尽事宜参照现有技术或者本领域技术人员所熟知的公知常识,常规技术手段加以实现即可。
本发明创造上述实施例仅限于对本发明创造作出较佳实施方案的解释和说明,并不是对本发明创造技术方案的限定,本领域技术人员在此基础上所作出常规技术手段的替代等非突出实质性特征和显著进步的改进,均属于本发明创造所公开的保护范畴。
Claims (7)
1.一种微通孔泡沫陶瓷吸音材料,由吸音基体浸渍釉料烧结而成,其特征在于,所述吸音基体由以质量份计为聚合物5-8份、复合纤维1-3份、膨胀珍珠岩1-3份、炭质材料0.02-0.8份、硅酸盐水泥0.1-1份制备而成;所述釉料由以质量份计为氧化锌1份、白云石1.5份、碳酸钙3.2份、二氧化硅10.3份、三氧化二铝3.5份、长石3.1份、黏土7份制备而成;
所述的聚合物由以质量份计为PVC树脂5-8份,氯化聚乙烯1-2份、邻苯二甲酸二丁酯1.5份、三盐基硫酸铅0.01-0.4份组成,经搅拌、研磨而成;
所述的复合纤维为碳纤维与石英纤维按质量比为1:1.3混合而成;
所述的复合纤维平均直径<0.06mm,且最大直径<0.08mm,长度介于3-5mm之间。
2.如权利要求1所述的微通孔泡沫陶瓷吸音材料,其特征在于,所述的吸音基体由以质量份计为聚合物7份、复合纤维2份、膨胀珍珠岩2份、炭质材料0.3份、硅酸盐水泥0.5份制备而成。
3.如权利要求1所述的微通孔泡沫陶瓷吸音材料,其特征在于,所述的聚合物由以质量份计为PVC树脂6份,氯化聚乙烯1份、邻苯二甲酸二丁酯1.5份、三盐基硫酸铅0.1份组成。
4.如权利要求1或2所述的微通孔泡沫陶瓷吸音材料,其特征在于,所述的炭质材料为木屑与锯末按质量比为1:1混合而成的复合物。
5.如权利要求1-4任一项所述的微通孔泡沫陶瓷吸音材料制备方法,其特征在于,包括以下步骤:
S1:吸音基体制备:将聚合物与水按照质量比为1:5混合,送入研磨机研磨成浆液,然后加入复合纤维、膨胀珍珠岩,开启搅拌机,搅拌速度为1000-3000r/min,搅拌30min,再加入硅酸盐水泥,搅拌20min,再加入炭质材料,搅拌10min,得到浆料;浆料注模、挤压成型、干燥、烧结、随炉冷却,得吸音基体;
S2:基体浸渍烧结:将S1步骤所得吸音基体浸渍到釉料中,取出吸音基体,放置沥干,烧结,即得。
6.如权利要求5所述的微通孔泡沫陶瓷吸音材料制备方法,其特征在于,所述的步骤S1,干燥是在恒温40℃烘烤1h,再置于湿度为60-80%的环境中放置吸潮30min,再送入恒温为60℃烘烤10h,再置于湿度为60-80%的环境中放置吸潮30min,再送入烧结室内以8℃/min的升温速度升温至1000℃后,恒温烧结8h。
7.如权利要求5所述的微通孔泡沫陶瓷吸音材料制备方法,其特征在于,所述的步骤S2,沥干是将取出的吸音基体放置于湿度为40-50%的环境中,直至吸音基体表面沥干,且用手按压无痕迹后,送入烧结室内以8℃/min的升温速度升温至1000℃后,恒温烧结2h。
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