CN111004020A - 一种低温制备高纯氧化铝陶瓷基片的方法 - Google Patents

一种低温制备高纯氧化铝陶瓷基片的方法 Download PDF

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CN111004020A
CN111004020A CN201911361168.4A CN201911361168A CN111004020A CN 111004020 A CN111004020 A CN 111004020A CN 201911361168 A CN201911361168 A CN 201911361168A CN 111004020 A CN111004020 A CN 111004020A
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傅成志
陈旭
李亚男
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Binzhou Ono New Material Technology Co.,Ltd.
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Abstract

本发明涉及陶瓷材料领域,具体涉及一种低温制备高纯氧化铝陶瓷基片的方法,将纳米级氧化铝粉体与微米级氧化铝粉体按一定比例混合,以醇类为溶剂,添加助剂,球磨混合得到浆料,再将浆料流延成型,静置干燥后得到生料带,生料带经裁剪后再进行等静压成型,得到坯片,最后将坯片烧结,得到所述低温制备高纯氧化铝陶瓷基片。本发明通过不同粒径的氧化铝粉体之间进行级配,使颗粒之间接触点增多,在较低温度下烧结出质地致密、性能良好的Al2O3陶瓷基片,通过复合成型实现基片的高致密度和低气孔率。

Description

一种低温制备高纯氧化铝陶瓷基片的方法
技术领域
本发明涉及陶瓷材料领域,具体涉及一种低温制备高纯氧化铝陶瓷基片的方法。
背景技术
陶瓷材料化学性能稳定、热导率高、介电常数低、耐热冲击性和电绝缘性好、高频特性优异、可靠性高、线膨胀系数与电子元器件非常相近,可用于对热导率和气密性要求较高的场合,是常用的基片材料。已投入使用的陶瓷基片有Al2O3、BeO、Si3N4、SiC和AlN等。其中Al2O3基片价格低,强度、硬度、化学稳定性和耐热冲击性能高,绝缘性和与金属附着性良好,是目前综合性能较好、应用最成熟的陶瓷材料,市场份额占比最高,但流延料浆中的大量功能助剂极易导致坯体结构疏松化,弱化后期烧结效果,同时高纯氧化铝陶瓷在烧结过程中需要的温度非常高(>1800℃),造成能耗大,生产成本高。高的烧结温度也促使晶粒长大、气孔难以排除,导致陶瓷的气密性变差、力学性能降低,难以达到技术要求。
发明内容
基于上述技术背景,本发明提供了一种低温制备高纯氧化铝陶瓷基片的方法,通过不同粒径的氧化铝粉体之间进行级配,使颗粒之间接触点增多,在较低温度下烧结出质地致密、性能良好的Al2O3陶瓷基片,通过复合成型实现基片的高致密度和低气孔率。
本发明是通过以下技术方案实现的:
一种低温制备高纯氧化铝陶瓷基片的方法,将纳米级氧化铝粉体与微米级氧化铝粉体按一定比例混合,以醇类为溶剂,添加助剂,球磨混合得到浆料,再将浆料流延成型,静置干燥后得到生料带,生料带经裁剪后再进行等静压成型,得到坯片,最后将坯片烧结,得到所述低温制备高纯氧化铝陶瓷基片;
其中,所述纳米级氧化铝粉体的粒径为100-300nm,所述微米级氧化铝粉体的粒径为0.5-50μm,优选为两种粒径的微米级氧化铝粉体,一种是粒径为 0.5-0.8μm的微米级氧化铝粉体,一种是粒径为0.8-5μm的微米级氧化铝粉体;
其中,氧化铝粉体的混合比例为:纳米级氧化铝粉体的质量百分比为0-10%,粒径为0.5-0.8μm的微米级氧化铝粉体的质量百分比为60-80%,粒径为0.8-5μm 的微米级氧化铝粉体的质量百分比为10-40%;
其中,所述醇类为无水乙醇、异丙醇或正丁醇中的一种;
其中,所述等静压成型的压力为60-120MPa,保压时间10-30min;
其中,所述烧结的终烧温度为1600-1680℃;
其中,所述球磨所使用的研磨球为氧化铝球或氧化锆球。
本发明的有益效果是:(1)烧结温度低,避免了高温度烧结所引起的晶粒长大、气孔难以排除,导致陶瓷的气密性变差、力学性能降低,难以达到技术要求的问题;(2)所制备的高纯氧化铝陶瓷基片致密度高,气孔率低。
具体实施方式
下面是结合实施例对本发明进一步说明。
所有实施例所使用的主要原料规格如下:
纳米级氧化铝粉体:市售,纯度≥99.99%;
微米级氧化铝粉体:市售,纯度≥99.99%;
助剂及添加剂:市售,分析纯。
实施例1
1、分别称取纳米级氧化铝粉体10g,粒径0.5μm氧化铝粉体60g,粒径2 μm氧化铝粉体30g,80ml无水乙醇作为溶剂,氧化铝球作为研磨介质,引入分散剂、粘结剂、增塑剂、添加剂等功能助剂,球磨混合得浆料,待用;
2、成型:将浆料倒入流延成型机中流延,待浆料流延完毕后,静置干燥得到流延生料带;然后将干燥后的流延生料带进行裁剪,置于等静压机中二次成型,成型压力80MPa,保压15min,得到坯片。
3、将成型后坯片置于电阻炉中,进行烧结,终烧温度1600℃,得到氧化铝陶瓷基片。
采用该方法制得的氧化铝陶瓷基片密度3.75g/cm3、气孔率1.10%,抗弯强度325MPa。
实施例2
1、分别称取纳米级氧化铝粉体6g,粒径0.8μm氧化铝粉体72g,粒径5 μm氧化铝粉体22g,70ml无水乙醇作为溶剂,氧化锆球作为研磨介质,引入分散剂、粘结剂、增塑剂、添加剂等功能助剂,球磨混合得浆料,待用;
2、成型:将浆料倒入流延成型机中流延,待浆料流延完毕后,静置干燥得到流延生料带;然后将干燥后的流延生料带进行裁剪,置于等静压机中二次成型,成型压力90MPa,保压15min,得到坯片。
3、将成型后坯片置于电阻炉中,进行烧结,终烧温度1640℃,得到氧化铝陶瓷基片。
采用该方法制得的氧化铝陶瓷基片密度3.76g/cm3、气孔率0.93%,抗弯强度332MPa。
实施例3
1、分别称取粒径0.6μm氧化铝粉体60g,粒径0.8μm氧化铝粉体30g,粒径3.5μm氧化铝粉体10g,60ml无水乙醇作为溶剂,氧化铝球作为研磨介质,引入分散剂、粘结剂、增塑剂、添加剂等功能助剂,球磨混合得浆料,待用;
2、成型:将浆料倒入流延成型机中流延,待浆料流延完毕后,静置干燥得到流延生料带;然后将干燥后的流延生料带进行裁剪,置于等静压机中二次成型,成型压力100MPa,保压10min,得到坯片。
3、将成型后坯片置于电阻炉中,进行烧结,终烧温度1680℃,得到氧化铝陶瓷基片。
采用该方法制得的氧化铝陶瓷基片密度3.78g/cm3、气孔率0.85%,抗弯强度348MPa。
实施例4
1、分别称取纳米级氧化铝粉体10g,粒径0.6μm氧化铝粉体80g,粒径3 μm氧化铝粉体10g,100ml无水乙醇作为溶剂,氧化铝球作为研磨介质,引入分散剂、粘结剂、增塑剂、添加剂等功能助剂,球磨混合得浆料,待用;
2、成型:将浆料倒入流延成型机中流延,待浆料流延完毕后,静置干燥得到流延生料带;然后将干燥后的流延生料带进行裁剪,置于等静压机中二次成型,成型压力60MPa,保压30min,得到坯片。
3、将成型后坯片置于电阻炉中,进行烧结,终烧温度1620℃,得到氧化铝陶瓷基片。
采用该方法制得的氧化铝陶瓷基片密度3.76g/cm3、气孔率0.90%,抗弯强度327MPa.
实施例5
1、分别称取纳米级氧化铝粉体3g,粒径0.5μm氧化铝粉体75g,粒径4 μm氧化铝粉体22g,75ml正丁醇作为溶剂,氧化铝球作为研磨介质,引入分散剂、粘结剂、增塑剂、添加剂等功能助剂,球磨混合得浆料,待用;
2、成型:将浆料倒入流延成型机中流延,待浆料流延完毕后,静置干燥得到流延生料带;然后将干燥后的流延生料带进行裁剪,置于等静压机中二次成型,成型压力120MPa,保压10min,得到坯片。
3、将成型后坯片置于电,阻炉中,进行烧结,终烧温度1660℃,得到氧化铝陶瓷基片。
采用该方法制得的氧化铝陶瓷基片密度3.77g/cm3、气孔率0.90%,抗弯强度333MPa。

Claims (8)

1.一种低温制备高纯氧化铝陶瓷基片的方法,其特征在于,将纳米级氧化铝粉体与微米级氧化铝粉体按一定比例混合,以醇类为溶剂,添加助剂,球磨混合得到浆料,再将浆料流延成型,静置干燥后得到生料带,生料带经裁剪后再进行等静压成型,得到坯片,最后将坯片烧结,得到所述低温制备高纯氧化铝陶瓷基片。
2.根据权利要求1所述一种低温制备高纯氧化铝陶瓷基片的方法,其特征在于,所述纳米级氧化铝粉体的粒径为100-300nm,所述微米级氧化铝粉体的粒径为0.5-50μm。
3.根据权利要求2所述一种低温制备高纯氧化铝陶瓷基片的方法,其特征在于,所述微米级氧化铝粉体包括粒径为0.5-0.8μm的微米级氧化铝粉体和粒径为0.8-5μm的微米级氧化铝粉体。
4.根据权利要求3所述一种低温制备高纯氧化铝陶瓷基片的方法,其特征在于,所述混合比例为:纳米级氧化铝粉体的质量百分比为0-10%,粒径为0.5-0.8μm的微米级氧化铝粉体的质量百分比为60-80%,粒径为0.8-5μm的微米级氧化铝粉体的质量百分比为10-40%。
5.根据权利要求1所述一种低温制备高纯氧化铝陶瓷基片的方法,其特征在于,所述醇类为无水乙醇、异丙醇或正丁醇中的一种。
6.根据权利要求1所述一种低温制备高纯氧化铝陶瓷基片的方法,其特征在于,所述等静压成型的压力为60-120MPa,保压时间10-30min。
7.根据权利要求1所述一种低温制备高纯氧化铝陶瓷基片的方法,其特征在于,所述烧结的终烧温度为1600-1680℃。
8.根据权利要求1所述一种低温制备高纯氧化铝陶瓷基片的方法,其特征在于,所述球磨混合工序中所使用的研磨球为氧化铝球或氧化锆球。
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CN112250426A (zh) * 2020-10-21 2021-01-22 苏州晶瓷超硬材料有限公司 一种高纯氧化铝陶瓷及其制备方法
CN115231903A (zh) * 2022-07-14 2022-10-25 佛山市百瑞新材料技术有限公司 一种大尺寸高纯陶瓷基板的制备工艺
CN116675520A (zh) * 2023-06-12 2023-09-01 陕西宝光陶瓷科技有限公司 一种7-13um粒径煅烧α氧化铝粉体及高密度陶瓷的制备方法
CN117362011A (zh) * 2023-12-04 2024-01-09 基迈克材料科技(苏州)有限公司 一种氧化铝陶瓷的制备方法及其氧化铝陶瓷

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CN116675520A (zh) * 2023-06-12 2023-09-01 陕西宝光陶瓷科技有限公司 一种7-13um粒径煅烧α氧化铝粉体及高密度陶瓷的制备方法
CN117362011A (zh) * 2023-12-04 2024-01-09 基迈克材料科技(苏州)有限公司 一种氧化铝陶瓷的制备方法及其氧化铝陶瓷

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