CN106810211A - 进口氧化铝陶瓷粉烧结的温度控制方法 - Google Patents

进口氧化铝陶瓷粉烧结的温度控制方法 Download PDF

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CN106810211A
CN106810211A CN201611235811.5A CN201611235811A CN106810211A CN 106810211 A CN106810211 A CN 106810211A CN 201611235811 A CN201611235811 A CN 201611235811A CN 106810211 A CN106810211 A CN 106810211A
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minutes
uniform velocity
aluminium oxide
time control
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徐更中
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SHANGHAI COMPANION PRECISION CERAMICS CO Ltd
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Abstract

本发明涉及一种进口氧化铝陶瓷粉烧结的温度控制方法,包括以下步骤:室温~100℃,匀速升温2000分钟;100~300℃,匀速升温2500分钟;300~500℃,匀速升温2000分钟;500℃保温240分钟;500~1200℃,匀速升温3000分钟;1200℃保温240分钟;1200~1550℃,匀速升温2000分钟;1550~1500℃,匀速升温360分钟;1500~1100℃,匀速升温1200分钟;1100~400℃,匀速升温3000分钟;400~200℃自然冷却;打开炉门。本发明满足进口氧化铝陶瓷粉烧结排胶阶段的温度要求,排胶彻底,防止产品开裂,提高了成品性能和合格率。

Description

进口氧化铝陶瓷粉烧结的温度控制方法
技术领域
本发明属于陶瓷烧结的技术领域,特别是涉及一种进口氧化铝陶瓷粉烧结的温度控制方法。
背景技术
随着科技的进步,对特种氧化铝的性能、纯度及功能化的要求越来越高,特别是在半导体行业要求材料的纯度及抗酸性能、抗高温氧化的脱落及掉渣的要求在不断的提高。在此情况下引进了大量的进口氧化铝陶瓷粉作为原材料,这些原材料表面上看和国内自行生产的陶瓷粉差异不大,但实际内容物并不同。
首先,进口氧化铝陶瓷粉的原晶晶粒一般都较小,以AL-160SG-3P为例,其原晶在1μ左右,烧成后理想的密度可以达到3.92g/cm3以上,但是,细的原料同时也存在堆积的比表面积增大的问题,为了保证成型时较好的坯体强度就必须在原料中增加粘合材料。增加的粘合材料主要是一些有机化合物,如聚乙烯醇、丙三醇等等,这些有机物能够对陶瓷的烧结产生重大的影响,特别是在陶瓷产品烧成时的排胶阶段。众所周知,排胶阶段是影响陶瓷产品烧结质量的一个重要阶段,它对陶瓷的性能、成品率有着决定性的作用。氧化铝陶瓷粉原料添加的有机物有凝集剂、分散剂,它们都是胶装形态存在并且这些粘合材料是有多种组成,每种的挥发温度也不一样。
国产的氧化铝陶瓷粉原料造粒粉中一般是添加水溶聚乙烯醇,挥发温度从120℃左右开始至600℃左右挥发结束,而进口氧化铝陶瓷粉原料中添加了各种不同温度的粘合材料,排胶曲线与国产氧化铝陶瓷粉烧结的排线曲线并不吻合,如果采用传统的工艺对排胶的温度进行控制,就得不到理想性能的产品,特别是大件产品的报废率明显提高。
发明内容
本发明所要解决的技术问题是提供一种进口氧化铝陶瓷粉烧结的温度控制方法,满足进口氧化铝陶瓷粉烧结排胶阶段的温度要求,提升产品性能,提高成品合格率。
本发明解决其技术问题所采用的技术方案是提供一种进口氧化铝陶瓷粉烧结的温度控制方法,包括以下步骤:
(1)室温匀速升温至100℃,时间控制为2000分钟;
(2)100℃匀速升温至300℃,时间控制为2500分钟;
(3)300℃匀速升温至500℃,时间控制为2000分钟;
(4)500℃保温240分钟;
(5)500℃匀速升温至1200℃,时间控制为3000分钟;
(6)1200℃保温240分钟;
(7)1200℃匀速升温至1550℃,时间控制为2000分钟;
(8)1550℃匀速降温至1500℃,时间控制为360分钟;
(9)1500℃匀速降温至1100℃,时间控制为1200分钟;
(10)1100℃匀速降温至400℃,时间控制为3000分钟;
(11)400℃自然冷却降温至200℃;
(12)打开炉门。
作为本发明一种优选的实施方式,该温度控制过程通过可编程控制器进行自动控制。
有益效果
本发明的温度控制方法与进口氧化铝陶瓷粉的排胶曲线相吻合,能够满足进口氧化铝陶瓷粉烧结排胶阶段的温度要求,500℃时排胶基本完成,增加了4小时的保温时间,使得排胶更加彻底,同时在降温过程中逐步降温,防止急速降温造成产品开裂,提升了产品性能,成品的合格率由传统烧结温度控制的65%提高到90%。
具体实施方式
下面结合具体实施例,进一步阐述本发明。应理解,这些实施例仅用于说明本发明而不用于限制本发明的范围。此外应理解,在阅读了本发明讲授的内容之后,本领域技术人员可以对本发明作各种改动或修改,这些等价形式同样落于本申请所附权利要求书所限定的范围。
一种进口氧化铝陶瓷粉烧结的温度控制方法,包括以下步骤:
(1)室温匀速升温至100℃,时间控制为2000分钟;
(2)100℃匀速升温至300℃,时间控制为2500分钟;
(3)300℃匀速升温至500℃,时间控制为2000分钟;
(4)500℃保温240分钟;
(5)500℃匀速升温至1200℃,时间控制为3000分钟;
(6)1200℃保温240分钟;
(7)1200℃匀速升温至1550℃,时间控制为2000分钟;
(8)1550℃匀速降温至1500℃,时间控制为360分钟;
(9)1500℃匀速降温至1100℃,时间控制为1200分钟;
(10)1100℃匀速降温至400℃,时间控制为3000分钟;
(11)400℃自然冷却降温至200℃;
(12)打开炉门。
整个的温度控制过程通过可编程控制器进行自动控制。
该温度控制方法与进口氧化铝陶瓷粉的排胶曲线相吻合,能够满足进口氧化铝陶瓷粉烧结排胶阶段的温度要求,500℃时排胶基本完成,增加了4小时的保温时间,使得排胶更加彻底。同时在降温过程中逐步降温,防止急速降温造成产品开裂,提升了产品性能,成品的合格率由传统烧结温度控制的65%提高到90%。

Claims (2)

1.一种进口氧化铝陶瓷粉烧结的温度控制方法,包括以下步骤:
(1)室温匀速升温至100℃,时间控制为2000分钟;
(2)100℃匀速升温至300℃,时间控制为2500分钟;
(3)300℃匀速升温至500℃,时间控制为2000分钟;
(4)500℃保温240分钟;
(5)500℃匀速升温至1200℃,时间控制为3000分钟;
(6)1200℃保温240分钟;
(7)1200℃匀速升温至1550℃,时间控制为2000分钟;
(8)1550℃匀速降温至1500℃,时间控制为360分钟;
(9)1500℃匀速降温至1100℃,时间控制为1200分钟;
(10)1100℃匀速降温至400℃,时间控制为3000分钟;
(11)400℃自然冷却降温至200℃;
(12)打开炉门。
2.根据权利要求1所述的一种进口氧化铝陶瓷粉烧结的温度控制方法,其特征在于:该温度控制过程通过可编程控制器进行自动控制。
CN201611235811.5A 2016-12-28 2016-12-28 进口氧化铝陶瓷粉烧结的温度控制方法 Pending CN106810211A (zh)

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Cited By (1)

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CN114799202A (zh) * 2022-05-19 2022-07-29 贵州航天风华精密设备有限公司 一种粘结剂喷射金属3d打印翼面的制造方法

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Publication number Priority date Publication date Assignee Title
CN114799202A (zh) * 2022-05-19 2022-07-29 贵州航天风华精密设备有限公司 一种粘结剂喷射金属3d打印翼面的制造方法
CN114799202B (zh) * 2022-05-19 2023-12-05 贵州航天风华精密设备有限公司 一种粘结剂喷射金属3d打印翼面的制造方法

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