CN106116559B - 一种电场辅助陶瓷低温快烧装置 - Google Patents

一种电场辅助陶瓷低温快烧装置 Download PDF

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CN106116559B
CN106116559B CN201610776999.8A CN201610776999A CN106116559B CN 106116559 B CN106116559 B CN 106116559B CN 201610776999 A CN201610776999 A CN 201610776999A CN 106116559 B CN106116559 B CN 106116559B
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temperature
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electric field
power supply
heating plate
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刘金铃
王光
王一光
刘佃光
高燕
安立楠
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Southwest Jiaotong University
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Abstract

本发明公开了一种电场辅助陶瓷低温快烧装置，包括加热板、直流电源、红外相机和数据采集装置；所述加热板用于放置和加热试样，试样两端分别连接直流电源的正负极；加热板对应位置设置有红外相机，红外相机连接数据采集装置；本发明通过加热板为陶瓷提供热能，在直流电场的辅助下，实现陶瓷材料的低温快速烧结；通过红外相机和数据采集装置可以实现原位观测闪烧各个阶段试样温度的变化和线性收缩，有效地降低了能耗和设备的要求。

Description

一种电场辅助陶瓷低温快烧装置
技术领域
本发明涉及一种陶瓷低温快烧装置，具体涉及一种电场辅助陶瓷低温快烧装置。
背景技术
陶瓷具有优越的力学、电学、光学、声学、磁学等性能，在工业应用上倍受瞩目，其使用范围亦日渐扩大；烧结是陶瓷致密化不可或缺的一个过程，这个过程需要消耗大量的能量，同时会引起一系列环境问题；为了响应节约能源和保护环境的号召，研究者不断开发新的烧结技术；例如微波烧结、热等静压烧结、放电等离子烧结等；这些烧结方法不仅节约了能源，还提高了材料的性能，为材料的广泛应用做出了贡献；2010年由Rishi Raj提出一种新的陶瓷烧结方法-闪烧；这种烧结方法在电场辅助下，陶瓷材料在几秒之内即可实现致密化，烧结的炉温明显低于其他烧结方法；现有的闪烧装置存在以下问题：一是加热设备相对比较昂贵，不便于普及；二是烧结是在封闭炉体中进行的，不便于原位实时观测；三是现有的闪烧装置相对比较复杂，不便于操作；四是加热速率相对较慢，不便于快速化工业生产；五是之前的闪烧装置只能测量闪烧过程中一个点的温度变化，不能测量试样局部或者整体温度分布。
发明内容
本发明提供了一种结构简单、方便、快捷，便于实施观测的电场辅助陶瓷低温快烧装置。
本发明采用的技术方案是：一种电场辅助陶瓷低温快烧装置，包括加热板、直流电源、红外相机和数据采集装置；所述加热板用于放置和加热试样，试样两端分别连接直流电源的正负极；加热板对应位置设置有红外相机，红外相机连接数据采集装置。
进一步的，所述加热板设置在加热台上。
进一步的，所述加热板表面设置有一层99氧化铝片。
进一步的，所述试样两端分别通过高温合金丝连接直流电源的正负极。
进一步的，所述高温合金丝为镍铬合金丝、记忆合金丝、电热合金丝、铂铱合金丝、钨铼合金丝、铁铬铝合金丝中的一种。
进一步的，所述直流电源和数据采集装置之间连接有电压表。
进一步的，所述直流电源和数据采集装置之间连接有电流表。
进一步的，所述直流电源和数据采集装置之间通过数据传输线连接有电压表；直流电源和数据采集装置之间通过数据传输线连接有电流表。
进一步的，所述红外相机数据采集频率在10-200 Hz之间可调。
本发明的有益效果是：
（1）本发明通过设置加热板为陶瓷烧结提供热能，在直流电场的辅助下实现陶瓷的低温快速烧结；
（2）本发明设置红外相机可以原位观测闪烧各个阶段试样温度的变化和线性收缩；
（3）本发明结构简单、使用方便、快捷，有效降低了能耗和设备的要求，可用于陶瓷的连续化生产。
附图说明
图1为本发明结构示意图。
图中：1-加热台，2-红外相机，3-直流电源，4-数据采集装置，5-试样，6-加热板，7-高温合金丝，8-电流表，9-电压表，10-数据传输线。
具体实施方式
下面结合附图和具体实施例对本发明作进一步说明。
如图1所示，一种电场辅助陶瓷低温快烧装置，包括加热板6、直流电源3、红外相机2和数据采集装置4；所述加热板6用于放置和加热试样5，试样5两端分别连接直流电源3的正负极；加热板6对应位置设置有红外相机2，红外相机2连接数据采集装置4。
使用时，通过加热板6为试样5烧结提供所需温度，并由外加直流电源3形成直流电场激发快速传质，实现陶瓷材料的低温快速致密化，且可以通过红外相机2实时原位观测烧结各个阶段试样5温度和线性收缩；直流电源3的电压在0-1000V连续可调，准确度为±0.5%；直流电源3的电流在0-30V之间连续可调，准确度为±0.5%，能够满足大量材料闪烧时对电压和电流的要求；加热板6即可为陶瓷烧结提供足够高的温度，降低了对高温设备的要求；加热板6温度在室温到500oC之间连续可调，升温速率快，十分钟之内即可完成从室温到500oC的升温；红外相机2可同时实现温度测量和陶瓷坯体尺寸的测量；温度测量范围从40oC-2500oC，温度测量的准确度在±1oC；尺寸测量范围0-500mm，尺寸测量的准确度在±1mm；数据采集装置4可以对试样5的温度和尺寸进行实时显示，为烧结过程提供便利；借助红外相机2的快速拍照和数据采集装置4的显示，可以实时观测试样5的线性收缩。
进一步的，所述加热板6设置在加热台1上；通过加热台1对加热板6进行升温。
进一步的，所述加热板6表面设置有一层99氧化铝片。
进一步的，所述试样5两端分别通过高温合金丝7连接直流电源3的正负极。
进一步的，所述高温合金丝7为镍铬合金丝、记忆合金丝、电热合金丝、铂铱合金丝、钨铼合金丝、铁铬铝合金丝中的一种。
进一步的，所述直流电源3和数据采集装置4之间连接有电压表9；连接电压表9可以实现对电压的实时显示，为烧结过程控制提供便利。
进一步的，所述直流电源3和数据采集装置4之间连接有电流表8；连接电流表8可以实现对电流的实时显示，为烧结过程控制提供便利。
进一步的，所述直流电源3和数据采集装置4之间通过数据传输线10连接有电压表9；直流电源3和数据采集装置4之间通过数据传输线10连接有电流表8。
进一步的，所述红外相机2数据采集频率在10-200 Hz之间可调。
实施例1
采用本发明装置烧结La0.6Sr0.4Co0.2Fe0.8O3陶瓷的具体步骤如下：
1）将条形试样5的两端通过高温合金丝7连接到直流电源3的正负极，随后将试样5平放在加热板6表面的99氧化铝片上；
2）将加热台1设定在300oC，开始升温，达到设定温度后，保温30min，使试样5的温度和加热台1表面温度达到平衡；
3）加热台1保温时，将电压设置为30V，电流设置为7.2A；
4）连接红外相机2、电压表9、电流表8和数据采集装置4，实时采集温度、线收缩、电压和电流数据；
5）保温30min后，接通直流电源3，在试样5出现闪烧后，在此状态下保温60s，随后关闭直流电源3、加热台1，烧结结束。
实施例2
采用本发明装置烧结La0.6Sr0.4Co0.2Fe0.8O3陶瓷的具体步骤如下：
1）将条形试样5的两端通过高温合金丝7连接到直流电源3的正负极，随后将试样5平放在加热板6表面的99氧化铝片上；
2）将加热台1设定在200oC，开始升温，达到设定温度后，保温30min，使试样5的温度和加热台1表面温度达到平衡；
3）加热台1保温时，将电压设置为60V，电流设置为7.2A；
4）连接红外相机2、电压表9、电流表8和数据采集装置4，实时采集温度、线收缩、电压和电流数据；
5）保温30min后，接通直流电源3，在试样5出现闪烧后，在此状态下保温60s，随后关闭直流电源3、加热台1，烧结结束。
实施例3
采用本发明装置烧结Co2MnO4陶瓷的具体步骤如下：
1）将条形试样5的两端通过高温合金丝7连接到直流电源3的正负极，随后将试样5平放在加热板6表面的99氧化铝片上；
2）将加热台1设定在300oC，开始升温，达到设定温度后，保温30min，使试样5的温度和加热台1表面温度达到平衡；
3）加热台1保温时，将电压设置为50V，电流设置为10A；
4）连接红外相机2、电压表9、电流表8和数据采集装置4，实时采集温度、线收缩、电压和电流数据；
5）保温30min后，接通直流电源3，在试样5出现闪烧后，在此状态下保温60s，随后关闭直流电源3、加热台1，烧结结束。
实施例4
采用本发明装置烧结La0.6Sr0.4Co0.2Fe0.8O3陶瓷的具体步骤如下：
1）将条形试样5的两端通过高温合金丝7连接到直流电源3的正负极，随后将试样5平放在加热板6表面的99氧化铝片上；
2）将加热台1设定在200oC，开始升温，达到设定温度后，保温30min，使试样5的温度和加热台1表面温度达到平衡；
3）加热台1保温时，将电压设置为100V，电流设置为10A；
4）连接红外相机2、电压表9、电流表8和数据采集装置4，实时采集温度、线收缩、电压和电流数据；
5）保温30min后，接通直流电源3，在试样5出现闪烧后，在此状态下保温60s，随后关闭直流电源3、加热台1，烧结结束。
本发明通过加热板6为陶瓷提供热能，在直流电场的辅助下，实现陶瓷材料的低温快速烧结；通过红外相机2和数据采集装置4可以实现原位观测闪烧各个阶段试样5温度的变化和线性收缩，有效地降低了能耗和设备的要求，可用于陶瓷的连续化生产。

Claims (7)

1.一种电场辅助陶瓷低温快烧装置，其特征在于：包括加热板(6)、直流电源(3)、红外相机(2)和数据采集装置(4)；所述加热板(6)用于放置和加热试样(5)，试样(5)两端分别连接直流电源(3)的正负极；加热板(6)对应位置设置有红外相机(2)，红外相机(2)连接数据采集装置(4)；所述加热板(6)设置在加热台(1)上；所述加热板(6)表面设置有一层99氧化铝片。
2.根据权利要求1所述的一种电场辅助陶瓷低温快烧装置，其特征在于：所述试样(5)两端分别通过高温合金丝(7)连接直流电源(3)的正负极。
3.根据权利要求2所述的一种电场辅助陶瓷低温快烧装置，其特征在于：所述高温合金丝(7)为镍铬合金丝、记忆合金丝、铂铱合金丝、钨铼合金丝、铁铬铝合金丝中的一种。
4.根据权利要求1所述的一种电场辅助陶瓷低温快烧装置，其特征在于：所述直流电源(3)和数据采集装置(4)之间连接有电压表(9)。
5.根据权利要求1所述的一种电场辅助陶瓷低温快烧装置，其特征在于：所述直流电源(3)和数据采集装置(4)之间连接有电流表(8)。
6.根据权利要求4或5所述的一种电场辅助陶瓷低温快烧装置，其特征在于：所述直流电源(3)和数据采集装置(4)之间通过数据传输线(10)连接有电压表(9)；直流电源(3)和数据采集装置(4)之间通过数据传输线(10)连接有电流表(8)。
7.根据权利要求1所述的一种电场辅助陶瓷低温快烧装置，其特征在于：所述红外相机(2)数据采集频率在10-200Hz之间可调。
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