CN109574702A - 一种陶瓷的制备方法 - Google Patents

一种陶瓷的制备方法 Download PDF

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CN109574702A
CN109574702A CN201710899107.8A CN201710899107A CN109574702A CN 109574702 A CN109574702 A CN 109574702A CN 201710899107 A CN201710899107 A CN 201710899107A CN 109574702 A CN109574702 A CN 109574702A
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ceramics
amphene
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green body
alumina powder
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黄勇
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Juancheng Yongming Carpet Co Ltd
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    • C04B38/0615—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances the burned-out substance being a monolitic element having approximately the same dimensions as the final article, e.g. a porous polyurethane sheet or a prepreg obtained by bonding together resin particles
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Abstract

本发明公开了一种陶瓷的制备方法，该制备方法操作简便、可行。本发明的制备方法：（a）将氧化铝粉末、莰烯和脂肪酸缩聚物混合得浆料；（b）注浆料成型得坯体；（c）烘干坯体，然后热处理得梯度多孔氧化铝陶瓷。本发明利用莰烯在不同温度下结晶速率不同的性质得到梯度多孔氧化铝陶瓷的孔定向分布，形状可控，孔呈网络连通型，孔隙率高，解决了现有制备方法得到的梯度多孔陶瓷存在孔分布性差、孔形状不易控制、孔隙率低的问题。

Description

一种陶瓷的制备方法
技术领域
本发明涉及一种陶瓷的制备方法。
背景技术
陶瓷种类繁多，根据成孔方法和孔隙结构其大致又可分为多孔陶瓷、蜂窝陶瓷、泡沫陶瓷、波纹陶瓷以及孔梯度陶瓷和多孔功能陶瓷等种类。多孔陶瓷与其它多孔材料相比具有化学稳定性好、机械强度良好、刚度好、耐热性好、热膨胀系数低、密度低、孔隙率高等优点，因而多孔陶瓷在高温隔热、主动冷却、燃料电池、过滤器、吸音等领域获得广泛的应用。梯度多孔陶瓷的特点是具有大量气孔，且孔径随材料尺寸作梯度分布的陶瓷，气孔的形状、含量、孔径及其分布对其性能和功能有着重大影响，因此其制备工艺除具有一般陶瓷工艺的特点外，还应具有如何形成比较合理的孔结构的工艺机制。目前孔梯度陶瓷材料主要采用注浆成型和溶胶凝胶法，但是该方法成型制备孔梯度陶瓷时，各层是分别注浆而成，由于不同粒度层的干燥和烧结收缩率不同，在制品的成型过程中常常出现分层或分离现象，造成孔分布性差，陶瓷成品性能下降。
发明内容
为解决上述问题，本发明采用技术方案为：一种陶瓷的制备方法，包括以下步骤：一、将氧化铝粉末、莰烯(C10H16)和脂肪酸缩聚物混合后放入恒温球磨机中，在50～60℃下球磨湿混20～30h得混合浆料，其中氧化铝粉末与莰烯的体积比为1∶4～19，脂肪酸缩聚物的质量是氧化铝粉末和莰烯总质量的1％～3％，所述脂肪酸缩聚物为Texaphor963；二、将模具浸入液氮中1～3min后将步骤一得到的浆料倒入模具中，再静置30～60min，然后脱模得坯体，其中以模具底面为基准，液氮液面位于模具底部的1/2～2/3处；
三、将坯体置于室温、空气气氛条件下放置64～80h后，再在30～50℃温度下干燥64～80h；
四、将经步骤三处理后的坯体放入马弗炉中，以1～3℃/s的升温速率加热至1200～1500℃，然后保温烧结2～4h，再随炉冷却至室温，得到梯度多孔氧化铝陶瓷。
本发明的有益效果是：本发明的陶瓷的孔分布均匀有序，且形状大小可控，为网络连通型。同时，莰烯无毒无污染、经济实惠，给本发明带来了更好的工业应用前景。
具体实施方式
下列实施例将进一步说明本发明。
一种陶瓷的制备方法，具体包括以下步骤：
一、将氧化铝粉末、莰烯(C10H16)和脂肪酸缩聚物混合后放入恒温球磨机中，在60℃下球磨湿混30h得混合浆料，其中氧化铝粉末与莰烯的体积比为1∶19，脂肪酸缩聚物的质量是氧化铝粉末和莰烯总质量的3％，所述脂肪酸缩聚物为Texaphor963；
二、将模具浸入液氮中1～3min后将步骤一得到的浆料倒入模具中，再静置60min，然后脱模得坯体，其中以模具底面为基准，液氮液面位于模具底部的2/3处；
三、将坯体置于室温、空气气氛条件下放置80h后，再在50℃温度下干燥80h；
四、将经步骤三处理后的坯体放入马弗炉中，以3℃/s的升温速率加热至1500℃，然后保温烧结4h，再随炉冷却至室温，得到梯度多孔氧化铝陶瓷；其中，步骤二中模具的侧壁是树脂保温材料，底部为导热金属。
具体地，孔隙成网络连通型的梯度多孔氧化铝陶瓷，氧化铝陶瓷的孔隙率高，孔呈定向均匀分布，且形状可控。
具体地，所得到的梯度多孔陶瓷的孔隙率为71％～86％，密度为0.63～0.88g/cm3，压缩强度为8～38MPa。

Claims (3)

1.一种陶瓷的制备方法，其特征在于，包括以下步骤：
（a）将氧化铝粉末、莰烯和脂肪酸缩聚物混合后放入恒温球磨机中，在50～60℃下球磨湿混20～30h得混合浆料，其中氧化铝粉末与莰烯的体积比为1∶4～19，脂肪酸缩聚物的质量是氧化铝粉末和莰烯总质量的1％～3％，所述脂肪酸缩聚物为Texaphor963；
（b）将模具浸入液氮中1～3min后将步骤一得到的浆料倒入模具中，再静置30～60min，然后脱模得坯体，其中以模具底面为基准，液氮液面位于模具底部的1/2～2/3处；
(c)将坯体置于室温、空气气氛条件下放置64～80h后，再在30～50℃温度下干燥64～80h；
(d)将经上述步骤处理后的坯体放入马弗炉中，以1～3℃/s的升温速率加热至1200～1500℃，然后保温烧结2～4h，再随炉冷却至室温，得到梯度多孔氧化铝陶瓷。
2.如权利要求1所述的陶瓷的制备方法，其特征在于，所述莰烯的质量纯度大于97％。
3.如权利要求1所述的陶瓷的制备方法，其特征在于，所述氧化铝粉末与莰烯的体积比为1∶9。
CN201710899107.8A 2017-09-28 2017-09-28 一种陶瓷的制备方法 Pending CN109574702A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110078471A (zh) * 2019-05-17 2019-08-02 江门市东鹏智能家居有限公司 基于废瓷回收利用的高压注浆陶瓷浆料及制备方法、系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110078471A (zh) * 2019-05-17 2019-08-02 江门市东鹏智能家居有限公司 基于废瓷回收利用的高压注浆陶瓷浆料及制备方法、系统
CN110078471B (zh) * 2019-05-17 2021-11-02 江门市东鹏智能家居有限公司 基于废瓷回收利用的高压注浆陶瓷浆料及制备方法、系统

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