最新多孔氧化铝陶瓷的放电等离子烧结技术制备

多孔氧化铝陶瓷的放电等离子烧结技术制

备

ScienceDirect

学科指南

Porous Alumina Ceramics Fabricated by

Spark Plasma Sintering

多孔氧化铝陶瓷的放电等离子烧结技术制备WANG Kun, FU Zheng-yi*, PENG Yong,

WANG Yu-cheng,

ZHANG Jin-gong, ZHANG Qing-jie

王坤，福郑毅，彭勇，王宇城，

张晋宫，张庆街

State Key Lab ofAdvanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan, 430070, China

国家重点实验室先进的材料合成与加工技术，武汉理工大学，武汉，430070，中国

Received 10 August 2006; accepted 6 November 2006 2006年8月10收到； 2006年11月6日接受Abstract

摘要

Porous alumina of regular spherical particles was fabricated with the spark plasma sintering (SPS) and then compared to those obtamed

through conventional hot pressing (HP). The effects of the parameters of the heating process on porosity were also investigated. Microstructural studies suggest that porous ingots including regular pores be made out of regular spherical alumina particles due to the close sphere packages. A comparative study on the relative necks of the specimens produced by SPS and HP indicates an enhancement of neck growth with SPS. Contrasting the theoretical values to the experimental results over the relative necks indicates that a proper relationship between the relative necks and the porosity can be established by a sintering model.

多孔氧化铝为规则的球形颗粒与放电等离子烧结（SPS）制备，然后比较分析通过常规热压（惠普）。同时考察了加热过程的参数对孔隙率的影响。微观结构研究表明，多孔硅锭包括定期毛孔被制造出来的规则的球形氧化铝颗粒由于接近球包。在SPS和惠普生产的标本，相对的脖子比较研究表明SPS颈部生长的增强。对比理论值的实验结果表明，在相对的脖子相对的脖子和孔隙度之间的关系可以通过烧结模型的建立。

Keywords: spark plasma sintering (SPS); porous alumina ceramics; sintering neck

关键词：放电等离子烧结（SPS）；多孔氧化铝陶瓷；烧结颈

1 Introduction

1引言

Porous alumina ceramics, which have both functional and structural properties, have been widely applied in the chemical industries, metallurgical industries, medical industries, and many other fields of engineering[1]. The various design and performance characteristics of porous alumina ceramics are principally concentrated about controlled porosity and pore-size, high strength, heat and corrosion resistance, durability, shock resistance, and good permeability. There are many techniques to fabricate porous alumina ceramics, but the majority of those need to add organic polymers as pore forming materials[2]. However, spark plasma sintering (SPS) is suggested to be effective on the fabrication of porous alumina ceramics because it makes possible sintering and bonding at low temperature and short time by charging the intervals between powder particles with electrical energy and effectively applying a high temperature spark plasma generated momentarily[3-5]. Compared with hot pressing (HP) sintering, porous alumina ceramics can be manufactured by SPS at lower heating temperature, short holding time without any addictive.

多孔氧化铝陶瓷，具有的功能和结构特性，已被广泛应用于化学工业，冶金工业，医疗业，以及其他许多领域工程[ 1 ]。各种设计和多孔氧化铝陶瓷的性能特点，主要集中在受控的孔隙率和孔径，高强度，耐热性和耐蚀性，耐久性，耐冲击性，和良好的渗透性。有许多技术制备多孔氧化铝陶瓷，但大多数人需要添加有机聚合物材