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氧化锆陶瓷的湿法成型和烧结行为研究

时间:2020-10-16 17:15来源:毕业论文
以掺杂氧化钇改性的氧化锆粉体为研究对象,对陶瓷的湿法成型(主要是注浆成型法)的条件工艺进行了研究。经过对分散剂种类、用量以及固含量的研究对比之后发现:当分散剂选用

摘要在现在的社会中,对于陶瓷的研究已经到了一定程度,在各个方面都能看到陶瓷的身影,由此可以看到陶瓷的各种功能正在被人们挖掘。本文中以掺杂氧化钇改性的氧化锆粉体为研究对象,对陶瓷的湿法成型(主要是注浆成型法)的条件工艺进行了研究。经过对分散剂种类、用量以及固含量的研究对比之后发现:当分散剂选用PVP的时候效果较好,PAA的容易沉降,得到的浆料不适合用于注浆;分散剂的含量在0.5%时最佳,当分散剂的含量升高或者降低的时候浆料都容易发生沉积或者在侧壁上粘附;然后本实验中研究了氧化锆固含量对于陶瓷浆料流动性的影响,当固含量为20%的情况下时流动性最佳,适合注浆,当继续提高固含量到25%的时候,浆料变得浓稠不适合用于注浆。然后通过调节排胶制度,烧结温度,烧结时间来进行对比研究后发现:退火排胶的时候升温速率较慢的烧结出的密度和线收缩率更好;烧结温度为1450℃时候密度最高,线收缩率也能达到20.19%,金相显微图也最好;烧结时间为5h时烧结出的密度和线收缩率也是最高的。58124

毕业论文关键词:ZrO2;湿法成型;注浆成型;烧结制度

Abstract In today's society, for the study of ceramics has been to a certain extent, in all aspects can see the figure of the ceramic, which can see the various functions of ceramics are being excavated. In this paper, the condition of the wet forming process (mainly the injection molding method) is studied. After the dispersant type and amount and solid content of the comparative study found: when dispersing agent used PVP time effect is good, PAA easy settlement, obtained by slurry is not suitable for grouting for; dispersing agent content in 0.5% best when dispersing agent content increased or decreased when slurry are prone to adhesion of deposits, or on the side wall; then the experiment studied zirconia solid content for the influence of ceramic slurry fluidity, when the solid content is 20% of the flow is best for grouting, when continue to improve solid content to 25% when the slurry becomes thick, not suitable for grouting. And then by adjusting the exhaust system glue, sintering temperature, sintering time to comparative study found that annealing line glue when heating rate is slower for sintering density and linear shrinkage rate is better; sintering temperature for the 1450 DEG C when the highest density, linear shrinkage rate can reached 20.19%, metallographic micrograph was the best; sintering time for 5h and the sintered density and linear shrinkage rate is the highest.

Keywords:ZrO2;wet moulding;Slip Casting;sintering system

 目录

摘要 1

一.绪论 3

1.1研究背景 3

1.2氧化锆陶瓷综述 4

1.3二氧化锆陶瓷成型工艺 5

1.3.1干法成型 5

3.1.1干压成型 5

1.3.2湿法成型 6

1.4氧化锆陶瓷的烧结 7

1.5二氧化锆的主要应用 8

1.6选题的目的以及研究内容 9

1.6.1选题的目的和意义 9

1.6.2选题的主要研究内容 9

    1.7本章小结 9

二.实验方案 10

2.1实验原料和仪器 10

2.2溶剂的选择 氧化锆陶瓷的湿法成型和烧结行为研究:http://www.lwfree.com/cailiao/lunwen_63080.html

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