非金材081张渤 毕业论文 - 图文

河南科技大学毕业设计(论文)

烧结工艺和粘结剂对SiC网络结构陶瓷性能的影响

摘 要 碳化硅泡沫陶瓷具有气孔率高、热稳定性好等优良性能,被广泛用作金属

溶液过滤器、高温气体和离子交换过滤器、催化剂载体等.重点介绍了碳化硅泡沫陶瓷的种类,阐述了碳化硅泡沫陶瓷的制备方法和影响碳化硅泡沫陶瓷产品性能的因素,展望了碳化硅泡沫陶瓷的发展前景.

本文主要阐述了SiC基泡沫陶瓷的结构、性能、制造工艺和应用前景。使用了有机前驱体浸渍法制备SiC基泡沫陶瓷，通过比较在不同条件下（不同粘结剂含量和烧成温度保温时间）试样的常温耐压强度、热震稳定性、容重和孔隙率等性能参数，并用扫描电镜（SEM）对泡沫陶瓷显微结构进行了形貌分析，系统的分析实验条件对试样的影响。

实验结果表明：SiC基泡沫陶瓷在1450℃时的烧结保温3小时比保温2小时和4小时的热震次数多和抗压强度高；粘结剂的加入能够有效提高坯体的挂浆效果，较高温度烧结会导致烧结体产生大量玻璃相，降低其耐火度和高温强度，但是不利于SiC基泡沫陶瓷的综合性能参数。在1450°C保温3个小时粘结剂加入量为8%的SiC基泡沫陶瓷抗压强度为0.632MPa，900℃加热、20℃水急冷其热震次数高达16次。烧结温度为1450℃时制备的SiC基泡沫陶瓷过滤器具有较好的综合性能。

关键词：泡沫陶瓷，SiC，粘结剂，保温时间，抗热震性，抗压强度，

I

河南科技大学毕业设计(论文)

Sintering Process and Binder on the

sic-based Foam Ceramics

Abstract

Silicon carbide foam ceramic with good performance such as high porosity，excellent thermal stability，it is widely used as solution of metal filters，high-temperature gases and ion exchange filters，catalyst support, and so on. The type of silicon carbide foam ceramic are focused in this article, the preparation methods of silicon carbide foam ceramic and factors that affect the performance of silicon carbide foam ceramic product are introduced，and the silicon carbide foam cera-mic's prospects are expected.

This paper describes the structure of SiC-based ceramic foam, performance, manufacturing processes and applications. Organic precursor used in impregnation SiC-based ceramic foam, by comparing the different conditions (different binder content and sintered at different temperatures) samples at room temperature compressive strength, thermal shock stability, bulk density and porosity and other performance parameters And by scanning electron microscopy (SEM) on the microstructure of the ceramic foam morphology, systematic analysis of the impact of experimental conditions on the sample.

Experimental results show that: SiC-based ceramic foam sintered at 1450℃ and heat preservation time was 3h is better than heat preservation time was 2h and 4h than sintering thermal shock and high compressive strength more often; binder added to improve green body hanging plasma effect, high temperature sintering Will lead to a large amount of sintered glass phase, refractoriness and high temperature reduce the strength of SiC-based ceramic foam is not conducive to the comprehensive performance parameters. 1450℃ sintering binder prepared by adding 8% of the amount of compressive strength of SiC-based ceramic foam

II

河南科技大学毕业设计(论文)

0.632MPa, 900℃ heating, 20℃ water quench thermal shock up to 16 times. When the sintering temperature is 1450℃ SiC-based ceramic foam prepared filter has better overall performance.

KEY WORDS: Foam ceramic, SiC, binder, heat preservation time, thermal shock resistance, compressive strength

III

河南科技大学毕业设计(论文)

目 录

第一章 前 言 .................................................................................... 1

§1.1 泡沫陶瓷材料的简介 ............................ 1 §1.2 泡沫陶瓷的制备工艺 ............................ 1

§1.2.1发泡法 ........................................... 1 §1.2.2添加造孔剂法 ..................................... 2 §1.2.3凝胶注模法 ....................................... 2 §1.2.4有机泡沫浸渍法 ................................... 2

§1.3泡沫陶瓷的添加剂种类 .......................... 4

§1.3.1粘结剂 ........................................... 4 §1.3.2流变剂 ........................................... 4 §1.3.3分散剂 ........................................... 5 §1.3.4 消泡剂和表面活性剂 ............................... 5

§1.4 泡沫陶瓷的发展应用 ............................ 5 §1.5 本文研究内容、目的及意义 ...................... 6

§1.5.1 本文研究的主要内容 ............................... 6

第二章 试验过程 ............................................................................... 7

§2.1 试验原料 ...................................... 8 §2.2 试验方法 ...................................... 8 §2.3 试样的制备 .................................... 9

§2.3.1 实验基本配方 ..................................... 9 §2.3.2聚氨酯泡沫的选择和预处理 ......................... 9 §2.3.3 陶瓷浆料的制备 ................................... 9 §2.3.4 坯体的制备 ...................................... 10 §2.3.5烧成制度的制定 .................................. 12

§2.4 性能检测 ..................................... 12

§2.4.1热震性能的检测 .................................. 13 §2.4.2 泡沫陶瓷孔隙率和容重的测定 ..................... 13 §2.4.3扫描电镜形貌分析 ................................ 14

§2.5实验仪器 ..................................... 14

IV

河南科技大学毕业设计(论文)

第三章 结果与分析 .................................................................................... 16

§3.1试验设计方案 ................................. 16 §3.2试验所得数据 ................................. 16 §3.3 烧结温度对热震稳定性和抗压强度的影响 ......... 16 §3.5泡沫陶瓷的容重和孔隙率 ....................... 18 §3.6 粘结剂对sic基泡沫陶瓷性能影响 ............... 19 §3.7 SEM图像分析 ................................. 19 结 论 ................................................................................................ 20 参考文献 .......................................................................................... 22 致 谢 ................................................................................................ 24

V

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说综合文库非金材081张渤 毕业论文 - 图文在线全文阅读。