本文選題：溶膠凝膠法 + 低溫陶瓷結(jié)合劑　； 參考：《河南工業(yè)大學》2017年碩士論文

【摘要】：陶瓷結(jié)合劑用玻璃料制備方法有高溫熔融法,燒結(jié)法,高分子網(wǎng)絡(luò)凝膠法和溶膠-凝膠法。傳統(tǒng)的低溫陶瓷結(jié)合劑用玻璃料是通過天然礦物和氧化物在高溫熔融而成,其缺點:消耗能源較大,得不到均相玻璃料,也會使一些較低熔點的物質(zhì)揮發(fā)掉。與傳統(tǒng)工藝相比,溶膠-凝膠法有眾多優(yōu)點:分子水平均勻混合,低溫即可進行反應,組分可定量控制,實驗設(shè)備簡單,易于操作。將溶膠凝膠技術(shù)應用于陶瓷結(jié)合劑制備是一種新的嘗試,為開發(fā)高性能結(jié)合劑提供一條道路。本課題在是在溶膠凝膠法制備ZnO-B2O3-Si O2系玻璃料的基礎(chǔ)上,引入堿金屬和堿土金屬氧化物(Li2O、Na2O、K2O、MgO、CaO),制備R-ZBS四元系玻璃料。首先對溶膠凝膠法制備LZBS工藝參數(shù)(催化劑種類、加水量、反應溫度、pH值)進行優(yōu)化;然后通過差熱分析、紅外光譜分析、XRD分析、SEM檢測對玻璃料進行表征,并分析其微觀結(jié)構(gòu)與性能;最后根據(jù)微觀結(jié)構(gòu)與性能選擇最優(yōu)氧化物種類以及加入量;又探討了燒成溫度對陶瓷磨具性能的影響,以及氧化物復合加入對陶瓷結(jié)合劑的影響。實驗研究表明:(1)基于溶膠凝膠法,選擇玻璃料配比Li2O:ZnO:B2O3:Si O2為3:27:10:60(LZBS-1),探討工藝參數(shù)對制備四元系玻璃料的影響,選擇出了最佳的工藝參數(shù)為:以鹽酸為催化劑,選擇pH的值為4.5,加水量(nH2O/n乙醇)為3.6,采用水浴加熱的溫度為40℃。(2)采用溶膠凝膠法成功制備出Li2O-ZnO-B2O3-SiO2、Na2O-ZnO-B2O3-SiO2、K2O-ZnO-B2O3-SiO2、MgO-ZnO-B2O3-SiO2、CaO-ZnO-B2O3-Si O2四元系玻璃料。通過結(jié)構(gòu)與性能的綜合分析,當Li2O加入量為50%(LZBS-5)時,結(jié)合劑的性能最佳,最大抗折強度為72.95MPa,流動性107%,熱膨脹系數(shù)為4.84×10-6(700℃),并且其耐火度為780℃。陶瓷磨具的最佳綜合性能:抗折強度為40.03MPa,洛氏硬度為52HRB,體積密度為2.20g/cm3,氣孔率為54.6%,此時燒成溫度為810℃(3)隨著Na2O的加入,結(jié)合劑的耐火度降低、流動性提高,但是抗折強度降低;通過分析,L5N3配比的結(jié)合劑的綜合性能最佳:抗折強度為56.27MPa,流動性為126%,此時結(jié)合劑的耐火度為750℃。
[Abstract]:The preparation methods of glass for ceramic binder include high temperature melting, sintering, polymer network gel and sol-gel. The traditional glass materials for low temperature ceramic binders are made by melting natural minerals and oxides at high temperature. Their disadvantages are that they consume more energy and do not get homogeneous glass materials, and they also make some substances with lower melting point volatilize. Compared with the traditional process, the sol-gel method has many advantages: homogeneous mixing at molecular level, reaction at low temperature, quantitative control of components, simple experimental equipment and easy operation. The application of sol-gel technology to the preparation of ceramic binders is a new attempt, which provides a way for the development of high performance binders. On the basis of preparation of ZnO-B2O3-Si O 2 system glass by sol-gel method, alkali metal and alkaline earth metal oxide Li _ 2O _ 2 Na _ 2O _ K _ 2O _ (K _ 2O) MgO _ (2) O _ (2) were introduced to prepare R-ZBS quaternary glass. The process parameters (type of catalyst, amount of water, reaction temperature and pH value) of LZBS prepared by sol-gel method were optimized firstly, and then the glass was characterized by differential thermal analysis and infrared spectroscopy. Finally, according to the microstructure and properties of ceramic abrasive, the effects of sintering temperature on the properties of ceramic abrasives and the effects of oxide composite addition on ceramic binder were discussed. The experimental results show that based on the sol-gel method, the ratio of Li2O:ZnO:B2O3:Si _ 2 to Li2O:ZnO:B2O3:Si _ 2 is 3: 27: 10: 10: 60 LZBS-1, and the influence of process parameters on the preparation of quaternary glass is discussed. The optimum process parameters are as follows: hydrochloric acid as catalyst. Li2O-ZnO-B2O3-SiO2Na2O-ZnO-B2O3-SiO22O-ZnO-B2O3-SiO2O3-SiO-B2O3-SiO2MgO-ZnO-B2O3-SiO2-CaO-ZnO-B2O3-SiO2-CaO-ZnO-B2O3-SiO2-SiO-ZnO-B2O3-SiO2O3-SiO-ZnO-B2O3-SiO2-ZnO-B2O3-SiO-ZnO-B2O3-SiO2O3-SiO-ZnO-B2O3-SiO-ZnO-B2O3-SiO2-ZnO-B2O3-SiO-ZnO-B2O3-SiO-ZnO-B2O3-SiO-ZnO-B2O3-SiO-ZnO-B2O3-SiO-ZnO-B2O3-@@ Through the comprehensive analysis of structure and properties, when the addition amount of Li2O is 50% LZBS-5, the properties of the binder are the best, the maximum flexural strength is 72.95 MPa, the fluidity is 107%, the coefficient of thermal expansion is 4.84 脳 10 ~ (-6) C ~ (700 鈩，

本文編號：1805179