發(fā)布時(shí)間：2018-02-24 07:26

  本文關(guān)鍵詞： 硼硅酸鋁纖維 燒結(jié)溫度 微觀結(jié)構(gòu) 相轉(zhuǎn)變 單絲拉伸強(qiáng)度 彈性模量　出處：《硅酸鹽學(xué)報(bào)》2017年06期 　論文類型：期刊論文

【摘要】：以硝酸鋁、硼酸、次乙酸鋁和硅溶膠為原料,采用溶膠 凝膠法制備硼硅酸鋁纖維。借助于熱重 差熱分析、掃描電子顯微鏡、X射線衍射、透射電子顯微鏡、Fourier紅外光譜等分析手段,研究了燒結(jié)溫度對(duì)硼硅酸鋁纖維組織結(jié)構(gòu)與性能的影響。結(jié)果表明:當(dāng)燒結(jié)溫度從800℃升高到1 000℃時(shí),纖維的微觀結(jié)構(gòu)變得越來(lái)越致密,表面和斷口越來(lái)越光滑,物相由非晶態(tài)向Al_4B_2O_9相轉(zhuǎn)變,之后向Al_(18)B_4O_(33)相轉(zhuǎn)變,1 000℃燒結(jié)后,可得到致密、光滑、晶粒細(xì)小的纖維。當(dāng)燒結(jié)溫度從1 000℃繼續(xù)升高到1 300℃時(shí),晶粒長(zhǎng)大現(xiàn)象越來(lái)越明顯,經(jīng)1 200℃燒結(jié),纖維表面變得粗糙,斷口呈結(jié)晶狀形貌,經(jīng)1 300℃燒結(jié),晶粒長(zhǎng)大并趨于粉化,物相基本為Al_(18)B_4O_(33)相同時(shí)伴有少量Al_4B_2O_9相和莫來(lái)石相。纖維的平均單絲拉伸強(qiáng)度和彈性模量呈現(xiàn)先增后降變化趨勢(shì),1 000℃燒結(jié)后,拉伸強(qiáng)度和彈性模量達(dá)到最大值,分別約為1 300 MPa和138 GPa,且性能穩(wěn)定性好。
[Abstract]:Aluminium borosilicate fibers were prepared by sol-gel method using aluminum nitrate, boric acid, aluminium hypoacetate and silica sol as raw materials. By means of thermogravimetric differential thermal analysis (TGA), scanning electron microscopy (SEM) and X-ray diffraction (SEM), The effect of sintering temperature on the microstructure and properties of the fiber was studied by means of transmission electron microscope (TEM) and Fourier infrared spectroscopy (FTIR). The results showed that the sintering temperature increased from 800 鈩，

本文編號(hào)：1529379