CAJ | 학술논문

在氮气保护下由钼电阻炉中加热(1550~1580℃)制得 Y-Al-Si-O-N-F 氧氟氮基础玻璃.采用差示扫描量热法(DSC)测定玻璃的玻璃转变温度(tg)和析晶峰温度(tc).利用 XRD 结合能谱分析(EDS)鉴定氧氟氮微晶玻璃中的物相,采用扫描电子显微镜(SEM)观察微晶玻璃样品的微观形貌.结果表明:F 含量的增加降低玻璃的 tg 和 tc,并影响微晶玻璃的微观结构以及晶体的尺寸和形貌;N 含量的增加对析出晶相和微观结构产生较大影响;基础玻璃样品热处理后析出的主晶相为 Y2Si2O7,次晶相随 N 含量的提高由莫来石(Al6Si2O13)转变成 Si3Al6O12N2.与基础玻璃相比,微晶玻璃的显微硬度和抗弯强度有一定程度的提高.
재담기보호하유목전조로중가열(1550~1580℃)제득 Y-Al-Si-O-N-F 양불담기출파리.채용차시소묘량열법(DSC)측정파리적파리전변온도(tg)화석정봉온도(tc).이용 XRD 결합능보분석(EDS)감정양불담미정파리중적물상,채용소묘전자현미경(SEM)관찰미정파리양품적미관형모.결과표명:F 함량적증가강저파리적 tg 화 tc,병영향미정파리적미관결구이급정체적척촌화형모;N 함량적증가대석출정상화미관결구산생교대영향;기출파리양품열처리후석출적주정상위 Y2Si2O7,차정상수 N 함량적제고유막래석(Al6Si2O13)전변성 Si3Al6O12N2.여기출파리상비,미정파리적현미경도화항만강도유일정정도적제고.
@@@@Y-Al-Si-O-N-F oxyfluoronitride glasses were prepared by melting batches at 1 550?1 580 ℃ under N2 atmosphere in a Si-Mo-heated resistance furnace. Differential scanning calorimeter (DSC) was used to determine the glass transition temperature (tg) and crystallization temperature (tc). Crystalline phases in the oxyfluoronitride glass-ceramics were identified by X-ray diffractometry (XRD) and energy dispersion spectrometry (EDS). The microstructures of the glass-ceramics were observed by scanning electron microscopy (SEM). The results show that the addition of fluorine lowers the tg and tc of oxyfluoronitride glasses and affects the microstructures, including crystal size and morphology. Nitrogen affects the crystallization phases and microstructures. Y2Si2O7 appears as the major crystalline phase in all glass-ceramics obtained after heat treatment, and an increase in nitrogen content favors the formation of Si3Al6O12N2 rather than mullite (Al6Si2O13). The glass-ceramics exhibit higher microhardness and bending strength compared with the corresponding glasses with different fluorine or nitrogen contents.