CAJ | 학술논문

以＜0.040 mm的熔融石英粉体为原料,以五氧化二磷、氧化钛、氧化铝、硼酸、氮化硅为添加剂,试样成型压强为50 MPa,试样经1200 ℃、1300 ℃、1400 ℃、1500 ℃分别保温1小时烧成,对烧后试样进行抗折强度、气孔率、热膨胀率、XRD、SEM的测定,研究添加剂种类与含量对熔融石英晶化与烧结性能的影响.试验结果表明:对于1300 ℃烧结后的试样,添加剂氧化铝、氮化硅的引入对熔融石英的晶化具有明显的抑制作用.引入氧化钛、氮化硅的熔融石英试样的抗折强度较高,具有较好的烧结性能.引入五氧化二磷的试样烧结程度差,该添加剂具有促进熔融石英晶化的作用.
이＜0.040 mm적용융석영분체위원료,이오양화이린、양화태、양화려、붕산、담화규위첨가제,시양성형압강위50 MPa,시양경1200 ℃、1300 ℃、1400 ℃、1500 ℃분별보온1소시소성,대소후시양진행항절강도、기공솔、열팽창솔、XRD、SEM적측정,연구첨가제충류여함량대용융석영정화여소결성능적영향.시험결과표명:대우1300 ℃소결후적시양,첨가제양화려、담화규적인입대용융석영적정화구유명현적억제작용.인입양화태、담화규적용융석영시양적항절강도교고,구유교호적소결성능.인입오양화이린적시양소결정도차,해첨가제구유촉진용융석영정화적작용.
Fused quartz granular (size＜40 μm) was used as raw material and phosphorous pentoxideBoric,titania,alumina,boracic acid,silicon nitride as additives.After being molded for 50 MPa and sintered at 1200 ℃,1300 ℃,1400 ℃,1500 ℃ for 1 h.Samples were tested in several aspects such as bending strength,apparent porosity,Thermal expansion rate (RT～1200 ℃),XRD and SEM.The effects of different additives and content on the sintering performances and crystallization of fused quartz are investigated.The results indicated that for samples sintered at 1300 ℃ for 1 h,effect of alumina or silicon nitride on inhibiting crystallization of fused quartz was obvious.Samples with titania or silicon nitride possess higher bending strength and sintering performances.Samples with phosphorous pentoxideBoric display lower sintering performances,the additive promote crystallization of fused quartz.