全国性建材科技期刊一一《玻璃》2023年手第6期总第381期Na,O对MgO-ZnO-Al,O,-SiO,尖晶石微晶玻璃析晶及性能的影响InfluenceofNa,OContentonCrystallizationand张再莉白海涛手马铭宏黄永前(四川大学材料科学与工程学院成都610065)摘要通过熔融法制备了尖晶石相透明微晶玻璃。采用差示扫描量热仪(DSC)、X-射线衍射仪(XRD)、扫描电子显微镜(SEM)等测试方法,研究了Na,O含量的变化对MgO-ZnO-Al,O,-SiO,微晶玻璃析晶及力学性能的影响。结果表明,微晶玻璃的晶相均为尖晶石及氧化锆。Na,0的添加量为2%(摩尔分数)时微晶玻璃的晶粒最小,尺寸在20~35nm范围内。Na,0添加量为0、4%和6%时,微晶玻璃的粒度均增大。随着Na,0含量的增加,样品的显微硬度呈现逐渐降低的趋势;抗弯强度呈现先增高后降低的趋势,最高值为129MPa。关键词微晶玻璃;Na,O;尖晶石;性能中图分类号:TQ171文献标识码:A文章编号:1003-1987(2023)06-0012-07PropertiesofMgO-ZnO-Al,O,-SiO,SpinelPhaseGlass-ceramicsZHANGZaili,BAIHaitao,MAMinghong,HUANGYongqian(CollegeofMaterialScienceandEngineering,SichuanUniversity,Chengdu610065,China)Abstract:TransparentMgO-ZnO-Al,O,-SiO,microcrystallineglasseswithgoodpropertieswerepreparedbythemeltingmethod.TheeffectsofthevariationofNa,Ocontentontheprecrystallizationandmechanicalpropertiesofthespinel-phasemicrocrystallineglasseswereinvestigatedbyusingdifferentialscanningcalorimetry(DSC),X-raydiffractometry(XRD)andscanningelectronmicroscopy(SEM).Theresultsshowedthatthecrystallinephasesofthemicrocrystallineglasseswerespinelandzirconiumoxide,andthesmallestgrainsizewasintherangeof20~35nmat2%(molarfraction)ofNa,O,andthegrainsizeincreasedat0,4%and6%ofNa,O.ThemicrohardnessofthesamplestendedtodecreaseastheNa,Ocontentincreased,andtheflexuralstrengthtendedtoincreaseandthendecrease,withamaximumvalueof129MPa.KeyWords:glass-ceramics,Na,O,spinel,performance时具有较好的热稳定性【]。微晶玻璃在许多方面0引言都有广泛的应用,如平板显示器基板、集成线路微晶玻璃是由晶相和玻璃相组合而成的一种复合材料,在性能上可弥补玻璃由于缺陷而造成的断裂韧性低、硬度低、抗压强度小等缺点,同板、光学器件、牙科材料、炊具等[2.3]。尖晶石是一种AB,O,型的立方晶体结构...