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Effect of Fe_2O_3 on non-isothermal crystallization of CaO-MgO-Al_2O_3-SiO_2 glass 认领 引用 被引量:10
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作者 郁青春 燕春培 +3 位作者 邓勇 冯月斌 刘大春 杨斌 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第7期2279-2284,共6页
The crystallization behavior and kinetics of CaO-MgO-Al2O3 SiO2(CMAS) glass with the Fe2O3 content ranging from zero to 5%were investigated by differential scanning calorimetry(DSC).The structure and phase analyse... The crystallization behavior and kinetics of CaO-MgO-Al2O3 SiO2(CMAS) glass with the Fe2O3 content ranging from zero to 5%were investigated by differential scanning calorimetry(DSC).The structure and phase analyses were made by Fourier transform infrared spectroscopy(FT-IR) and X-ray diffraction(XRD).The experiment results show that the endothermic peak temperature about 760℃ is associated with transition and the exothermic peak temperature about 1000℃ is associated with crystallization.The crystallization peak temperature decreases with increasing the Fe203 content.The crystallization mechanism is changed from two-dimensional crystallization to one-dimensional growth,and the intensity of diopside peaks becomes stronger gradually.There is a saltation for the crystallization temperature with the addition of 0.5%Fe2O3 due to the decomposition of Fe2O3.Si-O-Si,O-Si-O and T-O-T(T=Si,Fe,Al) linkages are observed in Fe2O3-CaO-MgO-Al2O3-SiO2 glass. 展开更多
关键词 CaO-MgO-Al2O3-SiO2 glass Fe2O3 diopside crystallization kinetics
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P2O5对CaO-MgO-Al2O3-SiO2系微晶玻璃析晶的影响 认领 引用 被引量:14
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作者 田清波 徐丽娜 +2 位作者 岳雪涛 王修慧 高宏 《人工晶体学报》 EI CAS 北大核心 2008年第1期208-212,共5页
采用熔融法制备了不同P2O5含量的CaO-MgO-Al2O3-SiO2玻璃样品,研究了P2O5对该系微晶玻璃析晶的影响规律。结果表明:在所研究的CaO-MgO-Al2O3-SiO2玻璃中,P2O5的最大溶解量在10.0%质量分数左右,超过其饱和溶解度后将析出α-磷酸钙相。玻... 采用熔融法制备了不同P2O5含量的CaO-MgO-Al2O3-SiO2玻璃样品,研究了P2O5对该系微晶玻璃析晶的影响规律。结果表明:在所研究的CaO-MgO-Al2O3-SiO2玻璃中,P2O5的最大溶解量在10.0%质量分数左右,超过其饱和溶解度后将析出α-磷酸钙相。玻璃中添加4.0%质量分数P2O5时以表面析晶为主,析出晶体为钙长石和少量硅灰石。随着P2O5含量的提高,α-磷酸钙逐渐析出,同时钙长石和硅灰石的析出逐渐降低。进一步提高P2O5含量抑制了玻璃的表面析晶,促进了玻璃的分相和整体析晶。当P2O5的含量达到10%时,玻璃以整体析晶为主,在分相区内外区域析出晶体的形态非常相似,均呈现为细小粒状。 展开更多
关键词 微晶玻璃 五氧化二磷 析晶 CaO-MgO-Al2O3-SiO2玻璃
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CaO-MgO-Al_2O_3-SiO_2系微晶玻璃复合晶核剂的优化及其对结构与性能的影响 认领 引用 被引量:7
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作者 张雪峰 魏海燕 +3 位作者 欧阳顺利 贾晓林 赵鸣 夏经天 《人工晶体学报》 EI CAS CSCD 北大核心 2015年第7期1905-1911,共7页
以化学纯试剂CaO、MgO、Al2O3和SiO2为主要原料,采用熔融法制备添加复合晶核剂Cr2O3、Fe2O3和CaF2的CaO-MgO-Al2O3-SiO2(CMAS)系微晶玻璃。采用正交试验的方法,确定复合晶核剂的相对最优配方。利用DTA、XRD、SEM和综合力学性能仪等手段... 以化学纯试剂CaO、MgO、Al2O3和SiO2为主要原料,采用熔融法制备添加复合晶核剂Cr2O3、Fe2O3和CaF2的CaO-MgO-Al2O3-SiO2(CMAS)系微晶玻璃。采用正交试验的方法,确定复合晶核剂的相对最优配方。利用DTA、XRD、SEM和综合力学性能仪等手段,研究了复合晶核剂对该系微晶玻璃显微结构及性能的影响。结果表明,复合晶核剂的相对最优配方是Cr2O3、Fe2O3和CaF2的含量分别为0.5%、10%和8%,且复合晶核剂总含量的增加可以细化晶粒,随着晶粒细化,CMAS系微晶玻璃的维氏硬度增加。 展开更多
关键词 微晶玻璃 复合晶核剂 优化设计 CaO-MgO-Al2O3-SiO2
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CaO-MgO-Al_2O_3-SiO_2-P_2O_5-(F)微晶玻璃的析晶及特征 认领 引用 被引量:4
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作者 王玥 田清波 +2 位作者 岳雪涛 王修慧 高宏 《人工晶体学报》 EI CAS 北大核心 2007年第3期692-695,共4页
采用熔融法制备了不同P2O5及F含量的CaO-MgO-Al2O3-SiO2-P2O5-(F)基础玻璃试样,研究了CaO-MgO-Al2O3-SiO2-P2O5-(F)系微晶玻璃的析晶及特征。结果表明:在CaO-MgO-Al2O3-SiO2-8.0wt%P2O5玻璃中,表面析晶和内部析晶同时存在,析出晶体主要... 采用熔融法制备了不同P2O5及F含量的CaO-MgO-Al2O3-SiO2-P2O5-(F)基础玻璃试样,研究了CaO-MgO-Al2O3-SiO2-P2O5-(F)系微晶玻璃的析晶及特征。结果表明:在CaO-MgO-Al2O3-SiO2-8.0wt%P2O5玻璃中,表面析晶和内部析晶同时存在,析出晶体主要为钙长石(CaAl2Si2O8)相、硅灰石(CaSiO3)和α-磷酸钙(Ca3(PO4)2)。玻璃中P2O5含量的提高抑制玻璃的表面析晶,同时促进了玻璃的整体析晶和α-磷酸钙晶体析出。同时添加P2O5和F的玻璃试样以整体析晶为主,析出晶体为块状氟磷灰石和粒状钙长石相。 展开更多
关键词 生物微晶玻璃 α-磷酸钙晶体 氟磷灰石 CaO-MgO-Al2O3-SiO2-P2O5-(F)玻璃
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ZrO2对Li2O-Al2O3-B2O3微晶玻璃析晶行为及微波介电性能的影响 认领 引用
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作者 倪宇博 陈志斌 +8 位作者 曾广 罗琼 陈巧 刘佳 李文俊 邹澳琪 王静 田培静 韩建军 《硅酸盐通报》 CAS 北大核心 2026年第3期835-844,共10页
随着5G技术的推进,微波和毫米波频段器件对高性能介电材料的需求日益增长。本文以Li2O-Al2O3-B2O3(LAB)体系微晶玻璃为研究对象,采用低温共烧法制备了能在超低温下烧结致密且具有优异微波介电性能的微晶玻璃,并研究了外... 随着5G技术的推进,微波和毫米波频段器件对高性能介电材料的需求日益增长。本文以Li2O-Al2O3-B2O3(LAB)体系微晶玻璃为研究对象,采用低温共烧法制备了能在超低温下烧结致密且具有优异微波介电性能的微晶玻璃,并研究了外加ZrO2对LAB微晶玻璃析晶行为及微波介电性能的影响。结果表明:当ZrO2掺量从0.2%(摩尔分数,下同)增至0.8%时,LAB微晶玻璃主晶相为LiBO2,析出晶体种类和数量基本没有变化。微晶玻璃Avrami指数n为3.05~3.89,表明该体系的晶体生长机制主要为体析晶,ZrO2的引入降低了微晶玻璃的析晶活化能。随着ZrO2掺量的增加,LAB微晶玻璃显微结构中气孔增多,体积密度也因此而降低。当外加0.2%ZrO2时,Z1微晶玻璃在650℃下烧结7 h具备良好的微波介电性能,微波相对介电常数εr=7.5,品质因素Q×f=16958 GHz,该微晶玻璃是一种良好的超低温共烧陶瓷(ULTCC)候选材料。 展开更多
关键词 Li2O-Al2O3-B2O3微晶玻璃 超低温共烧陶瓷 ZrO2 微波介电性能 析晶活化能 微观结构
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热处理对CaO-MgO-Al_2O_3-SiO_2系微晶玻璃瓷砖釉面力学性能的影响 认领 引用 被引量:4
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作者 江自然 李明曦 +1 位作者 樊星 郑峰 《中国陶瓷》 CAS CSCD 北大核心 2011年第6期54-57,70,共4页
采用等离子体原子发射光谱分析(ICP-AES)、热分析(DSC)、X射线衍射分析(XRD)、维氏显微硬度测试和扫描电镜(SEM)分析研究热处理对合作单位博德精工提供的CaO-MgO-Al2O3-SiO2系微晶玻璃瓷砖釉面力学性能的影响,以期提高耐磨性能和优化热... 采用等离子体原子发射光谱分析(ICP-AES)、热分析(DSC)、X射线衍射分析(XRD)、维氏显微硬度测试和扫描电镜(SEM)分析研究热处理对合作单位博德精工提供的CaO-MgO-Al2O3-SiO2系微晶玻璃瓷砖釉面力学性能的影响,以期提高耐磨性能和优化热处理工艺。分别采用传统的两步法和一步法处理瓷砖釉面,结果表明,试样经过750℃保温120min—950℃保温90min和900℃保温2h处理后均析出透辉石、钡长石和氧化锆,大约能够使釉面硬度提高15%和13.6%。另外,试样经940℃保温5min处理后,发生氧化锆相变增韧,硬度提高约11.5%。考虑到工厂的生产实际,氧化锆相变增韧处理是提高瓷砖秞面力学性能的最佳热处理方式。 展开更多
关键词 CaO—MgO—Al2O3-SiO2系微晶玻璃 热处理 相变 力学性能
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CaO/MgO比对CaO-MgO-Al_2O_3-SiO_2系玻璃微晶化行为的影响 认领 引用 被引量:7
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作者 彭文琴 肖汉宁 《中国陶瓷》 CAS 2001年第2期20-22,共3页
采用DTA ,XRD ,SEM等测试分析手段研究了CaO/MgO比对CaO -MgO -Al2 O3 -SiO2 系玻璃微晶化行为的影响。结果表明 :在一定热处理制度下 ,可制备结构均匀致密、耐磨性极好的白色微晶陶瓷 ,其主晶相为硅灰石和透辉石 ;随着CaO/MgO比的降低 ... 采用DTA ,XRD ,SEM等测试分析手段研究了CaO/MgO比对CaO -MgO -Al2 O3 -SiO2 系玻璃微晶化行为的影响。结果表明 :在一定热处理制度下 ,可制备结构均匀致密、耐磨性极好的白色微晶陶瓷 ,其主晶相为硅灰石和透辉石 ;随着CaO/MgO比的降低 ,微晶陶瓷的晶化温度提高 ,透辉石型晶体含量增加 ,耐磨性提高。 展开更多
关键词 氧化钙 氧化镁 微晶化行为 微晶陶瓷 CaO-MgO-Al2O3-SiO2系玻璃
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Li_2O-Na_2O-K_2O-CaO-MgO-Al_2O_3-SiO_2系统乳浊釉的研究 认领 引用 被引量:1
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作者 滕元成 《硅酸盐通报》 CAS 2002年第6期9-12,共4页
对Li2 O Na2 O K2 O CaO MgO Al2 O3 SiO2 系统釉进行了较全面的正交试验研究 ,找到了影响该系统釉乳浊及釉面质量的主次因素 。
关键词 配方 正交试验 陶瓷釉 Li2O-Na2O-K2O-CaO-MgO-Al2O3-SiO2系统 乳浊釉 研究
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Na2O-Al2O3-SiO2微晶玻璃的研究进展 认领 引用
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作者 赵志龙 田雪洁 +3 位作者 周泽云 韩金龙 赵志永 田英良 《玻璃搪瓷与眼镜》 CAS 2025年第8期47-55,共9页
在Na2O-Al2O3-SiO2(NAS)微晶玻璃中,常见晶相除了霞石晶体(NaAlSiO4),还包含一些不含碱金属氧化物的晶相,这类晶相一定程度上可提高NAS微晶玻璃的力学性能,使其在光学、齿科、信息等领域具有潜在的应用价值。本文简要阐... 在Na2O-Al2O3-SiO2(NAS)微晶玻璃中,常见晶相除了霞石晶体(NaAlSiO4),还包含一些不含碱金属氧化物的晶相,这类晶相一定程度上可提高NAS微晶玻璃的力学性能,使其在光学、齿科、信息等领域具有潜在的应用价值。本文简要阐述了NAS微晶玻璃的研究进展,介绍了NAS微晶玻璃的主晶相和其他衍生晶相的结构,探讨了玻璃的网络形成体、网络修饰体和晶核剂对NAS微晶玻璃析晶行为及性能的影响。最后,展望了NAS微晶玻璃的应用方向。本文对今后NAS微晶玻璃的研究具有一定的参考价值。 展开更多
关键词 钠铝硅微晶玻璃 网络形成体 网络修饰体 晶核剂 钠霞石
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硅锰渣基CaO-MgO-Al_2O_3-SiO_2系矿渣微晶玻璃晶化性能研究 认领 引用 被引量:7
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作者 陈坤 柯昌明 张锦化 《武汉科技大学学报》 CAS 北大核心 2015年第5期346-350,共5页
以硅锰水淬渣为原料,添加石英砂对其成分进行调整,熔制出3种成分不同的硅锰渣基CaO-MgOAl2O3-SiO2系矿渣微晶玻璃,采用XRD、DSC、SEM对基础玻璃经不同温度热处理后的晶化特性进行研究。结果表明,随着原料中石英砂含量的增加,基础玻璃熔... 以硅锰水淬渣为原料,添加石英砂对其成分进行调整,熔制出3种成分不同的硅锰渣基CaO-MgOAl2O3-SiO2系矿渣微晶玻璃,采用XRD、DSC、SEM对基础玻璃经不同温度热处理后的晶化特性进行研究。结果表明,随着原料中石英砂含量的增加,基础玻璃熔制温度与晶化温度均有所提升;当SiO2加入量为10%时,熔制的基础玻璃晶化完善,其在900℃时经3h晶化处理后可析出大量叶片状的透辉石相和钙长石相。 展开更多
关键词 硅锰渣 CaO-MgO-Al2O3-SiO2 微晶玻璃 石英砂 晶化 钙长石 透辉石
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B2O3对Li2O-ZnO-Al2O3-SiO2微晶玻璃结构与析晶行为的影响 认领 引用
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作者 温中源 李路瑶 +1 位作者 王静 韩建军 《硅酸盐通报》 CAS 北大核心 2025年第12期4546-4556,4591,共11页
透明微晶玻璃因优异的光学性能与力学性能被广泛用于智能终端和穿戴领域,其性能与玻璃相中纳米晶的种类、含量、尺寸、分布等紧密相关。通过熔融-热处理法制备了Li2O-ZnO-Al2O3-SiO2(LZAS)透明微晶玻璃,研究了B2O3含... 透明微晶玻璃因优异的光学性能与力学性能被广泛用于智能终端和穿戴领域,其性能与玻璃相中纳米晶的种类、含量、尺寸、分布等紧密相关。通过熔融-热处理法制备了Li2O-ZnO-Al2O3-SiO2(LZAS)透明微晶玻璃,研究了B2O3含量对玻璃结构演化、析晶行为及性能的影响。结果表明,随着玻璃中B2O3含量从1%(摩尔分数,下同)增加到5%,玻璃内的[BO4]逐渐向[BO3]转变,并在B2O3含量为3%~5%时,[BO3]比例稳定在约49%。B2O3含量为1%~3%的玻璃在760℃晶化后倾向于表面析晶,B2O3含量不低于4%的玻璃在780℃晶化后,微晶玻璃内部析出分布均匀的球形晶体,增加B2O3含量降低了体析晶所需的晶化温度。其中,含4%B2O3的玻璃经760℃晶化后制得的微晶玻璃样品的透过率为65%,维氏硬度达到(6.77±0.07) GPa,弯曲强度为(172.7±8.1) MPa。 展开更多
关键词 B2O3 微晶玻璃 Li2O-ZnO-Al2O3-SiO2 β-石英固溶体 析晶动力学 维氏硬度
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Microstructure and microwave dielectric properties of CaO-B_2O_3-SiO_2 glass ceramics with various B_2O_3 contents 认领 引用 被引量:11
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作者 韦鹏飞 周洪庆 +2 位作者 朱海奎 戴斌 王杰 《Journal of Central South University》 SCIE EI CAS 2011年第5期1359-1364,共6页
The effects of B2O3 addition on both the sintering behavior and microwave dielectric properties of CaO-B2O3-SiO2 (CBS) glass ceramics were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diff... The effects of B2O3 addition on both the sintering behavior and microwave dielectric properties of CaO-B2O3-SiO2 (CBS) glass ceramics were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The results show that the increasing amount of B203 causes the increase of the contents of [BO3], [BO4] and [SiO4], which deduces the increase of CaB204 and a-SiO2 and the decrease of CaSiO3 correspondingly. No new phase is observed throughout the entire experiments. A bulk density of 2.54 g/cm3, a thermal expansion coefficient value of 11.95× 10-6 ℃-1 (20-500℃), a dielectric constant er value of 6.42 and a dielectric loss tanδ value of 0.000 9 (measured at 9.7 GHz) are obtained for CBS glass ceramics containing 35%-B203 (mass fraction) sintered at 850 ℃ for 15 min. 展开更多
关键词 CaO-B2O3-SiO2 B2O3 content Fourier transform infrared spectroscopy microstructure dielectric properties
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CaF2-CaO-MgO-Al_2O_3-SiO_2电渣渣系表面张力和渣-钢间界面张力的研究 认领 引用 被引量:8
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作者 于仁波 张祖贤 毛裕文 《钢铁研究学报》 CAS 北大核心 1989年第3期15-19,共5页
本文对CaF_2-CaO-MgO-Al_2O_3-SiO_2电渣渣系组成进行了炉渣密度、表面张力以及37CrNi3MoVA钢表面张力和渣-钢间界面张力的测量,讨论了不同组元对这些性质的影响。
关键词 界面张力 渣系 渣钢 表面质量 CaF2-CaO-MgO-Al2O3-SiO2 表面张力 表面性质 CaO 渣渣 MgO SiO Al
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CaO-MgO-Al_2O_3-SiO_2系统玻璃表面析晶的研究 认领 引用 被引量:7
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作者 陈璐 李素珍 《硅酸盐通报》 CAS 2003年第2期70-72,80,共3页
以浮选法黄金生产过程中排放的尾砂为主要原料 ,综合运用差热分析、X射线衍射、光学显微镜等测试手段 ,对CaO MgO Al2 O3 SiO2 系统玻璃的表面析晶行为及其动力学等内容进行了研究 ,其结果对进一步探索该系统玻璃粉末的烧结过程有一定... 以浮选法黄金生产过程中排放的尾砂为主要原料 ,综合运用差热分析、X射线衍射、光学显微镜等测试手段 ,对CaO MgO Al2 O3 SiO2 系统玻璃的表面析晶行为及其动力学等内容进行了研究 ,其结果对进一步探索该系统玻璃粉末的烧结过程有一定的指导作用 ,对于合理利用固体废弃物 。 展开更多
关键词 CaO-MgO-Al2O3-SiO2系统 玻璃 表面析晶 研究 尾砂 浮选法黄金
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Sintering,crystallization and dielectric properties of CaO-B_2O_3-SiO_2 system glass ceramics 认领 引用 被引量:3
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作者 戴斌 朱海奎 +2 位作者 周洪庆 许贵军 岳振星 《Journal of Central South University》 SCIE EI CAS 2012年第8期2101-2106,共6页
CaO-B203-SiO2 (CBS) glass powders are prepared by conventional glass melting method at different melting temperatures whose properties and microstructures are characterized by X-ray diffraction (XRD) and scanning ... CaO-B203-SiO2 (CBS) glass powders are prepared by conventional glass melting method at different melting temperatures whose properties and microstructures are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). It is found that there are SiO2 and some unknown phases in CBS glass melting liquid from 1 300 ℃ to 1 500 ℃ and the amount of these phases decreases with the increase of the melting temperature. The CBS glass melted at 1 450 ℃ could be sintered from 830 ℃ to 930 ℃ and the bulk densities of the samples are all higher than 2.4 g/cm^3. From the points of the properties and energy conservation, the melting temperature of 1 450 ℃ is the optimal melting temperature. The glass ceramic sintered at 850 ℃ exhibits better dielectric properties: er=6.33, tan6=2.2×10^-3 at 10 GHz, and the major phases of the samples are CaSiO3, CaB2O4 and SiO2. 展开更多
关键词 glass ceramics CaO-B2O3-SiO2 sintering dielectric properties microstructure
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Phase separation and crystallization of La2O3 doped ZnO-B2O3-SiO2 glass 认领 引用 被引量:2
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作者 Mitang Wang Long Fang +5 位作者 Mei Li Zhaogang Liu Yanhong Hu Xiaowei Zhang Wei Deng Ruhil Dongol 《Journal of Rare Earths》 SCIE EI CAS CSCD 2019年第7期767-772,共6页
In order to investigate the effect of the La2O3 on the phase separation and crystallization of ZnO-B2O3-SiO2 glass, after the occurence of the phase separation and crystallization of glasses by heat treatment, the mic... In order to investigate the effect of the La2O3 on the phase separation and crystallization of ZnO-B2O3-SiO2 glass, after the occurence of the phase separation and crystallization of glasses by heat treatment, the microstructure morphology and distribution of elements in different sample areas were characterized by the scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS);the non-isothermal crystallization kinetics of the glass samples was studied by using a differential scanning calorimeter(DSC) and the precipitated crystals of crystallized glass were determined by the X-ray diffraction(XRD). The results suggest that the phase separation and crystallization of 60ZnO-30 B2O3-10SiO2 glass occur at glass surface, and the incorporation of small amount(<4 mol%) of La2O3 significantly inhibits the glass phase separation and consequently improves the thermal stability of glass.Doping of La2O3 accelerates the glass crystallization at the elevated temperature(660 ℃), making the depth of crystal layer thicker and diffraction intensity in XRD patterns stronger. However, due to the precipitation of several crystals that occur simultaneously when La2O3 doping amount is 4 mol%, crystallization of the 60ZnO-30B2O3-10SiO2 glass is obviously depressed, the crystallization activation energy Ec and the relative crystallinity Xc of the glass reach the maximum and the minimum values, respectively.Although transition from one-dimensional growth of crystals to two-dimensional growth of crystals results from La2O3 addition, the one-dimensional growth of crystals remains dominant in crystallization process. This work can provide some useful information for preparing glass ceramics with nano-crystals precipitated in the glass surface. 展开更多
关键词 Zinc borosilicate glass La2O3 Phase separation Crystallization Rare earths
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Three-photon-excited fluorescence of Tb3+-doped CaO-Al_2O_3-SiO_2 glass by femtosecond laser irradiation 认领 引用 被引量:3
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作者 马红萍 祝邦文 邹凤楼 《Journal of Rare Earths》 SCIE EI CAS 2008年第6期928-931,共4页
A near infrared to visible blue, green, and red upconversion luminescence in a Tb^3+-doped CaO-Al2O3-SiO2 glass was studied, which was excited using 800 nm femtosecond laser irradiation. The upconversion luminescence... A near infrared to visible blue, green, and red upconversion luminescence in a Tb^3+-doped CaO-Al2O3-SiO2 glass was studied, which was excited using 800 nm femtosecond laser irradiation. The upconversion luminescence was attributed to ^5D3→^7F5, ^5D3→^7F4, ^5D3→^7F3, ^5D4→^7F6, ^5D4→^7F5, ^5D4→^7F4, and ^5D4→^7F3 transitions of Tb^3+. The relationship between upconversion luminescence intensity and the pump power indicated that a three-photon simultaneous absorption process was dominant in this upconversion luminescence. The intense red, green, and blue upconversion luminescence of Tb^3+-doped CaO-Al2O3-SiO2 glass may be potentially useful in developing three-dimensional display applications. 展开更多
关键词 three-photon-excited fluorescence three-dimensional (3D) volumetric display Tb^3+-doped CaO-Al2O3-SiO2 glass rare earths
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Preparation and Optical Properties of Er^3+:Na2O-Al2O3-SiO2 Transparent Glass-Ceramics 认领 引用 被引量:2
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作者 韦钦磊 张洪波 +5 位作者 ZOU Xiangyu CHEN Chen ZHAO Mengjie WEI Yanling SONG Qiong 苏春辉 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第1期37-41,共5页
Na2O-Al2O3-SiO2 glass-ceramics doped with Er^3+ ions were synthesized by the conventional melt quenching technique at a low melting temperature.The samples were characterized by differential scanning calorimetry(DSC... Na2O-Al2O3-SiO2 glass-ceramics doped with Er^3+ ions were synthesized by the conventional melt quenching technique at a low melting temperature.The samples were characterized by differential scanning calorimetry(DSC),X-ray diffraction(XRD),scanning electron microscopy(SEM),UV-vis-NIR scanning spectrophotometry,and fluorescence spectrometry.The results show that the main crystalline phase of glass-ceramics is nepheline.The best heat-treatment process is at 520 ℃ for 2 h.Because the up-conversion luminescence and near infrared luminescence properties of glass doped with Eu^3+ are studied in detail. 展开更多
关键词 Na2O-Al2O3-SiO2 Er^3+ ions glass-ceramics up-conversion&NIR luminescence
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Thermal Behavior and Lithium Ion Conductivity of L_2O-Al_2O_3-TiO_2-SiO_2-P_2O_5 Glass-ceramics 认领 引用 被引量:2
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作者 CHEN Hongping TAO Haizheng +1 位作者 WU Qide ZHAO Xiujian 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第1期67-72,共6页
A lithium ion conductive solid electrolyte, L20-AI203-TiO2-SiO2-P20s glass with NASICON- type structure have been synthesized and transformed into glass-ceramic through thermal-treatment at various temperatures from 7... A lithium ion conductive solid electrolyte, L20-AI203-TiO2-SiO2-P20s glass with NASICON- type structure have been synthesized and transformed into glass-ceramic through thermal-treatment at various temperatures from 700 to 1 000 ~C for 12 h. The differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and complex impedance techniques were employed to characterize the samples. The experimental results indicated that the capability of glass forming in this system is superior to that of L20-A1203-TiO2-PzO~. The glass has an amorphous structure and resultant glass-ceramic mainly consisting of LiTi2(PO4)3 phases. Impurity phases AIPO4, TiO2, TiP207 and unidentified phase were observed. With the enhanced heat-treatment temperature, grain grew gradually and lithium ion conductivity of glass-ceramics increased accordingly, the related impedance semicircles were depressed gradually and even disappeared, which could be analytically explained by the coordinate action of the 'Constant phase element' (CPE) model and the 'Concept of Mismatch and Relaxation' model (CMR). When the sample is devitrified at 1 000 ~C, the maximum room temperature lithium ion conductivity comes up to 4.1 x 10-4 S/cm, which is suitable for the application as an electrolyte of all-solid-state lithium batteries. 展开更多
关键词 inorganic solid electrolyte glass-ceramic L2O-A12O3-TiO2-SiO2-P2O5 system LiTi2(PO4)3phase
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Preparation,Structures,Thermal Properties and Sintering Behaviors of B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 Glass 认领 引用 被引量:4
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作者 丁阚俊杰 chen nan +1 位作者 杜国平 zhang aisheng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第6期1323-1328,共6页
B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 glass with different Al_2O_3 contents(1mol%, 3mol%, 5mol%, and 7mol%) was prepared, and it was intended to be used as lead-free and low-melting glass sealants for solid oxide fuel cells.... B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 glass with different Al_2O_3 contents(1mol%, 3mol%, 5mol%, and 7mol%) was prepared, and it was intended to be used as lead-free and low-melting glass sealants for solid oxide fuel cells. The effects of Al_2O_3 content on the structures, thermal properties, and sintering behaviors of the B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 glass were investigated in detail. The Al_2O_3 content largely influenced the structures and thermal properties of the glass. When the Al_2O_3 content 5mol%, the transition temperature of the glass decreased with the Al_2O_3 content, while the crystallization temperature increased with the Al_2O_3 content. However, higher Al_2O_3 content degraded the stability of the glass. The B_2O_3-SiO_2-ZnO-BaO-Al_2O_3 glass with 5 mol% Al_2O_3 content exhibits the optimal sintering densification characteristics and can be used as glass sealants for solid oxide fuel cells. 展开更多
关键词 B2O3-SiO2-ZnO-BaO-Al2O3 glass thermal properties sintering behavior densification crystallization
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