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INFLUENCE OF THE ADDITIVE OF EUTECTIC COMPOSITION IN THE Li2O–B2O3 SYSTEM ON THE SINTERING PROCESS AND PROPERTIES OF CERAMICS BASED ON Li2MgTi3O8 Li2O-B2O3 体系中外加剂对基于 Li2MgTi3O8 的陶瓷的烧结过程和性能的影响
Pub Date : 2023-11-01 DOI: 10.14489/glc.2023.11.pp.003-009
V. D. Stolyarov, O. E. Shubabko, D. I. Vershinin
The influence of the eutectic additive of the Li2O–B2O3 system on the sintering process and dielectric properties of ceramics based on Li2MgTi3O8 has been investigated. It was determined that the introduction of an additive in the amount of 10.0 – 15.0 % contributes to the sintering of ceramics by a liquid-phase mechanism. Li2MgTi3O8 ceramics, containing a sintering additive in an amount of 15.0 % and obtained at a firing temperature of 900 ?С, demonstrates the following level of properties ?av = 3.04 g/cm3, Po = 5.7 %, ?r = 19.0 and tg? = 0.028. The lowered sintering temperature of ceramic will allow the production of various electronic components based on it using low-temperature cofiring ceramic (LTCC) technology, and the specified level of dielectric properties will allow to miniaturize the devices.
研究了 Li2O-B2O3 系统共晶添加剂对基于 Li2MgTi3O8 的陶瓷的烧结过程和介电性能的影响。结果表明,添加 10.0 - 15.0 % 的添加剂可通过液相机制促进陶瓷的烧结。含有 15.0 % 烧结添加剂的 Li2MgTi3O8 陶瓷在烧结温度为 900 ℃ 的条件下获得了以下性能:av = 3.04 g/cm3、Po = 5.7 %、r = 19.0 和 tg = 0.028。陶瓷烧结温度降低后,就可以利用低温共烧陶瓷(LTCC)技术生产基于陶瓷的各种电子元件。
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引用次数: 0
INFLUENCE OF YAG CERAMIC POWDERS GRINDING CONDITIONS OF ON THE PROPERTIES OF OPTICAL CERAMICS yag 陶瓷粉研磨条件对光学陶瓷性能的影响
Pub Date : 2023-11-01 DOI: 10.14489/glc.2023.11.pp.035-046
V. E. Suprunchuk, A. A. Kravtsov, V. Lapin, V. Tarala, L. V. Tarala, E. V. Medyanik, F. Malyavin
In this study, the changes in the morphology and degree of agglomeration of both precursor powders and ceramic YAG powders under varying grinding conditions was considered. The effect of these parameters on the optical properties and structure of the ceramics was assessed. The YAG precursor powders were obtained through chemical co-precipitation. The morphology, size of agglomerates, and crystallites was evaluated using scanning electron microscopy, laser diffraction analysis, X-ray phase analysis, and Brunauer–Emmett–Teller gas adsorption. It was found that milling the YAG precursor powders allows for a reduction in the degree of agglomeration of the ceramic powders. It was discovered that optimal modes can be achieved at a mass ratio of grinding balls to precursor powder of 6.75/1 and a ratio of the mass of the grinding medium to the mass of the precursor powder of 4.5/1. These modes provide the necessary granulometric characteristics and the highest monodispersity. Therefore, it has been demonstrated that the use of an additional milling stage for powders synthesized by chemical precipitation, along with the selection of milling modes, can improve the properties of YAG optical ceramics.
本研究考虑了在不同研磨条件下前驱体粉末和 YAG 陶瓷粉末的形态和团聚程度的变化。评估了这些参数对陶瓷光学特性和结构的影响。YAG 前驱体粉末是通过化学共沉淀获得的。使用扫描电子显微镜、激光衍射分析、X 射线相分析和布鲁瑙尔-艾美特-泰勒气体吸附法对其形态、团聚体和结晶的大小进行了评估。研究发现,研磨 YAG 前驱体粉末可以降低陶瓷粉末的团聚程度。研究发现,在研磨球与前驱体粉末的质量比为 6.75/1 和研磨介质与前驱体粉末的质量比为 4.5/1 时,可以实现最佳模式。因此,通过化学沉淀法合成的粉末使用额外的研磨阶段以及研磨模式的选择,可以改善 YAG 光学陶瓷的性能。
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引用次数: 0
FIXATION OF THE OPTICAL FIBER IN THE CONNECTOR USING HYDROGEL 使用水凝胶将光纤固定在连接器中
Pub Date : 2023-11-01 DOI: 10.14489/glc.2023.11.pp.047-052
L. Zhikina, A. M. Minkin, M. Krasnovskikh, E. A. Yatsenko, A. Ketov
A method of fastening optical fiber in a quartz connector with a sodium polysilicate hydrogel obtained in a cylindrical gap between the connector and the fiber due to the alkaline decomposition of quartz surfaces of parts was developed. The conditions of thermal decomposition of the hydrogel are determined and it is shown that the decomposition of the hydrogel with the formation of a cellular structure is possible at temperatures below the temperature of thermal decomposition of the polymer coating of the fiber. The conditions for obtaining and thermal properties of the hydrogel are determined. Conclusions are drawn about the suitability of the proposed method for fixing optical fiber in a quartz connector.
开发了一种将光纤固定在石英连接器中的方法,连接器和光纤之间的圆柱形间隙中含有一种聚硅酸钠水凝胶,这种水凝胶是由于零件石英表面的碱性分解而产生的。确定了水凝胶的热分解条件,并表明水凝胶的分解和蜂窝结构的形成在低于纤维聚合物涂层的热分解温度下是可能的。确定了获得水凝胶的条件和水凝胶的热特性。得出的结论是,所提议的方法适用于将光纤固定在石英连接器中。
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引用次数: 0
TRANSPARENT GLASS-CERAMICS BASED ON LITHIUM ALUMINOSILICATE SYSTEM 基于锂铝硅酸盐体系的透明玻璃陶瓷
Pub Date : 2023-11-01 DOI: 10.14489/glc.2023.11.pp.054-063
A. S. Naumov, V. Sigaev
Methods of laser micro- and nanomodification structure of transparent dielectrics open promising prospects for the creation of a new type glass-crystalline materials and new applications. In this work, after a brief excursion into the history of glass-ceramics, transparent aluminosilicate glass-ceramics are discussed, mainly using the example of the Li2O–Al2O3–SiO2 system, and the areas of their new applications. The recently discovered possibilities of laser micromodification of structures and direct laser writing of elements photonics and integrated optics in their volume are considered. In this case, special attention is paid to transparent glass-ceramics with coefficient of thermal expansion close to zero.
透明电介质的激光微纳米改性结构方法为创造新型玻璃晶体材料和新应用开辟了广阔的前景。本文在简要介绍了玻璃陶瓷的历史之后,主要以 Li2O-Al2O3-SiO2 系统为例,讨论了透明硅酸铝玻璃陶瓷及其新的应用领域。此外,还考虑了最近发现的激光微改性结构和在其体积中直接激光写入光电子学和集成光学元件的可能性。在这种情况下,特别关注热膨胀系数接近于零的透明玻璃陶瓷。
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引用次数: 0
CHARACTERISTICS AND MORPHOLOGY OF THE PORE SPACE OF SYNTHETIZED HIGHLY POROUS Sc2O3 CERAMIC MATERIALS 合成高孔隙率 Sc2O3 陶瓷材料孔隙的特性和形态
Pub Date : 2023-11-01 DOI: 10.14489/glc.2023.11.pp.026-034
R. Kapustin, V. I. Uvarov, A. O. Kirillov
An energy-efficient synthesis of highly porous ceramic materials based on Sc2O3 was carried out using a combination of compaction and technological combustion methods with the participation of active binders. Using XRD, SEM, and EDA methods, it was found that the material has a highly developed multilevel microstructure morphology based on Sc2O3 and tortveitite Sc2Si2O7. The main characteristics of the pore space of the material (porosity, pore size, specific surface area, permeability, etc.) were determined by mercury porosimetry and alternative methods.
在活性粘合剂的参与下,采用压实法和技术燃烧法相结合的方法合成了一种基于 Sc2O3 的高效节能多孔陶瓷材料。利用 XRD、SEM 和 EDA 方法发现,该材料具有高度发达的多层次微观结构形态,其基础是 Sc2O3 和凹凸棒石 Sc2Si2O7。材料孔隙空间的主要特征(孔隙率、孔径、比表面积、渗透性等)是通过汞孔测定法和其他方法确定的。
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引用次数: 0
INVESTIGATION OF THE KINETICS OF VACUUM SINTERING OF OPTICAL LUMINESCENT CERAMICS Y3-xScxA5O12:Cr 光致发光陶瓷 Y3-xScxA5O12:Cr 真空变细的动力学研究
Pub Date : 2023-11-01 DOI: 10.14489/glc.2023.11.pp.015-025
V. Lapin, V. E. Suprunchuk, V. Tarala, D. Vakalov, A. A. Kravtsov, F. Malyavin, L. V. Tarala, E. V. Medyanik, L. Kozhitov
The purpose of this work is to study the effect of scandium in the dodecahedral and octahedral positions of the garnet crystal lattice on the features of vacuum sintering of optical ceramics Y3-хScxAl2-yScyAl3O12:Cr, as well as on its optical and luminescent properties. YSAG:Cr optical luminescent ceramics were manufactured for the first time from ceramic powders of metastable compositions with a high scandium content in a dodecahedral position. The considered compositions were described by the general formula Y3-хScxAl2-yScyAl3O12, where 0,12 ? x ? 1,50 and 0,08 ? y ? 1,00 f. u. with a total scandium content from 0.12 to 1.70 f. u. The following studies of YSAG:Cr: ceramic samples were carried out: X-ray diffractometry, measurement of the shrinkage kinetics of ceramic compacts by dilatometry, study of the morphology and elemental composition of the ceramic surface by scanning electron microscopy (SEM). The light transmission and luminescence spectra were measured. It is shown that ceramics made from compositions with a predominant scandium content in the dodecahedral position reach maximum density at lower temperatures compared to compositions containing a greater amount of scandium in octahedral positions. It was found that with an increase in the sintering temperature of YSAG:Cr ceramics compositions with a high scandium content in the dodecahedral position become unstable.
这项工作的目的是研究石榴石晶格十二面体和八面体位置上的钪对真空烧结光学陶瓷 Y3-хScxAl2-yScyAl3O12:Cr 的特征及其光学和发光特性的影响。YSAG:Cr 光学发光陶瓷是首次从十二面体位置钪含量较高的可变成分陶瓷粉末中制造出来的。所考虑的成分用通式 Y3-хScxAl2-yScyAl3O12 描述,其中 0,12 ? x ?1,50 和 0,08 ?对 YSAG:Cr 陶瓷样品进行了以下研究:X 射线衍射测定法、通过膨胀测定法测量陶瓷压实物的收缩动力学、通过扫描电子显微镜(SEM)研究陶瓷表面的形态和元素组成。还测量了透光率和发光光谱。结果表明,与八面体位置钪含量较高的成分相比,十二面体位置钪含量占主导地位的成分制成的陶瓷在较低温度下就能达到最大密度。研究发现,随着 YSAG:Cr 陶瓷烧结温度的升高,十二面体位置钪含量高的成分变得不稳定。
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引用次数: 0
INVESTIGATION OF THE INFLUENCE OF YTTERBIUM OXIDE ON PHASE COMPOSITION AND SHS PARAMETERS OF COMPOSITIONS BASED ON SILICON NITRIDE 研究氧化镱对氮化硅基成分的相组成和嘶嘶声参数的影响
Pub Date : 2023-10-01 DOI: 10.14489/glc.2023.10.pp.021-025
I. A. Shibakov, V. V. Zakorzhevsky, I. D. Kovalev
Using the method of self-propagating high-temperature synthesis (SHS) SHS compositions based on the Si3N4–Yb2O3 system were obtained. Synthesis by combustion was carried out in a nitrogen atmosphere at a pressure of 4 MPa in a reactor with a volume of 30 liters. The mass of the loaded mixture was 3 kg. It has been established that the amount of ytterbium oxide in the charge affects the combustion temperature and the phase composition of the synthesis products. With an increase in the proportion of ytterbium oxide in the mixture, the content of the alpha phase decreases, and the secondary phases are represented by quaternary ytterbium-silicon oxynitride and ytterbium disilicate.
利用自蔓延高温合成(SHS)方法,获得了基于 Si3N4-Yb2O3 体系的 SHS 成分。燃烧合成在氮气环境中进行,压力为 4 兆帕,反应器容积为 30 升。装载混合物的质量为 3 千克。实验证明,装料中氧化镱的含量会影响燃烧温度和合成产物的相组成。随着混合物中氧化镱比例的增加,α相的含量减少,次生相为四氮化镱硅和二硅酸镱。
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引用次数: 0
NANOCRYTALLINE GLASS CERAMICS BASED ON PERLITE: SYNTHESIS AND RESEARCH 基于珍珠岩的纳米金刚石玻璃陶瓷:合成与研究
Pub Date : 2023-10-01 DOI: 10.14489/glc.2023.10.pp.039-047
S. G. Petrosyan, L. Grigoryan, P. Petrosyan
From a cheap perlite as the basic raw material an opaque glass-crystalline material was synthesized containing nanosized crystals of wollastonite and gehlenite with an average size of 100 nm. The phase composition, microstructure and strength properties of the material were investigated. Changes in the composition and size of crystal grains caused by varying the amount of catalyst and the content of quartz in the initial mixtures make it possible to control the physico-mechanical properties of the obtained material. High strength and hardness allow using this material for protection against high-speed impact, including small arms bullets.
以廉价的珍珠岩为基本原料,合成了一种不透明的玻璃晶体材料,其中含有平均尺寸为 100 纳米的硅灰石和海泡石的纳米级晶体。对材料的相组成、微观结构和强度特性进行了研究。通过改变催化剂的用量和初始混合物中石英的含量来改变晶体颗粒的组成和尺寸,从而可以控制所获得材料的物理机械性能。这种材料具有高强度和高硬度,可用于抵御高速冲击,包括小武器子弹。
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引用次数: 0
ENRICHMENT OF QUARTZ SANDS OF THE OYNAKUM DEPOSIT FOR SYNTHESIS OF HIGH-QUALITY TRANSPARENT GLASS 富集奥伊纳库姆矿床的石英砂以合成优质透明玻璃
Pub Date : 2023-10-01 DOI: 10.14489/glc.2023.10.pp.048-054
A. B. Anvarov, Z. R. Kadyrova
The article discusses the possibility of using quartz sands from the Oynakum deposit as a promising source of high-quality quartz-containing raw materials for the glass industry in order to obtain higher grades of glass. The chemical, granulometric and mineralogical composition of quartz sands of the Oynakum deposit was studied, high concentrations of quartz sand were obtained using various enrichment schemes.
文章讨论了利用奥伊纳库姆矿床的石英砂作为玻璃工业优质石英原料来源的可能性,以获得更高等级的玻璃。文章研究了奥伊纳库姆矿床石英砂的化学、粒度和矿物成分,并采用各种富集方案获得了高浓度的石英砂。
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引用次数: 0
HEAT-RESISTANT MULTIFUNCTIONAL COATING FOR THE PROTECTION OF CORROSION-RESISTANT STEEL PARTS 用于保护耐腐蚀钢件的耐热多功能涂层
Pub Date : 2023-10-01 DOI: 10.14489/glc.2023.10.pp.003-009
A. V. Zakalashniy, V. S. Denisova, O. V. Kulikova, A. Agarkov
A new heat-resistant multifunctional glass-based coating has been developed in the BaO–B2O3–SiO2 system, which protects parts made of corrosion-resistant steels from high-temperature gas corrosion at temperatures up to 900 ?C. The developed heat-resistant multifunctional coating has increased resistance to high temperatures, high dielectric properties, and therefore is multifunctional. A high level of properties is provided by a composition based on refractory glass and the addition of a bonding activator.
在 BaO-B2O3-SiO2 系统中开发出了一种新型耐热多功能玻璃基涂层,可在高达 900°C 的温度下保护耐腐蚀钢制成的部件免受高温气体腐蚀。所开发的耐热多功能涂层具有更强的耐高温性能和更高的介电性能,因此是一种多功能涂层。耐火玻璃成分和添加的粘合活化剂提供了高水平的性能。
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引用次数: 0
期刊
Steklo i Keramika
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