Crystallization behaviour and properties of BaO-CaO-B2O3-SiO2 glasses and glass-ceramics for LTCC applications

IF 5.6 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Haiyang Zhu , Renli Fu , Simeon Agathopoulos , Jun Fang , Guojun Li , Qinjiang He
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引用次数: 29

Abstract

The influence of BaO content (up to 15 mol%) on the crystallization behaviour, structure, thermal properties and microwave dielectric properties of the BaO-CaO-B2O3-SiO2 glasses and glass-ceramics system was investigated. The glasses were produced by melting at 1400 °C and quenching into water, and the glass-ceramics were produced via heat treatment at temperatures between 750 and 800 °C. The results of X-ray diffraction analysis showed that increasing the BaO content raised the resistance of the glass against crystallization and favoured the transformation of β-CaSiO3 and α-CaSiO3 phases, which crystallized in the Ba-free and in low BaO content compositions, into SiO2 and Ba4Si6O16, which crystallized in compositions with higher concentrations of BaO. The BaO content had little influence on the glass transition temperature (Tg) and the linear coefficient of thermal expansion (CTE), but strongly reduced the softening point (Ts). Even the addition of BaO as minor additives resulted in a dramatic reduction of the Ts; for example, the Ts decreased from 902 °C for the Ba-free composition to 682 °C for the BaO-containing one (5%). Low values of the dielectric constant (5.9 ≤ εr ≤ 6.63) and dielectric loss (1.12 × 10−3 ≤ tanδ ≤ 3.15 × 10−3) were measured.

LTCC用BaO-CaO-B2O3-SiO2玻璃和微晶玻璃的结晶行为和性能
研究了BaO含量(高达15 mol%)对BaO- cao - b2o3 - sio2玻璃和微晶玻璃体系结晶行为、结构、热性能和微波介电性能的影响。玻璃在1400 °C熔化后淬火到水中,玻璃陶瓷在750 ~ 800 °C的温度下热处理。x射线衍射分析结果表明,BaO含量的增加提高了玻璃的抗晶性,有利于β-CaSiO3和α-CaSiO3相在无ba和低BaO含量的成分中结晶向在BaO浓度较高的成分中结晶的SiO2和Ba4Si6O16相转变。BaO含量对玻璃化转变温度(Tg)和热膨胀线性系数(CTE)影响不大,但明显降低了软化点(Ts)。即使添加BaO作为少量添加剂,也会导致Ts的显著降低;例如,对于不含ba的组分,Ts从902 °C下降到682 °C,对于含bao的组分(5%)。低介电常数的值(5.9 ≤ εr≤6.63 )和介电损耗(1.12 × 10−3≤ tanδ ≤3.15  × 10−3)测量。
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来源期刊
Ceramics International
Ceramics International 工程技术-材料科学:硅酸盐
CiteScore
9.40
自引率
15.40%
发文量
4558
审稿时长
25 days
期刊介绍: Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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