Development of multicomponent glasses for application as a glazing layer on dental zirconia

IF 2.1 3区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS
Albena Yoleva, Tina Tasheva, Stoyan Djambazov, Adriana Batsova
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Abstract

This study presents the development of multicomponent glasses for glaze layers for dental yttria‐stabilized tetragonal zirconia (Y‐TZP). The samples were melted in the temperature range of 1 250–1 400°C and were cast in water to obtain a frit. The frits were grounded to a powder with a particle size of less than 40 µm. To study the crystallization tendency of melted glasses, they were thermally treated at 800°C and X‐ray diffraction analyses were performed for both types of samples. The structure of the glasses was investigated by the Fourier‐transform infrared spectroscopy. The thermal expansion coefficient, CTE, the glass‐transition temperature, Tg, and the softening temperature, Ts, were defined. To test the glaze layer on zirconia ceramic, glass powders with different compositions were mixed with modeling fluid and applied on zirconia specimens and then fired at 800°C in a vacuum dental furnace. Scanning electron microscopy, SEM, was used to observe a cross‐section of the glass–ceramic contact on a glazed zirconia ceramic specimen. Glass with the highest content of alkaline oxides is characterized by the closest CTE to zirconium ceramics (10.10−6 K−1), the greatest transparency and good fluidity, and shows good adhesion to the zirconia. The glaze layer is homogeneous without cracks, pores, and crystals.
开发应用于牙科氧化锆上釉层的多组分玻璃
本研究介绍了用于牙科钇稳定四方氧化锆(Y-TZP)釉层的多组分玻璃的开发情况。样品在 1250-1400°C 的温度范围内熔化,并在水中浇铸以获得熔块。将熔块研磨成粒径小于 40 µm 的粉末。为了研究熔化玻璃的结晶趋势,将它们在 800°C 下进行了热处理,并对两种样品进行了 X 射线衍射分析。傅立叶变换红外光谱分析了玻璃的结构。确定了热膨胀系数(CTE)、玻璃转变温度(Tg)和软化温度(Ts)。为了测试氧化锆陶瓷上的釉层,将不同成分的玻璃粉与模型液混合后涂在氧化锆试样上,然后在真空牙科炉中以 800°C 煅烧。使用扫描电子显微镜(SEM)观察上釉氧化锆陶瓷试样上玻璃-陶瓷接触的横截面。碱性氧化物含量最高的玻璃具有与锆陶瓷最接近的热膨胀系数(10.10-6 K-1)、最大的透明度和良好的流动性,并且与氧化锆具有良好的粘附性。釉层均匀,无裂纹、气孔和晶体。
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来源期刊
International Journal of Applied Glass Science
International Journal of Applied Glass Science MATERIALS SCIENCE, CERAMICS-
CiteScore
4.50
自引率
9.50%
发文量
73
审稿时长
>12 weeks
期刊介绍: The International Journal of Applied Glass Science (IJAGS) endeavors to be an indispensable source of information dealing with the application of glass science and engineering across the entire materials spectrum. Through the solicitation, editing, and publishing of cutting-edge peer-reviewed papers, IJAGS will be a highly respected and enduring chronicle of major advances in applied glass science throughout this century. It will be of critical value to the work of scientists, engineers, educators, students, and organizations involved in the research, manufacture and utilization of the material glass. Guided by an International Advisory Board, IJAGS will focus on topical issue themes that broadly encompass the advanced description, application, modeling, manufacture, and experimental investigation of glass.
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