{"title":"THE INFLUENCE OF Cu, Ca AND Zn ON THE PROPERTIES OF METAPHOSPHATE GLASSES","authors":"Simona Brázdová","doi":"10.13168/cs.2023.0020","DOIUrl":null,"url":null,"abstract":"Metaphosphate glasses ZnaCu (1-a) (PO 3 ) 2 and Ca b Cu (1-b) (PO 3 ) 2 were prepared with the aim of studying the effect of different cations on solubility in water, on volume homogeneity and on the thickness of the surface layer. The relative ionicity of the Me-O(-P) bond (Me = Zn, Ca, and Cu) was determined using relative polarizability obtained by analyzing the Raman spectra. It was determined that the relative ionicity, i.e. the polarity of the bond, increases from the Cu donor-acceptor bond through the relatively covalently bound Ca to the significantly polar Zn bond. Compared to copper, both zinc and calcium reduce the compactness of the glass structure, of course to a different extent, and thus affect the coefficient of thermal expansion as well as the glass transition temperature. As can be expected, both from the relative ionicity and the effect on the compactness of the structure, the greatly increased solubility of glasses in water when replacing copper with calcium or zinc confirmed the reality of the conclusions about their influence on the properties of glasses. By dissolving glasses in water, the thicknesses of the surface layers were determined, which increases significantly from copper to calcium to zinc. Furthermore, phase segregation in the glass volume was identified.","PeriodicalId":9857,"journal":{"name":"Ceramics-silikaty","volume":"18 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics-silikaty","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.13168/cs.2023.0020","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 1
Abstract
Metaphosphate glasses ZnaCu (1-a) (PO 3 ) 2 and Ca b Cu (1-b) (PO 3 ) 2 were prepared with the aim of studying the effect of different cations on solubility in water, on volume homogeneity and on the thickness of the surface layer. The relative ionicity of the Me-O(-P) bond (Me = Zn, Ca, and Cu) was determined using relative polarizability obtained by analyzing the Raman spectra. It was determined that the relative ionicity, i.e. the polarity of the bond, increases from the Cu donor-acceptor bond through the relatively covalently bound Ca to the significantly polar Zn bond. Compared to copper, both zinc and calcium reduce the compactness of the glass structure, of course to a different extent, and thus affect the coefficient of thermal expansion as well as the glass transition temperature. As can be expected, both from the relative ionicity and the effect on the compactness of the structure, the greatly increased solubility of glasses in water when replacing copper with calcium or zinc confirmed the reality of the conclusions about their influence on the properties of glasses. By dissolving glasses in water, the thicknesses of the surface layers were determined, which increases significantly from copper to calcium to zinc. Furthermore, phase segregation in the glass volume was identified.
制备了偏磷酸盐玻璃ZnaCu (1-a) (po3) 2和Ca b Cu (1-b) (po3) 2,研究了不同阳离子对偏磷酸盐玻璃在水中的溶解度、体积均匀性和表层厚度的影响。利用拉曼光谱分析得到的相对极化率测定了Me- o (-P)键(Me = Zn, Ca和Cu)的相对离子性。结果表明,相对离子性,即键的极性,从Cu供体-受体键通过相对共价结合的Ca到极性显著的Zn键增加。与铜相比,锌和钙都降低了玻璃结构的致密性,当然程度不同,从而影响了热膨胀系数和玻璃化转变温度。可以预期的是,从相对离子性和对结构致密性的影响来看,当用钙或锌代替铜时,玻璃在水中的溶解度大大增加,证实了它们对玻璃性质影响的结论的真实性。通过将玻璃溶解在水中,确定了表面层的厚度,从铜到钙到锌,表面层的厚度显著增加。此外,还发现了玻璃体中的相偏析现象。
期刊介绍:
The journal Ceramics-Silikáty accepts papers concerned with the following ranges of material science:
Chemistry and physics of ceramics and glasses
Theoretical principles of their engineering including computing methods
Advanced technologies in the production of starting materials, glasses and ceramics
Properties and applications of modern materials
Special analytical procedures
Engineering ceramic including composites
Glass and ceramics for electronics and optoelectronics
High temperature superconducting materials
Materials based on cement or other inorganic binders
Materials for biological application
Advanced inorganic glasses with special properties
Fibrous materials Coatings and films based on inorganic non-metallic materials.