Advanced and Functional Structured Ceramics: MgF2 and ZnS

Abstract

Due to difficulties in obtaining monomaterials, intensive research into the properties of ceramic compositions has been undertaken, along with developments to the properties of the compositions. These are not inferior to monomeric structures for a number of basic parameters. Among the different types of ceramics, magnesium fluoride and zinc sulfide occupy a special place due to their unique properties and specific applications. In this paper, we studied functional optoelectronics and modulating technique elements based on the advanced ceramics MgF2 and ZnS. The results of the transmittance spectral parameters and the contact angle estimation as well as an AFM analysis of the studied ceramics, both pure and structured with carbon nanotubes, are presented. We observed that the main characteristics of the studied materials with a surface modified by carbon nanotubes could be significantly changed when an innovative laser-oriented deposition method was applied. This method permitted the CNTs to be deposited in a vertical position on the material surface. The main features of the carbon nanotubes—such as the smaller value of the refractive index, the greater strength between the carbon atoms, and the effective surface—were taken into consideration. The analytical, quantum chemical, and experimental results of the studies of the changes in the basic physical parameters of the selected model of the inorganic matrices of the ceramics are given.

Спектральные свойства неорганических материалов группы фторидов щелочно-земельных металлов на примере наноструктурированного MgF-=SUB=-2-=/SUB=-

“…В качестве неорганической матрицы использовался MgF 2 , а в качестве покрытия были рассмотрены нанообъекты в виде одностенных нанотрубок. Следует упомянуть, что углеродные нанотрубки были осаждены на поверхность материала с использованием СО 2 -лазера с p-поляризованным излучением на длине волны 10.6 µm и мощностью 30 W [8]. При рассмотрении связи структуры УНТ/MgF 2 расчетные эффективные заряды составляют 1.294e для Mg ion и −0.826e для C ion .…”

“…Перераспределение заряда формирует новые энергетические уровни, что значительно влияет на оптические свойства материала. Это не противоречит данным по моделированию, полученным в работе [8].…”

“…Проанализировав наноструктурированную углеродными нанотрубками систему на примере MgF 2 и исследованные оптические характеристики, а затем сопоставив их с результатами работ [8][9][10][11], можно сделать следующие выводы.…”

Spectral properties of inorganic materials of the alkali-earth metal fluoride group on the example of nanostructured MgF-=SUB=-2-=/SUB=-

“…MgF 2 was used as an inorganic matrix, and nanoobjects in the form of single-walled nanotubes were considered as a coating. Mention that carbon nanotubes were deposited on the surface of the material using CO 2 laser with p-polarized radiation at a wavelength of 10.6 µm and a power of 30 W [8]. The proposed optical coating and optical element are a system consisting of a single CNT layer 100 nm thick, deposited in vacuum, and MgF 2 matrix substrate.…”

“…Moreover, nanostructured samples exhibit better microhardness. Indeed, after CNT deposition on the MgF 2 surface, the microhardness increases by 6% [8].…”