Zinc Sulfide Ceramics for Infrared Optics

Johnson, Roy; Biswas, Papiya; Ramavath, Pandu; Mahajan, Y. R.

doi:10.1007/978-3-030-16347-1_16

Cited by 4 publications

(3 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At present, most of the polycrystalline zinc sulfide for optical elements of FLIR systems is produced by chemical vapor deposition (CVD) method 16 despite a very low deposition rate (50–100 (μm/h) extending the fabrication time 17 . In this research, the used polycrystalline ZnS was synthesized through the reaction between Zn vapor and H 2 S, which were fed in argon current to a heated platform at the deposition temperature of 650°C.…”

Section: Methodsmentioning

confidence: 99%

Micromechanics of impact damage of ductile (ZnS) and hard (MgAl₂O₄) ceramics

Chmel

Афанасьева

Dunaev

et al. 2021

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

The time‐resolved generation of the electromagnetic emission (EME) and acoustic emission (AE) excited by the point impact loading of ductile ZnS and hard MgAl2O4 ceramics was detected. It has been found that the EME generation precedes the AE activity in loaded ZnS ceramics, while the EME signal lags the AE generation from MgAl2O4. This dissimilarity of temporal patterns was explained by the difference between the mechanisms of the excitation of electrical charges in loaded ductile and hard ceramics. The EME from loaded ZnS is caused by the motion of charged dislocations, while, the EME effect in MgAl2O4 is due to the annihilation of opposite electric charges emerged on microcrack edges. The AE energy yield from growing microcracks in both ceramics as well as the EME activity in MgAl2O4 were found to be random (Poissonian‐like), which is typical of the localized fracture of solids occurring without long‐range interactions between perturbed structural localities. The energy distribution in EME time series generated in ductile ZnS prior to cracking followed a power law, which is characteristic for the correlated motion of charged dislocations at the stage of plastic flow. The temporal patterns of damage accumulation at different structural levels were specified through physical and mechanical properties of tested materials.

show abstract

Section: Methodsmentioning

confidence: 99%

Micromechanics of impact damage of ductile (ZnS) and hard (MgAl₂O₄) ceramics

Chmel

Афанасьева

Dunaev

et al. 2021

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…Commercial high purity multispectral zinc sulfide (MS-ZnS) prepared via chemical vapor deposition (CVD) has high thermal and optical performance for broadband applications [1][2][3][4]. However, the demand for broadband windows with improved durability [5,6] has resulted in varied research efforts aimed at designing and fabricating stronger materials.…”

Section: Introductionmentioning

confidence: 99%

Solute strengthening of multispectral ZnS windows by vapor transport of Ga2S3

Soufiani,

Kostogiannes,

Rivero-Baleine

et al. 2023

Window and Dome Technologies and Materials XVII

View full text Add to dashboard Cite

Multispectral zinc sulfide (MS-ZnS) is a gold-standard window material for applications requiring broadband transmission from the visible to the LWIR. This work investigates a vapor transport process to diffuse Ga2S3 into the subsurface of MS-ZnS and improve on the durability of this polycrystalline material. After solid-state diffusion, the presence of gallium in the host is confirmed by secondary ion mass spectroscopy and its concentration is quantified by x-ray diffraction. We show that, under optimized conditions, one can double the Vickers microhardness of MS-ZnS without precipitation of wurtzite and significant degradation of transmission.

show abstract

“…ZnS is highly transparent in the infrared region of the electromagnetic spectrum, particularly in the mid-wave infrared (MWIR) and longwave infrared (LWIR) ranges [1]. By applying hot isostatic pressing (HIP) process to chemical vapor deposited (CVD) ZnS, furthermore, micro scale polycrystalline structure becomes larger so that the transmittance in the visible wavelength is improved at the same time, so called multispectral (MS) ZnS, which makes it more useful in the visible-IR application [2]. This transparency allows it to transmit and manipulate both visible and infrared light effectively (Fig.…”

Section: Introductionmentioning

confidence: 99%

Crystallographic effect of elastic recovery on surface roughness of ultra-precision diamond turning machined polycrystalline ZnS

Kim,

Yeo,

Choi

et al. 2023

Optifab 2023

View full text Add to dashboard Cite

Polycrystalline zinc sulfide (ZnS) is a widely used optical material especially for infrared applications. After ultra-precision diamond turning (DT) machining of the material in ductile regime, surface roughness of a few nanometers is achievable. However, the traces of crystal structure were not only visible on the DT machined surface but it also showed the steep ups and downs on the surface profile, although the same depth-of-cut was applied to the whole surface. In this study, it was hypothesized that the ups and downs on the surface profile might be affected by the crystallographic orientation and elastic recovery of each grain on the surface of ultra-precision DT machined ZnS. The relationship between the crystallographic orientation and elastic recovery of the material was investigated using electron microscopy with electron back-scattered diffraction (EBSD) and nanoscale scratch tester. The results showed certain grain orientations exhibit higher levels of elastic recovery, leading to increased surface roughness. These results highlight the importance of considering crystallographic effects in the machining process of ZnS to achieve desired surface quality.

show abstract

Zinc Sulfide Ceramics for Infrared Optics

Cited by 4 publications

References 47 publications

Micromechanics of impact damage of ductile (ZnS) and hard (MgAl₂O₄) ceramics

Micromechanics of impact damage of ductile (ZnS) and hard (MgAl₂O₄) ceramics

Solute strengthening of multispectral ZnS windows by vapor transport of Ga2S3

Crystallographic effect of elastic recovery on surface roughness of ultra-precision diamond turning machined polycrystalline ZnS

Contact Info

Product

Resources

About

Zinc Sulfide Ceramics for Infrared Optics

Cited by 4 publications

References 47 publications

Micromechanics of impact damage of ductile (ZnS) and hard (MgAl2O4) ceramics

Micromechanics of impact damage of ductile (ZnS) and hard (MgAl2O4) ceramics

Solute strengthening of multispectral ZnS windows by vapor transport of Ga2S3

Crystallographic effect of elastic recovery on surface roughness of ultra-precision diamond turning machined polycrystalline ZnS

Contact Info

Product

Resources

About

Micromechanics of impact damage of ductile (ZnS) and hard (MgAl₂O₄) ceramics

Micromechanics of impact damage of ductile (ZnS) and hard (MgAl₂O₄) ceramics