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Zinc Sulfide

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Zinc Sulfide

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ZnSe & ZnS
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Product description
Parameters

 Material: Zincsulfide

 Chemical formula: ZnS

 Relative molecular mass:97.44

 

 Traits

White to pale or pale yellow powder. See light color deepening. Steady in dry air, for a long time in the wet air or containing water, the gradual oxidation of zinc sulfate. Soluble in dilute inorganic acid, insoluble in water and alkaline solution. Relative density of 3.98 (α type), (d25) 4.102 (β type). Irritating.

 

 store

Sealed dry and protected from light.

 Use

Electronic vacuum coating. X-ray screen. Add trace amounts of radium or new thorium salt to the table for the luminous dial. TV screen. Paint the paint.

Index value of quality control information and quality control items

 

 Quality control items / Item index value

ZnS

≥95.0%

Fe

≤0.00002%

Cu

≤0.00002%

Pb

≤0.0001%

Ni

≤0.00002%

H2O

≤3.0%

 

CVD zinc sulfide is a chemically inert material, with high purity, insoluble in water, moderate density, easy processing and other characteristics, widely used in infrared windows, fairing and infrared optical components production. As with zinc selenide (ZnSe), zinc sulfide (ZnS) is also a material with good refractive index uniformity and good consistency. It has good image transmission performance in the 8000nm-12000nm wave band, and the material is also higher in the middle infrared band , But as the wavelength becomes shorter, absorption and scattering are enhanced. Compared with zinc selenide (ZNSE), zinc sulfide is low in price, high in hardness, twice as fast as zinc selenide, and is resistant to harsh environments. It is very suitable for use in the manufacture of  infrared window。

 Physicochemical property

 

CVD Zinc sulfide

Multispectral CVD Zinc sulfide

Density(g.cm-3@ 298k)

4.09

4.09

Specific resistance(Ω.Cm)

~1012

~101.3

Melting point(℃)

1827

 

Chemical purity(%)

99.9996

99.9996

Coefficient of thermal expansion(1/k)

6.6* 10-6@273k

6.3* 10-6@273k

 

7.3* 10-6@373k

7.0* 10-6@373k

Heat conductivity(J/k.m.s)

16.7@298k

27.2@298k

Calorific capacity(J/g.k)

0.469@298k

0.515@298k

knoop Hardness(kg/mm2)

200-235

160

Bending strength(Mpa)

103

 

Young modulus(Gpa)

74.5

74.5

Poisson ratio

0.29

0.28

 

 Optical property

 

CVD Zinc sulfide

Multispectral CVD Zinc sulfide

Wave length of transmittance scope

1000nm---14000nm

370nm—14000nm

Inhomogeneity of refractive index(Δn/n)

<7.3* 10-4@10600nm

<0.2* 10-4@632.8nm

Absorption coefficient(1/cm)

0.2  @ 10600nm

0.2 @10600nm

Thermo-optical coeffecient dn/dt(1/k,298-358k)

4.6* 10-5@1150nm

5.43* 10-5@632.8nm

4.3* 10-5@3390nm

4.21* 10-5@1150nm

4.1* 10-5@10600nm

3.87* 10-5@3390nm

 

 Variation of refractive index with the wave length

(CVD Zinc sulfide ZNS)20℃

Wave length(nm)

Refractive index(n)

Wave length(nm)

Refractive index(n)

620

2.355

9800

2.203

1000

2.292

10600

2.192

3800

2.253

11400

2.180

5000

2.246

12200

2.167

7000

2.232

13800

2.132

9000

2.212

14200

2.126

 

 Multispectral CVD Zinc sulfide(CLEARTRAN ZnS)20℃

Wave length(nm)

Refractive index(n)

Wave length(nm)

Refractive index(n)

400

2.545

8000

2.223

1010

2.292

9000

2.213

2060

2.264

10000

2.201

3500

2.255

11250

2.183

4500

2.250

12000

2.171

5000

2.247

13000

2.153

Technical requirements

Tolerance zone

Range of sizes

1-400mm

Dimensional tolerance

+0/-0.05mm

Angle tolerance

±2”-±5’´

Surface quality

40/20

Surface accuracy

λ/10 per @633nm

Chamfering of edge

0.1-0.5mm

Material

zinc sulfide

Coating film

8-14 microns or 3-5 microns and other wave bands

 

We could not find any corresponding parameters, please add them to the properties table
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 Luoyang Dingming Optical Technology Co.,Ltd.

Address:Hangong Road, Xigong Industrial Park, 
                   Xigong District, Luoyang HeNan,China

Email:lydm@dm-optical.com

Tel:+86-379-62110001

Fax:+86-379-62112223

 

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