optical ceramics brochure - surmet optical ceramics brochure.pdf · 2011. 3. 15. · optical...

For quotation contact: Surmet Corporation31 B Street, Burlington MA 01803

781-272-3969 phone781-272-9185 [email protected]

ALONALON®®

and Spinel Optical Ceramicsand Spinel Optical Ceramics

Surmet Corp. was founded in 1982 with a goal to become a commercial producer and supplier of differentiating products based on advanced metallic and ceramic materials technologies. Surmet became a leader in developing and manufacturing critical components such as the electrostatic clamp, for semiconductor processing equipment.

These Surmet products have been inserted in IC Fabrication production lines used by all major companies worldwide.

For defense markets, Surmet has developed weight efficient transparent armor technology based on our proprietary ALON®

optical ceramic material.

We have already proven that ALON®

transparent armor offers a lightweight solution to defeat a wide range of threats including

30calAPM2 and 50calAPM2. ALON®

transparent armor defeats these threats at about one-half the weight and thickness of current glass based transparent armor.

Surmet can manufacture and supply ALON®

transparent armor solutions for these ballistic threats. It is also noteworthy that Surmet is producing the ALON optical ceramic hard face material in thicknesses up to 1 in., this may enable scaling up our armor capability to efficiently defeat larger 12.7 mm, 14.5 mm and IED

threats.

Surmet is also developing infrared transmitting optical components for applications such as missile domes, reconnaissance windows, and laser windows.

We are supplying precision optics ceramic components to major Prime Contractors for insertion in production defense systems.

For interest in receiving a quote for specific armor products, please send your inquiry to [email protected].



About UsAbout Us

TECHNICAL DATA ALON®

Optical CeramicALON®Optical

Ceramic

is an extremely durable crystalline material with excellent optical transparency in the near ultraviolet, visible and infrared up to approximately 5 μm wavelength.

ALON®

Optical Ceramic is fabricated using a proprietary powder processing technique. The material combines mechanical and optical properties similar to sapphire with the advantages of an isotropic cubic crystal structure. It has an approximate composition of Al23

O27

N5.

ALON®

Optical Ceramic can be made to order as windows, domes, plates, rods and tubes in a wide range of sizes and thicknesses by a variety of conventional ceramic forming methods such as injection molding, isostatic pressing and slipcasting.

TYPICAL PROPERTIES OF ALON®

OPTICAL CERAMICComposition……………

Al23-1/3X

O27+X

N5-X(0.429<X<2)

Grain Size (typical)…....

150-250 micronsStructure………………..

Cubic, SpinelLattice Constant………..

7.956A –

7.936ADensity…………………

3.696 –

3.691 g/ccForm……………………

PolycrystallineMelting Point…………. 2150oCYoung’s Modulus……..

46.9x106

psiShear Modulus……….

18.9x106

psiPoisson’s Ratio……….

0.24Hardness………………

1850 Kg/mm2

(Knoop

Indentation, 200g load)Fracture Toughness……..

2.0 MPa-m1/2

Flexure Strength…………

55,000 psiSpecific Heat…………….

0.22 cal/g-oCThermal Conductivity

(cal/cm-s-oC)75oC……….

0.023270oC………

0.017540oC……….

0.015830oC……….

0.017Transmission Limits

0.22 to 6 microns

Index of Refractionλ(μm)

n 0.48

1.8030.50

1.8010.64

1.7900.68

1.7880.70

1.7871.00

1.7792.00

1.7613.00

1.7374.00

1.7025.00

1.653

Infrared Absorption Coefficient

λ(μm)

α

(cm-1) 3.8

0.0804.000

0.1594.230

0.2884.380

0.4094.545

0.5984.717

0.8494.902

1.2305.000

1.5985.102

2.0005.319

5.2305.550

8.0605.814

11.030

Dielectric PropertiesFreq.

k

tan δ(GHz)

(x10-5)35-45

9.190

3155-60

90181

6790-110

9.175

96

0

20

40

60

80

100

0 1 2 3 4 5 6

Wavelength (microns)

2 mm thick sample

Thermal Expansion Coeff.30-200oC

5.65x10-6

30-400oC

6.40x10-6

30-600oC

6.93x10-6

30-900oC

7.50x10-6



ALONALON®®

Composition……………

MgAl2

O4Form……………………

PolycrystallineLattice Constant………..

8.082 ÅDensity*1…………………

3.58 g/ccMelting Point*1…………. 2135oC

Grain Size (typical)….....

Bimodal, 25 um averageand 150 um average

Crystal Structure……….

Cubic, SpinelYoung’s Modulus*1……..

276 GPaPoisson’s Ratio*1………..

0.26

Thermal Expansion*1……

6.97 x 10-6

(30-200 C)Hardness*1………………

1650 kg/mm2

(Knoop Indentation, 200g load)Fracture Toughness*1……..

1.5 MPa-m1/2

Flexure Strength*1…………

170 MPaSpecific Heat*1…………….

0.8191 J/g -

°CThermal Conductivity*1…... 25 W/m-C @ 25°CTransmission Limits*1…….

0.25 to 6.5 micronsTypical Transmission…...

76% @ 0.65 um(@ 4 mm thickness)

83%

@ 1.064 um82%

@ 4.5 um

Ref. Index Homogeneity..

<5 x 10-6

over 3.0”

diameter(RMS)

<9 x 10-6

over 4.7”

diameter

*1-

Reference 1: Handbook of Optics Volume II ,McGraw Hill, Inc. (1995)

λ (um) η λ (um) η

0.404 1.7359 1.00 1.703

0.50 1.7230 2.40 1.6807

0.60 1.7155 3.00 1.6677

0.70 1.7108 4.00 1.6386

0.80 1.7075 5.00 1.598

Index of Refraction

Spinel Transmission

0

20

40

60

80

100

0 1 2 3 4 5 6 7

W avelength (um)

% T

rans

mis

sion

TECHNICAL DATA Spinel Optical Ceramic



Spinel Spinel

ALONALON

SapphireSapphire

SpinelSpinel

Spinel transmits out further than Sapphire, Spinel transmits out further than Sapphire, which transmits out further into the which transmits out further into the MWIR than ALONMWIR than ALON®®

Optical CeramicOptical Ceramic



Comparison of TransmissionComparison of Transmission(2 mm thick samples)(2 mm thick samples)

ALONALON®® and Spinel Optical Ceramics are made by and Spinel Optical Ceramics are made by conventional ceramic processing techniquesconventional ceramic processing techniques

For quotation contact:

Surmet Corporation31 B Street, Burlington MA 01803


Optical Ceramics Processing StepsOptical Ceramics Processing Steps

ALONALON®®

and Spinel can be made in large sizes and more and Spinel can be made in large sizes and more complicated geometries than Sapphirecomplicated geometries than Sapphire

ALON®

Hyper-Hemispherefor Counter-Manpads

Reconnaissance Window

Spinel Lens Spinel Tri-Mode Seeker Dome



ALONALON®®

and Spinel Optical Ceramics and Spinel Optical Ceramics IR Windows and DomesIR Windows and Domes

♦ Highest level of ballistic performance available♦ Specially formulated for armor applications♦ Can be cost effectively scaled to high volumes

UVAG-ALON blocks UV, which can break down organic layersin ballistic laminates



Armor GradeArmor GradeALONALON®®

Optical Ceramic (AGOptical Ceramic (AG--ALON)ALON)

HP_1HP_2 HP_3

AG_1 AG_2AG_3

HP Samples

AG Samples

HP_1HP_2 HP_3

AG_1 AG_2AG_3

HP Samples

AG Samples



Granite rock fired at ALON®

window

Foreign Object Damage ResistanceForeign Object Damage Resistance

ALON®

Laminates

Conventional Glass Laminate

50 cal API round stopped by thin ALON®

laminate

50 cal API round penetrates thick glass laminate

ALONALON®®

armor provides state of the art protection at half the weight armor provides state of the art protection at half the weight and thickness of conventional glass laminatesand thickness of conventional glass laminates



ALONALON®®

Transparent ArmorTransparent ArmorDefeats 50 Cal AP ThreatsDefeats 50 Cal AP Threats

Tiled ALONTiled ALON®®

windows provide excellent ballistic performancewindows provide excellent ballistic performanceEngineered seams can be employed to minimize obscurationEngineered seams can be employed to minimize obscuration

30 cal AP 50 cal AP

Excellent multiExcellent multi--hit performance has been demonstratedhit performance has been demonstratedagainst 30 cal and 50 cal AP roundsagainst 30 cal and 50 cal AP rounds



Tiled ALONTiled ALON®®

Armor WindowsArmor Windows

optical ceramics brochure - surmet optical ceramics brochure.pdf · 2011. 3. 15. · optical...

Documents