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San Jose Delta

San Jose Delta

Ceramic Production and Machining

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    • Alumina Ceramic
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      • Strength
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Beryllium Oxide Machining and Grinding

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San Jose Delta maintains an extensive in-house inventory of certified Materion beryllia ceramic machining stock, including BW-1000, a higher strength and finer grain berylia,. While the grinding of beryllium oxide requires stringent dust control during the grinding process (see health and safety below) it otherwise machines like other technical ceramics of the similar density and grain size. Intricate design features are no more or less difficult than other materials such as alumina or aluminum nitride-AlN and delivery times are similar as well.

Whatever your production need; “Contact us”. 

Material PropertyQualified ValueTest Method
Thermal Conductivity0.7 to 0.9 cal/sec℃ cm. (At 38°C)ASTM-C408-82
Specific Heat0.25 cal/℃ gm. (25℃)ASTM-C351-82
Thermal Expansion9.0 x 106 in/in℃ (25℃ to 1000°C)ASTM-C539-84
Density2.85 gm/cc, min.ASTM-C373-82
Hardness60 on Rockwell 45NASTM-E1 8-84
Impenetrability, LiquidImperviousASTM-D1 16-81
Impenetrability, GasImperviousHelium Detecting Mass Spectrograph
Set at 10-8 atm. cc/sec.
Average Grain Size20 micronsLinear Intercept with factor 1.27
Flexural Strength35,000 psiASTM-D2442-85
Tensile Strength20,000 psiASTM-D651
-84
Compressive Strength225,000 psiASTM-C773-82
Young's Modulus50,000,000
psi
ASTM-C623-81
Shear Modulus25,000,000
psi
ASTM-C623-81
Poisson's Ratio0.26ASTM-C623-81
Dielecric Constant6.8 at 1 MHz
6.7 at 10 GHz
ASTM-D1 50-81
ASTM-D2520-81
Dissipation Factor.0003 at 2 MHz
.0004 at 10 GHz
ASTM-D1 50-81
ASTM-D2520-81
Resistivity1015 ohm-cmASTM-D257-93
Dielectric Strength300 volts/mil (.125" thick)ASTM-D1 49-81
ColorWhiteVisual
Impact Resistance6in.-lbs.ASTM-D256-R83
Maximum Continuous Use Temperature1800°C 
Surface finish; As Fired:10-20 microinchesDektak II
As Lapped:5 microinches, min.Dektak II
As Ground:To customer spec.Dektak II
Metallic ImpurityAverage PPMMetallic ImpurityAverage PPM
Ag1Li2
Al100Mg1000
B2Mn5
Ca50Mo2
Co1Na20
Cr10Ni5
Cu5Pb1
Fe35Si1700
K30Ti10
    Zn10

Health and Safety

Handling beryllium oxide ceramics in solid form poses no special health risk. Like many industrial materials, beryllium-containing materials may pose a health risk if recommended safe handling practices are not followed. Inhalation of airborne beryllium may cause a serious lung disorder in susceptible individuals. The Occupational Safety and Health Administration (OSHA) has set mandatory limits on occupational respiratory exposures. Read and follow the guidance in the Material Safety Data Sheet (MSDS) before working with this material. For additional information on safe handling practices on beryllium oxide ceramics, contact San Jose Delta at 408-727-1448.

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San Jose Delta Associates
482 Sapena Court
Santa Clara, CA 95054
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  • Alumina Ceramic
  • Aluminum Nitride
  • Beryllium Oxide
  • MACOR®
  • Sapphire
  • Silicon Nitride
  • Quartz
  • Zirconia

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