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Beryllium Oxide Machining and Grinding


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”.

Beryllium Oxide Material Properties Data

Beryllium Oxide 99.5%
Material Property Qualified Value Test Method
Thermal Conductivity 0.7 to 0.9 cal/sec°C cm. (At 38°C) ASTM-C408-82
Specific Heat 0.25 cal/°C gm. (25°C) ASTM-C351-82
Thermal Expansion 9.0 x 106 in/in°C (25°C to 1000°C) ASTM-C539-84
Density 2.85 gm/cc, min. ASTM-C373-82
Hardness 60 on Rockwell 45N ASTM-E1 8-84
Impenetrability, Liquid Impervious ASTM-D1 16-81
Impenetrability, Gas Impervious Helium Detecting Mass Spectrograph Set at 10-8 atm. cc/sec.
Average Grain Size 20 microns Linear Intercept with factor 1.27
Flexural Strength 35,000 psi ASTM-D2442-85
Tensile Strength 20,000 psi ASTM-D651 -84
Compressive Strength 225,000 psi ASTM-C773-82
Young's Modulus 50,000,000 psi ASTM-C623-81
Shear Modulus 25,000,000 psi ASTM-C623-81
Poisson's Ratio 0.26 ASTM-C623-81
Dielecric Constant 6.8 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
Resistivity ohm-cm ASTM-D257-93
Dielectric Strength 300 volts/mil (.125" thick) ASTM-D1 49-81
Color White Visual
Impact Resistance 6in.-lbs. ASTM-D256-R83
Maximum Continuous Use Temperature 1800°C  
Surface finish; As Fired: 10-20 microinches Dektak II
As Lapped: 5 microinches, min. Dektak II
As Ground: To customer spec. Dektak II
 
Metallic Impurity
Average PPM
Metallic Impurity
Average PPM
Ag
1
Li
2
Al
100
Mg
1000
B
2
Mn
5
Ca
50
Mo
2
Co
1
Na
20
Cr
10
Ni
5
Cu
5
Pb
1
Fe
35
Si
1700
K
30
Ti
10
  
  
Zn
10

 

Beryllia Gas Laser Bores
 
San Jose Delta supplies custom designed ion laser plasma tubes with a "DRILLED" I.D. in lengths up to 24 inches.
 
We supply parts that are metalized and nickel plated ready for assembly or un-metalized for customers who want to do their own metalizing and plating or who use a glass fritting assembly process
 
 
The following are some Laser Bore Design/Tolerances Guidelines
 
   
Outside Diameter
+ .0005"
Overall Length
+ .001"
Center hole Diameter
+ .0005"
Center Hole Diameter Taper
.0003' max
Center Hole Straightness / Camber
.0002" per inch
Concentricity I.D. to O.D.
.001" max
Perpendicular - bore Centerline to ends
0.1% of O.D. / .002" max
Gas Return Holes Diameter
+ 1%
Gas Return Holes Bolt Circle
+ .030"
Surface Finish
32 $ RMS
 
 
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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482 Sapena Court, Santa Clara, California  95054
Fax: 408-727-6019, Email: sales@sanjosedelta.com.
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