Machinable Ceramic - Physical Properties of Shapal-M Machinable Ceramic from Precision Ceramics

Precision Ceramics, a division of McGeoch Technology, is a company dedicated to the engineering of technical ceramics. From procurement and supply through to technical design and specialist machining, we offer a complete service.

Our reputation for quality and service is truly international with specialist ceramic components engineered by Precision Ceramics finding their way into an ever-widening array of worldwide applications in industries as diverse as aerospace, opto-electronics and nuclear power.

In both new applications and in areas where technical ceramics are already being used, Precision Ceramics has the necessary expertise and in-depth knowledge to quickly find the best way forward for any potential application from prototypes through to full-scale production of components. And once fully up and running, we can easily take the process one stage further by offering expert advice in the engineering of more demanding materials.

The company operates to the very highest quality standards and holds BS5750 Part 1, ISO9000 and BASEEFA approval.

Precision Ceramics is a Shapal Distributor. Precision Ceramics is a Shapal Expert. In fact, there is no other Shapal Supplier who knows more about this unique machinable ceramic than Precision Ceramics. We're simply experts in everything Shapal.

Shapal-M Machinable Ceramic Material

Shapal-M is a new type of machinable ceramic and combines a high thermal conductivity with a high mechanical strength with bending strengths of 30 kg/m. Shapal-M soft, in particular, has an excellent sealing ability to vacuum. It also has good heat resistance and an extremely low coefficient of thermal expansion.

Ceramic materials are distinguished from metals and organic materials for their unique characteristics, but their use is limited because of difficulty in machining as they are generally hard and brittle.

Recently some kinds of machinable ceramics have been developed for better machinability and they have attracted special interests. Although they have high machinability, they are not applicable in the engineering purposes due to the low bending strength as low as 10Kg/mm2.

Shapal-M soft is a new type of machinable ceramic with high mechanical strength and thermal conductivity. It is made on the basis of the first translucent aluminium nitride ceramic developed by Tokuyama Soda Co.Ltd. Based on it's new and unique characteristics, Shapal-M soft has a broad range of uses as a structural material and for many other applications.

Physical Properties of Shapal-M Machinable Ceramic Material

Shapal-M is a new type of machinable ceramic and combines a high thermal conductivity with a high mechanical strength with bending strengths of 30 kg/m. Shapal-M soft, in particular, has an excellent sealing ability to vacuum. It also has good heat resistance and an extremely low coefficient of thermal expansion.has a broad range of uses as a structural material and for many other applications.

Table 1. Physical properties of Shapal-M machinable ceramic

Property

Test Conditions

Shapal - Msoft

Machinable Glass-Ceramic

Units

GENERAL

 

Density

Corrected to 4°C

2.90

2.52

g/cm3

Porosity

25°C

0

0

%

ELECTRICAL

 

 

 

 

Volume Resistivity

25°C , DC

1012

1014

ohm.cm

Dissipation Factor

 

25°C , 1 MHZ

 

0.001

 

0.003 (10 kHZ)

0.007 (8.6 GHZ)

Dielectric Constant

 

25°C , 1 MHZ

 

7.1

 

5.92 (10 kHZ)

5.68 (8.6 GHz)

Dielectric Strength

25°C, sample
thickness 1mm, AC

40

40 (thickness 10mm)

kV/mm

THERMAL

 

 

 

 

Thermal Expansion Coefficient

RT to 400°C

4.4x10-6

9.4x10-6

/°C

 

RT to 600°C

4.8x10-6

11.0x10-6

/°C

 

RT to 800°C

5.1x10-6

12.3x10-6

/°C

Thermal Conductivity

25°C

90

1.7

 

Maximum Use Temperature

in air

1000

1000 (unstressed)

°C

 

in nonoxidizing atmosphere

1900

 
 

Thermal Shock Resistance £GT

water quench

400

-

°C

MECHANICAL

 
 
 
 

Bending Strength

25°C

30

10

kg/mm2

Compressive Strength

25°C

120

35

kg/mm2

Modulus of Elasticity

25°C

1.9 x10-4

6.7x103

kg/mm2

Poisson's Ratio

25°C

0.31

0.27

 

Vickers Hardness (Hv) kg/mm

25°C, 300g

390

230

kg/mm2

CHEMICAL DURABILITY

 
 
 
 

Resistance to Acid

10% HCl
24hrs, 25°C

0.2

21.5

mg/cm2
wt.loss

Resistance to Base

10%, NaOH
24hrs, 25°C

60

0.3

mg/cm

This information has been sourced, reviewed and adapted from materials provided by Precision Ceramics.

For more information on this source, please visit Precision Ceramics.

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