ICSI

Research

Main Research Topics

The main business of ICSI is technological research on topics in the domains of ceramics and glass engineering, focusing on advanced technical ceramics. The research is funded by industrial companies and government organizations (like the Ministry of Economy, the Ministry of Defense and the Ministry of Science and Technology).

Wire bonding capillaries for electronic chips connecting

ICSI research contributed to the improvement of various stages of the fabrication technology:

Procedure for attrition milling

Freeze spray based granulation method

New materials for improved wear resistance: doped oxides, non oxides

Pure silica bulk glass fabrication below 1500°C

  • In-house prepared monosize, spherical silica powder.
  • Ultrafast MW sintering, which prevents crystallization.
  • Forming of ordered particles of thickness ≥10mm exhibiting
    narrow size distribution of nano porosity.
  • Application: Preform for drawing of high purity optical fibers.

Q-switches based on polycrystalline transparent ceramic or glass ceramics

Ceramic host:
  transparent spinel.
Glass ceramic host:
  nano-gahnite (ZnO•Al2O3)

Absorption spectra

SPECTRAL CHARACTERISTICS

Material co2+ : TGC (n-Ga) co2+ : MG-Sp S.C.
σgsa [•10-19cm2]
3.4
4.5
σesu
0.37
0.46
FMWH [ns]
32
75
E [mJ]
4.0
∼3.0
τes [ns]
350
Laser damage
>16 W/cm2 (low no. of test pulses)
Co2+:Sp (ICSI)

Fabrication procedure for transparent polycrystalline MgAl2O4 spinel

  • HV5 = 13.8-14.2 GPa
  • TRS = 200±50 MPa
  • E = 290±10 GPa
  • Applications: Low areal density transparent armor.
    IR sensor protecting cones for missiles

High performance piezoceramic materials

  • Synthesis procedures for piezoceramic powders have been developed.
  • Fabrication methods for various types of actuator were established.

Specialty ICSI piezoceramic materials

Material code Special features Applications
IP7 (Ba) acc. Relaxor + PZT
Large εr combined with high Qm
εr = 2820; tanδ = 4 • 10-3; Qm = 410
High power directional phased-array ultrasound projectors (medical guns)
IP-AM-1
Intermediate range values of Qm (200 - 300)
Allows the use of low cost driving electronics for long service life actuators
PLZT-7
High value of g31 • d31 = 2.22 • 10-9 VN-2 g31 =12 • 10-3 VmN-1 and kp ≈ 0.66
Igniters
PLZT-1
Optical VIS transmission ∼70%. t=2mm kp = 0.72; d33 = 710 • 10-12 m/V;
Rq = 38.6 • 106 m2 / V2
Electro - optic devices

Piezoelectric coefficient

e.g. La/Zr/Ti 7/60/40
kp = 0.72
d33 = 710 • 10-12 m/v
g33 = 22.8 Vm/N

Electrooptic coefficient

R (quadratic) = 38.6 • 106 m2/V2
R (linear) = 1.0 • 1010 m/V

Fast MW sintering of ceramics

Direct (without aid of susceptors) fast MW densification procedures –
for different types of advanced ceramics – were established.
Material Characteristics Applications

B4C/SiC/Al

BD = 2.65 - 2.80 g/cm3

Lightweight armor

HV5 = 19 - 25 GP
KIC = 3.1 - 3.6 MPam½
WC/xCo
BD = 14.5 g/cm3
Cutting tools
HV5 = 15.8 GPa
KIC = 14.3 MPam½
TRS = 3.1 - 3.45 GPa
η - Co3W3C = 0%
Free carbon = 0%
TZP (5.17% Y2O3)
BD = 99.5% TD
Milling media
TRS = 6.40 ± 40 MPa
HV1 = 14.5 GPa
KIC = 5.75 MPam½
Al2O3/TiC
BD = 98.2% TD (after HIP)
Cutting tools
HV = 12 GPa
B4C/SiC/Al based hard ceramics (MW)
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