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SILICON CARBIDE, BORON CARBIDE, SPRAY NOZZLES

SILICON CARBIDE (SiC) AND BORON CARBIDE (B4C) SPRAY NOZZLES

For atomizing abrasive and corrosive media or suspensions, it is essential to use the appropriate nozzles. A long lifetime and constant spray conditions are the principle requirements to ensure a reproducible, cost-effective process.

Product Program and Properties

ESK spray nozzles and nozzles made of EKasic (sintered silicon carbide) and TETRABOR (boron carbide) meet these conditions thanks to their outstanding properties:

  • Extreme abrasion resistance
  • Universal corrosion resistance
  • Chemical inertness

Application Fields

ESK spray nozzles are used in chemical processes engineering, such as flue-gas desulfurization, homogenization and spray drying.

fileadmin/esk/plain/ekasic-e.html

Silicon Carbide
Material properties Norm Symbol/Unit EKasic®
F
EKasic®
F plus
EKasic®
C
Density DIN EN 623-2 ρ [g/cm3] >3.15 >3.18 >3.15
Porosity DIN EN 623-2 P [%] <2.0 <1.0 <2.0
Mean grain size [μm] <5 <5 bimodal
Grain size distribution [μm] 10-1500
Phase composition α-SiC α-SiC α-SiC
Vickers hardness DIN EN 843-4 HV 1 [GPa] 24.5 24.5 24.5
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 24.5 24.5 24.5
Young's modulus DIN EN 843-2 E [GPa] 430 430 430
Weibull modulus DIN EN 843-5 m 10 10 10
Flexural strength,
4-pt bending
DIN EN 843-1 σB [MPa] 400 550 400
Compressive strength σD [MPa] > 2500 > 2500 > 2500
Poisson ratio ν 0.17 0.17 0.17
Fracture toughness
(SENB)
Klc [MPa·m0,5] 4 4 4
Coefficient of
thermal expansion
DIN EN 821-1
20°C - 500°C α [10-6/K] 3.8 3.8 3.8
500°C - 1000°C α [10-6/K] 5.1 5.1 5.1
Specific heat at 20°C DIN EN 821-3 cp [J/g K] 0.69 0.69 0.69
Thermal conductivity
at 20°C
DIN EN 821-2 λ [W/mK] 130 130 130
Thermal stress
parameters
calculated
R1 = σB·(1-ν) / (α·E) R1 [K] 203 255 203
R2 = R1·λ R2 [W/mm] 26 34 26
Specific electrical
resistance at 20°C
DIN EN 50355 ρ [Ω cm] > 108 > 108 104-105



Silicon Carbide
Material properties Norm Symbol/Unit EKasic®
P
EKasic®
G
EKasic®
T plus
Density DIN EN 623-2 ρ [g/cm3] >2.76-
2.89
>3.10 >3.24
Porosity DIN EN 623-2 P [%] 10-14 <2.0 <1.0
Mean grain size [μm] <5 bimodal <2
Grain size distribution [μm] 10-1000  
Phase composition α-SiC α-SiC,
graphite
α-SiC,
YAG
Vickers hardness DIN EN 843-4 HV 1 [GPa] 24.5 24.5 22.5
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 24.0 24.0 22.5
Young's modulus DIN EN 843-2 E [GPa] 340 390 430
Weibull modulus DIN EN 843-5 m 15 15 15
Flexural strength,
4-pt bending
DIN EN 843-1 σB [MPa] 225 250 650
Compressive strength σD [MPa] > 2000 > 2200 > 2500
Poisson ratio ν 0.13 0.15 0.17
Fracture toughness
(SENB)
Klc [MPa·m0,5] 3 3.5 6
Coefficient of
thermal expansion
DIN EN 821-1
20°C - 500°C α [10-6/K] 3.8 3.8 4.1
500°C - 1000°C α [10-6/K] 5.1 5.1 5.3
Specific heat at 20°C DIN EN 821-3 cp [J/g K] 0.69 0.69 0.71
Thermal conductivity
at 20°C
DIN EN 821-2 λ [W/mK] 110 130 87
Thermal stress
parameters
calculated
R1 = σB·(1-ν) / (α·E) R1 [K] 152 143 306
R2 = R1·λ R2 [W/mm] 17 19 27
Specific electrical
resistance at 20°C
DIN EN 50355 ρ [Ω cm] > 108 104-105 103-105
fileadmin/esk/plain/tetrabor_b4c-e.html

Boron Carbide
Material properties Norm Symbol/Unit TETRABOR®
Density DIN EN 623-2 ρ [g/cm3] >2.48
Porosity DIN EN 623-2 P [%] <0.5
Mean grain size [μm] <10
Phase composition B4C, C
Vickers hardness DIN EN 843-4 HV 1 [GPa] 26
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 27
Young's modulus DIN EN 843-2 E [GPa] 410
Weibull modulus DIN EN 843-5 m 15
Flexural strength, 4-pt bending DIN EN 843-1 σB [MPa] 460
Compressive strength DIN 51104 σD [MPa] >2800
Poisson ratio DIN EN 843-2 ν 0.18
Fracture toughness (SENB) Klc [MPa·m0,5] 5
Coefficient of thermal expansion DIN EN 821-1
25°C - 500°C α [10-6/K] 4.5
500°C - 1000°C α [10-6/K] 6.3
Specific heat at 25°C DIN EN 821-3 cp [J/g K] 0.94
Thermal conductivity at 25°C DIN EN 821-2 λ [W/m K] 36
Thermal stress parameters calculated
R1 = σB·(1-ν) / (α·E) [K] 204
R2 = R1·λ [W/mm] 7
Specific electrical
resistance at 25°C
DIN EN 50359 ρ [Ω cm] 1