Nilcra® Sialon E

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Data Sheet Nilcra® SiAlON E Description A Gas Pressure Sintered Silicon Nitride with exceptional strength and toughness. Contains interlocking grains of beta phase silicon nitride. Designed for applications requiring high strength, toughness and wear resistance. Prime Features Specifications High Strength at ambient & high temperature • Quality Assurance to ISO 9001 Excellent fracture toughness Extremely high hardness & wear resistance Low coefficient of thermal expansion Typical Applications: Good thermal shock resistance Excellent for combating wear and Excellent corrosion resistance corrosion in valves, pumps and liners Non-wetting in molten metal used in chemical processing and Low oxidation at elevated temperatures refining environments Successfully used for a wide variety of Physical Properties tooling used in metal forming and dry cell battery production Colour Black 3 o Density g/cm 20 C 3.21 Production Capabilities Flexural Strength MPa 20oC 650 Sintered components 1200oC 450 Precision ground components Weibull Modulus 20oC 15 Ceramic / Metal assemblies Compressive Strength MPa 20oC 3000 Ceramic design assistance Modulus of Elasticity GPa 20oC 320 Prototyping, batch and volume Poisson’s Ratio 20oC 0.28 production Hardness HV0.3 kg/mm2 20oC 1630 Hardness Rockwell 45N 20oC 85 Fracture Toughness MPa√m 20oC 8 Average Grain Size µm 1-10 Thermal Conductivity W/m-K 20oC 25 1000oC 15 Thermal Expansion Coefficient 25-1000oC 3.2 x10-6 mm/mm/˚C Please note that all values quoted are based on test pieces and may vary according to component design. These values are not guaranteed in anyway whatsoever and should only be treated as indicative and for guidance only. www.morganadvancedmaterials.com Morgan Advanced Materials PLC Registered in England & Wales at Quadrant, 55-57 High Street, Windsor, Berkshire SL4 1LP UK Company No. 286773 ©Copyright of The Morgan Advanced Materials PLC and its affiliates, 2013. All rights reserved. .

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Crystal Structures and Luminescence Properties of Aln-Deficient Eu2+
Journal of the Korean Physical Society, Vol. 57, No. 4, October 2010, pp. 990∼993 Crystal Structures and Luminescence Properties of AlN-deficient Eu2+-activated Ca-α-SiAlON Phosphor Sung-Soon Park, Bo-Yun Jang∗ and Joo-Seok Park Korea Institute of Energy Research, Daejeon 305-343 Sahn Nahm Department of Materials Science and Engineering, Korea University, Seoul 136-701 (Received 15 January 2010, in final form 5 July 2010) Eu2+-doped Ca-α-SiAlON phosphor was synthesized by normal pressure sintering with conven- tional tube furnace, and its crystal structures and luminescence properties were investigated. Eu2+- doped Ca-α-SiAlON phosphor exhibited an orange light peaking at 583 nm. During the annealing, some of the raw materials evaporated, which resulted in unreacted AlN in the final product. In or- der to obtain a final product with a single α-phase, we prepared samples with various AlN-deficient compositions, and we studied the effects on crystal structures and luminescence properties. For the sample with 15 mol% AlN-deficient composition, 18% enhancement of the intensity was obtained with the disappearance of excess AlN. In addition, the internal quantum efficiency (IQE) was mea- sured using a specially designed integrating sphere, and 56.82% IQE was gained from Eu2+-doped Ca-α-SiAlON phosphor. PACS numbers: 42.70.-a Keywords: α-SiAlON, Europium, Phosphor, Luminescence, Crystal Structure DOI: 10.3938/jkps.57.990 I. INTRODUCTION shows excellent chemical and mechanical stability [15– 17]. SiAlON is known to be stabilized structurally by doping with Y, Li, Ca and rare earth element. Krevel et White light emitting diodes (LEDs) have been the sub- al.
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