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Aluminum Oxide (Alumina)

Material Information

Specifications

General PropertiesAlumina 96%Alumina 99.5%Alumina 99.8%
Density - gm/cc3.723.93.92
Crystal Size (Average) - Microns666
Water Absorbtion (Open Porosity) - %000
Gas Permeability - %000
ColorWhite / PinkIvoryIvory
Mechanical PropertiesAlumina 96%Alumina 99.5%Alumina 99.8%
Flexural Strength (MOR) 20°C - Mpa (psi x 10³)358 (52)379 (55)375 (54)
Elastic Modulus 20°C - GPa (psi x 10⁶)303 (44)370 (54)370 (54)
Poisson’s Ratio 20°C0.210.220.22
Compressive Strength 20°C - MPa (psi x 10³)2068 (300)2600 (377)2500 (363)
Hardness - GPa (kg/mm²)11.5 (1175)14.1 (1440)14.1  (1440)
Hardness - R45N788383
Tensile Strength 25°C - MPa (psi x 10³)221 (32) 262 (38)248 (36)
Fracture Toughness K(I c) - mpa m½5-Apr4.55-Apr
Electrical PropertiesAlumina 96%Alumina 99.5%Alumina 99.8%
Dielectric Strength 6.35mm - ac-kV/mm (ac V/mil)8.3 (210)8.7 (220)8.7 (220)
Dielectric Constant 1 MHz - 25°C99.79.8
Dielectric Loss (tan delta) 1 MHz - 25°C0.00020.0001<0.0001
Volume Resistivity 25°C - ohm-cm>10
Volume Resistivity 500°C - ohm-cm
Volume Resistivity 1000°C - ohm-cm
Thermal PropertiesAlumina 96%Alumina 99.5%Alumina 99.8%
Thermal Conductivity 20°C - W/m K24.73030
Coefficient of Thermal Expansion 25-1000°C - X 10-6/°C8.28.2832
Specific Heat 100°C - 880 J/kg*K880880880
Thermal Shock Resistance   ΔTc - °C250200200
Maximum Use Temperature - °C170017501750

NOTE: The information in this data sheet is for design guidance only. Forming methods and specific geometry could affect properties.

Overview

Alumina is properly called aluminum oxide, which is a chemical compound comprised of aluminum and oxygen molecules (Al2O3). When refined from bauxite, alumina generally looks like a white powder similar to table salt or granular sugar. Aluminum oxide is typically referred to as alumina, but may also be called aloxide, aloxite or alundum, depending on the industry and the metal’s use. In addition to its use in the production of primary aluminum, aluminum oxide has other key industrial uses. Alumina is often used as a filler for plastics. The compound is also widely used as an abrasive and is a less-expensive substitute for industrial diamond. Aluminum oxide flakes produce reflective effects within the paint used on automobiles. The largest scale use of alumina occurs in refineries, where the aluminum oxide compound is used to convert dangerous hydrogen sulfide waste gases into elemental sulfur. Data provided by The Aluminum Association and Ortech Advanced Ceramics.

Applications & Usage

  • Repeller Insulators
  • Ceramic Fasteners
  • Spindle Fork Fingers
  • Ball Joints
  • Dental Cements
  • Toothpaste
  • Sunscreen
  • Abrasive component in sandpaper, grinders, polishers, and microdermabrasion
  • Integrated Circuits
  • Compact Fluorescent Lamps
  • Reflective Paint

Industries Using This Material

Semiconductor

One of the original second source providers, Glemco has been manufacturing products in the US in support of the semiconductor industry for over 40 years. Our extensive history means that we can support the oldest legacy equipment or the newest cutting-edge implant technology, with available upgrades and enhancements to drive efficiency, reliability and performance improvements.

Semiconductor

One of the original second source providers, Glemco has been manufacturing products in the US in support of the semiconductor industry for over 40 years. Our extensive history means that we can support the oldest legacy equipment or the newest cutting-edge implant technology, with available upgrades and enhancements to drive efficiency, reliability and performance improvements.
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Machining

With a well augmented modern manufacturing facility and a highly skilled team with experience in a broad variety of materials, we offer a full suite of CNC services for production ready parts. With a broad compliment of support equipment, we offer a multi-disciplinary, turnkey option that few other manufacturers can accommodate.

Machining

With a well augmented modern manufacturing facility and a highly skilled team with experience in a broad variety of materials, we offer a full suite of CNC services for production ready parts. With a broad compliment of support equipment, we offer a multi-disciplinary, turnkey option that few other manufacturers can accommodate.

Telcom

Precisely crafted components are necessary to support this rapidly changing industry. Poor quality here can contribute to lost time around the globe. Our multi axis machining capabilities allow us to create highly accurate complex parts from a variety of high strength materials.

Telcom

Precisely crafted components are necessary to support this rapidly changing industry. Poor quality here can contribute to lost time around the globe. Our multi axis machining capabilities allow us to create highly accurate complex parts from a variety of high strength materials.

Pharmaceutical

CNC machining is critical to delivering the precision and value required for success in manufacturing pharmaceutical equipment and replacement parts. Quality, precision and efficiency are always our priorities.

Pharmaceutical

CNC machining is critical to delivering the precision and value required for success in manufacturing pharmaceutical equipment and replacement parts. Quality, precision and efficiency are always our priorities.

Energy

CNC machining technology has always been crucial in creating the complex devices that drive our energy industry. Advanced machining techniques are used to achieve the level of quality and efficiency needed to support today’s complex and varied methods of power generation.

Energy

CNC machining technology has always been crucial in creating the complex devices that drive our energy industry. Advanced machining techniques are used to achieve the level of quality and efficiency needed to support today’s complex and varied methods of power generation.

Medical

Our 5-axis high speed milling and multi-axis turning capabilities produce more accurate parts; multi-dimensional parts can be machined quickly without losing positional accuracy. With over 40 years of CNC experience in difficult to work materials and tight tolerances, Glemco is a shop you can rely on to provide the quality and precision you need.

Medical

Our 5-axis high speed milling and multi-axis turning capabilities produce more accurate parts; multi-dimensional parts can be machined quickly without losing positional accuracy. With over 40 years of CNC experience in difficult to work materials and tight tolerances, Glemco is a shop you can rely on to provide the quality and precision you need.
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Measurement & Inspection Equipment

Milling Machinery

Positional and dynamic 5 axis machining centers, up to x= 60” y= 26” z= 24”
High speed drilling and tapping centers, up to x=24” y=15.75” z=24”
Vertical machining centers, up to x=24” y=12” z=12”

Turning Tools

2 axis, max diameter 9”, max thru spindle diameter 2”, Max length 22”
4 axis with live tooling, max diameter 14”, max thru spindle diameter 3”, Max length 24”
5 axis with live tooling, max diameter 9”, max thru spindle diameter 2.6”, Max length 4.7”

Wire EDMs

Max part size x=41” y= 32.25” z= 11.75”
Max cutting capacity x=23.5” y= 15.5” z= 12”

CNC Sheet Metal Forming Machinery

Precision 36 ton, 6 axis control press brake, 48” length, 4” stroke, 10” throat depth

Versatility & Support Tools

Mills and lathes
Surface grinders
Hydraulic presses
Sheet metal shears
Horizontal and vertical band saws
Indexers/Rotary tables
Kilns
Blue M Ovens

National Women Business Owners Corporation Certified

Glemco has met all necessary criteria for NWBOC certification. Liana Merriman is the controlling business owner and is the final decision maker to employees, supervisors and managers. Her control spans all management of the business including sales, production and financial operations. Partners, vendors and suppliers can be confident that Glemco is indeed a woman owned company. View our NWBOC Certificate.

Proud To Be An ISO 9001: 2015 Certified Company

Glemco appreciates that the customer is our business. We embrace ISO as a management tool, and believe that only by embracing the concepts of Total Quality Management can we best service our customers. Glemco is committed to total customer satisfaction, achieved through innovative solutions to our customer’s needs. We strive to offer the highest quality product with continual improvement of manufacturing processes, service, and delivery. View our ISO 9001: 2015 Certificate.