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High purity alumina TAIMICRON

  1. High purity alumina "TAIMICRON"
  2. Low temperature sinterable alumina; TM-D series
  3. Transition alumina series
  4. Spray dried alumina; TM-DS series
  5. Other special grade
  6. Technical data
  7. Download
  8. Contact us

1.High purity alumina "TAIMICRON"

"TAIMICRON" is high purity and ultra-fine ceramics powder that was produced on the 'Aluminum Compound Synthesis Technique' cultivated by TAIMEI CHEMICALS co., ltd.
"TAIMICRON" is high purity fine powder developed on the basis of synthesizing ammonium dawsonite NH4AlCO3(OH)2.
"TAIMICRON" will be suited for customer's needs and market demand on the account of widely products line-up, Alpha-alumina, transition alumina, amorphous alumina, boehmite, and other alumina based high purity compound, Produced by TAIMEI CHEMICALS co., ltd.

The manufacturing Process
Applications
  • High strength materials
    cutting tools, bearings, artificial bones, etc.
  • Electronic materials
    IC substrates, insulators, etc.
  • Optical materials
    translucent parts, ruby, YAG, etc.
  • Other
    abrasives, catalyst carrier, etc.

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2.Low temperature sinterable alumina TM-D series

"TAIMICRON TM-D series" are ultra-fine and agglomerate-free powders with high purity of >99.99%

Because of these characters, these powder can density to near theoretical density at <1300 ˚C.
The sintered body has fine and homogeneous microstructure, and shows good performance in many Properties: strength, hardness, wear resistance, corrosion resistance, etc.
TM-DA and TM-DAR are much purer than TM-D and TM-DR, respectively.

Typical data

Grade TM-D TM-DR TM-DA TM-DAR TM-5D
Crystalline form Alpha Alpha Alpha Alpha Alpha
B.E.T. Specific surface area m²⁄g 13.5 14.5 13.5 14.5 9.0
Primary particle size*1 µm 0.10 0.10 0.10 0.10 0.20
Bulk density m³⁄g 0.8 0.9 0.8 0.9 0.8
Tapped density m³⁄g 0.9 1.0 0.9 1.0 0.8
Pressed density*2 m³⁄g 2.2 2.3 2.2 2.3 2.3
Sintered density*2 m³⁄g 3.95*3 3.96*3 3.95*3 3.96*3 3.93*4

*1; measured by SEM
*2; uniaxial press at 98MPa
*3; 1350˚C for 1Hr. in air
*4; 1400˚C for 1Hr. In air

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3.Transition alumina

"Transition alumina" series consist of Main phases of Gamma and / or Theta -alumina as main phase, respectively. Particle size of these powders is very fine, so these have large BET value and much high activity.

Typical data

Grade TM-100 TM-300 TM-100D TM-300D
Crystalline form Theta Gamma Theta Gamma
B.E.T. Specific surface area m²⁄g 120 220 120 200
Primary particle size*1 µm 0.014 0.007 0.014 0.010
Bulk density m³⁄g 0.12 0.05 0.40 0.40
Tapped density m³⁄g 0.18 0.08 0.60 0.60

*1; calculated from BET value

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4.Spray dried alumina powder TM-DS series

"TM-DS series" are spray-dried type of TM-D series produced for the purpose of pressing or injection molding.
The properties of the typical grade are in table. We are also ready to prepare another grades on the customer's requests.

Typical data of each grade

Grade DS-6 DS-25 DS-81 DS-31 DS-SD-31 DS-90M
Main binder - Acrylate Acrylate Acrylate Acrylate Acrylate
Doped MgO ppm - - - - - 500
Loss of Ig.*1 % 1 6 4 6 6 4
Plasticity Excellent Good Excellent Good Good Excellent
Pressed density*2 m³⁄g 2.25 2.40 2.35 2.35 2.35 2.35
Sintered density*2 m³⁄g 3.94*3 3.95*3 3.95*3 3.95*3 3.93*4 3.95*3
Mold releasability Good Good Good Good Good Good
Green strength Inferiors Excellent Good Excellent Excellent Good

*1; after burning out
*2; uniaxially pressed at 98MPa
*3; 1350˚C for 1Hr.in air
*4; 1400˚C for 1Hr.in air

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5.Special grade

Al2O3-ZrO2powder mixture

Others

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6.Technical data

Purity and Typical analysis
Alumina content of "TAIMICRON" is over 99.99%. / Measured by ICP-AES

Al2O3(%) Impurities(ppm)
Si Fe Na K Ca Mg Cu Cr Mn U Th
>99.99 10 8 8 3 3 2 1 <1 <1 <0.004 <0.005

Particle size distributions of each grade

Particle size distributions of each grade

Particle size distributions of each grade / Measured by Laser light diffraction

Densification behaviors of each grade

Densification behaviors of each grade

Densification behaviors of each grade
/uniaxially pressed (98MPa) and fired (1Hr.in air)

Relationship between firing temperature and crystalline diameter

Relationship between firing temperature
and crystalline diameter

 

SEM photograph of 'TM-DAR'

SEM photograph of 'TM-DAR'

Microstructure of sintered 'TM-DAR'

Microstructure of sintered 'TM-DAR'
(1350˚C for 1HR.in air)

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7.Download

Download Pamphlet and MSDS of products.(PDF file type)
You need Adobe Reader in order to view the PDF files.
ADOBE READER

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8.Contact us

For further information or any comments, please contact...

TAIMEI CHEMICALS CO.,LTD. SALES OFFICE
Address Eeiko-GinzaBldg.6F, 2-3-2, Ginza, Chuo-ku, Tokyo 104-0061 Japan
e-mail info@taimei-chem.co.jp
TEL +81-3-3563-2491
FAX +81-3-3563-2498

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