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  • Tm Wca Series Alpha Alumina For Monocrystalline Silicon - China

    price: contact company for price

    This abrasive material is developed by our company specially for the

    electronics industry. It uses commercial alumina as main raw material

    and adopts special mineralizing agent. After high temperature

    calcinations, it will turn into tabular alumina with grain crystal of a

    certain thickness-to-diameter ratio. Tabular alumina is ground and

    strictly classified. The powder color is white. According to the users’

    requirements, we can produce this abrasive material with Chinese

    standard or Japanese JIS standard.


    Crystal has a plate form and peripheral edge is smooth, which makes it free from scratch. It has characters of narrow particle size distribution, high hardness (Moh’s hardness 9) and strong grinding force. After being ground, the plate has good-quality surface. It can reach the quality level of similar foreign products and replace the imported ones. It is produced exclusively by our company in China.


    1) Electronics industry: Monocrystalline silicon wafer polishing

    2) Electronics industry: crystalline lens polishing

    3) Electronics industry: Aluminum alloy material, like mobile phone shell and stainless steel polishing

    4) Decoration industry: stainless steel tableware and other decorating material polishing

    5) Spraying material: plasma spraying


    WCA03,WCA05,WCA09,WCA12,WCA15,WCA20, etc.

    Main Technical Parameters of TM-WCA Seriesalpha-Alumina for Monocrystalline Silicon Wafer Abrasive:


    Type AL2O3>=

    (%) Impurity Content <=(%) True Density

    >=(g/cm³) L.O.I. PH Value Suspension Property >= Grinding Rate


    SiO2 Fe2O3 Na2O

    TM-WCA 99.6 0.05 0.05 0.25 3.92 0.04 7.5-8.5 24hr 7.5

    Imported Abrasive 99.6 0.08 0.05 0.30 3.92 0.10 7.5-8.5 24hr 7.5


    1) Suspension performance is holding time without settlement after two abrasive materials (our company’s WCA and Japanese Rich Jimmy PWA15) are mixed with suspending liquid in equal proportion.

    2) Grinding rate is measured by grinding 4-inch monocrystalline silicon wafer on the same grinding machine with these two abrasive materials (our company’s WCA and Japanese Rich Jimmy PWA15).

    Company Contact:

    • Phone: 8637168138155

    • Address: No.25 Anyang Road Shangjie District , Zhengzhou, China

    • Email: Email

    Published date: December 29, 2013 -

    • Business Description: Zhengzhou Tianma Micropowder Co., Ltd. is a professional alumina manufacturer that engages in scientific research for, producing of and testing (trading) of alumina products. The company is a member of the China Association of Industry and Commerce and maintains a long term relationship with the China Academy of Science. The company controls its own import and export operations. In 2003, Zhengzhou Tianma was awarded ISO9001: 2000. In 2004, the company was confirmed as a Hi tech Company by the government of Henan province.
      The factory is constructed on 16,800 square meters of land with over 14,500 square meters of facilities. Our company owns both land and the factory which contains an environment friendly high temperature gas tunnel kiln capable of an annual output of 15,000 tons. We have excellent equipment, advanced techniques, a qualified technical staff and complete inspection facilities. We produce over 20 products in this one facility. The product line includes α AL2O3 for color TV, α AL2O3 for IC chip manufacturers, α AL2O3 for high voltage appliances, α AL2O3 for Single Crystal Silicon Wafer fabrication, α AL2O3 for specialty ceramics and refractory applications as well as sheet and ceramic powders. Our products are of high quality, which is reliably supplied. We have been awarded patents on some of our products. Our techniques and quality meet world class standards, and some exceed world class standards. Exports go to the USA, Japan, Korea, and Taiwan. We have earned the trust of the worlds leading producers.
      Utilizing ISO9001: 2000 techniques, the company continues to improve our quality systems in order to sustain our high standards. By doing so, we can guarantee the quality of our products. Our high quality products and competitive cost permit our customers to enjoy the benefits of profitability.
      Our Corporate philosophy is: maintaining highly qualified staff, building a world class facility, and producing high quality products. We strive to supply high quality products and services in order to obtain the trust and support of our customers and society in general.

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