Methods of working, especially polishing, inhomogeneous...

Details Methods of working, especially polishing, inhomogeneous... Methods of working, especially polishing, inhomogeneous...

2005-04-05

2005-04-05

Nguyen, George (Department: 3723)

Abrading

Precision device or process - or with condition responsive...

Controlling temperature

C451S053000, C451S547000, C451S461000

Reexamination Certificate

active

06875079

ABSTRACT:
An inhomogeneous glass ceramic material having a ceramic phase and a glass phase is polished by a method that reduces surface roughness at a preselected temperature to values less than 2 Å. The method includes polishing the surface of the glass ceramic material at a predetermined working temperature with a polishing wheel and/or a suspension and selecting the predetermined working temperature so that differing erosion of the glass phase and the ceramic phase is compensated because of the different thermal expansion coefficients when the glass ceramic material is at the preselected temperature. In the case of the glass ceramic material the working temperature generally should be below the preselected temperature in order to minimize surface roughness.

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