A new processing route for the manufacture of cellular glasses has been developed. The strategy adopted for making the cellular glasses entails the following steps: (i) fabricating a formed body by combining glass powder and glass microspheres, and (ii) sintering the formed body. By controlling the sintering temperature and the microsphere content, it was possible to adjust the porosity so that it ranged from similar to 42% to similar to 62%. The compressive strengths of the cellular glasses with similar to 42% and similar to 60% porosities were similar to 150 and similar to 60 MPa, respectively. The superior compressive strengths were attributed to the homogeneous distribution of small (<= 35 mu m), spherical cells with dense struts in the cellular glasses.