Low-thermal-expansion porous ceramics are required for numerous applications. This work develops low-thermal-expansion porous ceramics by using SiC and ZrW(2)O(8) as positive and negative thermal expansion materials, respectively, bonded by a glassy material. The mixture of SiC, ZrW(2)O(8), and glassy material was sintered by the conventional method or pulsed electric current sintering (PECS, or sometimes called spark plasma sintering) at 850 degrees C. In samples sintered by PECS with ZrW(2)O(8), particle size 20-45 mu m or 45-90 mu m can preserve ZrW(2)O(8) during the sintering process and have a low thermal expansion coefficient. Samples sintered by the conventional method have a high thermal expansion coefficient because ZrW(2)O(8) decomposes to ZrO(2) and WO(3) at the sintering temperature.