Zhang Wel ¹, Han Yaling¹, Pan Binbin²

(1．School of Materials Science and Engineering，Shenyang University of Technology，110023)

(2．Apex-i International(Shanghai) Co.，Ltd．，200120)

Abstract: In order to obtain the best synthesis temperature of cordiente by the method of direct sintedng，samples were synthesized with pressed raw blocks respectively at controlled temperatures of 1310 ℃，1350 ℃ and 1400 ℃．The best synthesis temperature of cordierite by the method of direct sintering was determined by comparing XRD pattems of these samples．The results show that the best synthesis temperature for cordierite is 1 400 ℃ when holding time is the same；increasing the firing temperature accelerates the transformation rate of spinel into cordierite．In addition，the principle of thermal expansion was explained by researching on the structure characteristics of cordierite．

Key words: cordiedte，method of direct sintering，synthesis temperature，synthesis technique，press-forming