Thermal Expansion of High Cordierite and Its Solid Solutions

Direction dependent mechanical properties of extruded cordierite honeycombs

“…[9][10][11] To correlate the material behaviour of the extruded cordierite, the CTE of the single crystal with the high form in the direction of the c-axis is assumed to be α c = −0.47E−06 1/K and in the direction of the a-axis α a = 3.29E−06 1/K. 8 Fig. 5 shows the temperature dependent expansion of the a-and c-axes of the high form cordierite single crystal.…”

Crystallization of indialite/cordierite glass ceramics for millimeter-wave dielectrics

“…And at 920 1C, β-quartz s. s. were crystallized. The β-quartz s. s. converted to indialite at 950 1C [14][15][16]. So, the first peak of 919 1C shows crystallization β-quartz s. s. and the second peak of 946 1C indialite.…”

Effects of Ionic Size in the Tetrahedral and Octahedral Sites on the Thermal Expansion of Low‐Temperature Cordierite

“…Beryl (Be 3 Al 2 Si 6 O 18 ) has the same crystal structure as cordierite, and their thermal expansion behaviors are markedly similar. The thermal expansion coefficients of high cordierite are 2.2 (10 −6 K −1 ) for the a axis and −1.8 (10 −6 K −1 ) for the c axis 3 . The coefficients of beryl are 2.6 (10 −6 K −1 ) for the a axis and −2.9 (10 −6 K −1 ) for the c axis 12 .…”

“…Cordierite undergoes slight thermal expansion parallel to the plane of the six‐membered rings (along the a and b axes) and slight contraction perpendicular to the rings (along the c axis). Numerous studies have been carried out to elucidate the mechanism of the expansion and the effect of the size of the cation on expansion in natural and synthetic cordierites, either pure or substituted 1–6 . To investigate the effect of cation size, Miyake recently carried out molecular dynamics (MD) simulations in which the cation sizes were varied systematically by changing a parameter 7 .…”

“…Numerous studies have been carried out to elucidate the mechanism of the expansion and the effect of the size of the cation on expansion in natural and synthetic cordierites, either pure or substituted. [1][2][3][4][5][6] To investigate the effect of cation size, Miyake recently carried out molecular dynamics (MD) simulations in which the cation sizes were varied systematically by changing a parameter. 7 However, these studies cannot show which of the M-, T1-, and T2-sites strongly affect the thermal behavior, because Al and Si ions occupy both the T1-and T2-sites.…”