Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Iwao Maki"'
Publikováno v:
Journal of the American Ceramic Society. 79:2577-2581
A series of strontium-bearing dicalcium silicate (Ca2Si04 solid solutions (C2S(ss)), (SrχCa1-χ)2SiO4 with 0.02 ≤χ≤ 0.10, was prepared and examined by powder X-ray diffrac-tometry. These crystals, heated in the stable-temperature region of the
Publikováno v:
Journal of the American Ceramic Society. 80:1595-1598
Crystals of β-Ca2SiO4 (space group P121/n1) were examined by high-temperature powder X-ray diffractometry to determine the change in unit-cell dimensions with temperature up to 645°C. The temperature dependence of the principal expansion coefficien
Publikováno v:
Cement and Concrete Research. 32:1039-1044
Portland cement clinkers from the rotary kiln vary with their grain size in both chemical compositions and microscopic textures, according to the wide variation in the burning and nodulization environment in the kiln. The dense interior of large clin
Publikováno v:
Cement and Concrete Research. 32:931-934
Two kinds of portland cement clinker with widely different MgO and SO3 content were reheated for a long time at elevated temperature. With the clinker rich in MgO and SO3, alite increased while belite decreased in quantity after reheating. The alite
Publikováno v:
Journal of the American Ceramic Society. 79:2925-2928
Dicalcium silicate solid solutions (C2S(ss)) doped with Na2O, A12O3, and Fe2O3 were examined by high-temperature optical microscopy. Surface deformation caused by a possible martensitic transformation between a′L and β phases was observed in situ
Publikováno v:
Mineralogical Journal. 18:161-168
Single crystals of K-priderites (Kx(M,Ti)8O16, M=Al, Fe and Mg) were grown from melts. Despite of the wide range of the solid solution the composition of all the single crystals obtained was around x=1.5. The prismatic faces of K–Al– and K–Mg-p
Publikováno v:
Cement and Concrete Research. 25:863-869
The solid solution of MgO in Ca 2 FeAlO 5 and the resulting change in anisotropic absorption have been studied. The solid solution of MgO was investigated by directly determining the chemical formulas of the solid solutions of the system Ca 2 FeAlO 5
Publikováno v:
Cement and Concrete Research. 25:835-840
The conversion process of quartz grains into belite clusters in portland cement clinker has been followed under isothermal heating conditions at 1400 °C. On heating, quartz grains are surrounded by layers consisting of belite and liquid, which conti
Publikováno v:
Journal of the Ceramic Society of Japan. 103:444-448
The cell dimensions for a series of β-Ca 2 SiO 4 solid solutions were determined as a function of concentration of foreign oxides (Na 2 O, Al 2 O 3 and Fe 2 O 3 ). The angle β varied most sensitively with the Na/(Na+Ca) ratio (=x) according to β(
Publikováno v:
Journal of the American Ceramic Society. 77:2615-2619
The crystal structure and microtexture of P-bearing Ca2SiO4solid solutions (C2S(ss)) were studied as a function of x= P/(Si + P) ranging from 0.085 to 0.398. All the samples were prepared at the stable-temperature region of the α′l-phase and quenc