Electric conductivity, heat capacity and thermal conductivity are 3.1×10~(6) S·m~(-1), 125.4 J/(mol·K) and 27.5 W/(m·K) at 25 ℃, thermal expansion coefficient is 8.8×10~(-6) K~(-1).
The thermal expansion coefficient values of △a/a_0、△c/c_0 and △V/V_0 per degree of La_(0.9)Sr_(0.1)MnO_3 lattice were 8.9×10~(-6)/℃、11.2×10~(-6)/℃ and 29.3×10~(-6)/℃.
The coefficient of thermal expansion of the materials obtained are 1.48×10-6, 1.50×10-6/℃ and 1.54×10-6/℃ at the temperature range of 20-1 000℃, and the corresponding porosities are 15% , 25% and 33% respectively.
The optimal sintering temperature of 840 ℃ are obtained based on the microstructure and the properties of sintering bodies which contained w(TiO2)=2 % and w(ZrO2)=2 %. The material possessed excellent properties: εr = 7.1, tan δ = 3×10–3 at 10 MHz and coefficient of thermal expansion about 7.8×10–6℃–1 at 20 ~ 400 ℃.
The coefficient of thermal expansion of AlSiC electronic packaging baseplates ranges from 6.88×10~ -6 to 8.14×10~ -6 ℃~ -1 at the temperatures of 100-500℃, the thermal conductivity is 170 W/(m·K), the bending strength is 398MPa and the hermeticity is less than 1×10~ -8 Pa·m~3/s.
Electric conductivity, heat capacity and thermal conductivity are 3.1×10~(6) S·m~(-1), 125.4 J/(mol·K) and 27.5 W/(m·K) at 25 ℃, thermal expansion coefficient is 8.8×10~(-6) K~(-1).
The thermal expansion coefficient values of △a/a_0、△c/c_0 and △V/V_0 per degree of La_(0.9)Sr_(0.1)MnO_3 lattice were 8.9×10~(-6)/℃、11.2×10~(-6)/℃ and 29.3×10~(-6)/℃.
The measured thermal expansion coefficients are α_a=2.6×10~(-6)/K,α_b=2.5×10~(-6)/K and α_c=8.7×10~(-6)/K from 298.15 to 573.15K along its crystallographic a,b and c axes,respectively.
Its thermal expansion coefficients were measured with a thermal mechanical analyzer. They are 8.4×10~(-6)/K,7.7×10~(-6)/K,and 1.65×10~(-5)/K along its X,Y,Z-axis respectively.
The thermal expansion coefficient (2.17 × 10-5 K-1) of the single-phase SmCoO3 is approximately equal to that of doped LaGaO3, but much bigger than that of SDC(Ce0.85Sm0.15O2) above 873 K.
At the same time, thermal conductivity varies between 104-140 W/(m·K); with the extrusion temperature, thermal expansion coefficient also increases but within 13 × 10-6 (at 100°C) and hermeticity of the material is high to 10-9 order of magnitude.
It is focused on the structure and phase transition, oxide-ion conductivity, mechanism of oxygen vacancy diffusion, chemical stability and thermal expansion coefficient in the pure and doped La2Mo2O9 samples.
The thermal conductivity coefficient in the temperature range from 275 to 450 K and the coefficient of thermal expansion in the range from 300 to 900 K are experimentally determined for solid solutions of the CaLa2S4-La2S3 system.
This expression is derived as a result of correlation analysis of experimental data on electrical resistivity and coefficient of thermal expansion of non-transition metals.
Results are given of experimental investigations of electrical resistance and coefficient of thermal expansion of nickel and β-brass in the temperature range from 300 to 1050 K.
The rearrangement of the 4f-electron spectrum as a result of temperature variation plays a decisive part in the formation of temperature dependences of the heat capacity and the coefficient of thermal expansion of unstable valence systems.
The thermal expansion coefficient (2.17 × 10-5 K-1) of the single-phase SmCoO3 is approximately equal to that of doped LaGaO3, but much bigger than that of SDC(Ce0.85Sm0.15O2) above 873 K.
Results showed that the morphology of the ZrWMoO8 particles can be simply adjusted by changing the gelling agents, and the thermal expansion coefficients of cubic ZrWMoO8 prepared in HCl solution are -3.84 × 10-6 K-1 from 100°C to 700°C.
The density, thermal conductivity, hermeticity and thermal expansion coefficients of the material are measured, and the relationship between extrusion temperature and properties is obtained.
Results showed that the morphology of the ZrWMoO8 particles can be simply adjusted by changing the gelling agents, and the thermal expansion coefficients of cubic ZrWMoO8 prepared in HCl solution are -3.84 × 10-6 K-1 from 100°C to 700°C.
The density, thermal conductivity, hermeticity and thermal expansion coefficients of the material are measured, and the relationship between extrusion temperature and properties is obtained.
The glass transition temperatures and the thermal expansion coefficients below and above the glass transition range are determined for barium aluminoborate glasses over a wide range of compositions containing up to 60 mol % BaO and 35 mol % Al2O3.
The glass transition temperatures and thermal expansion coefficients below and above the glass transition range are determined for lithium and sodium aluminoborate glasses over a wide range of concentrations.