摘要:
Alumina/zirconia ceramics containing Al2O3 in an amount of not less than 65 mass % and ZrO2 in an amount of 4 to 34 mass %, and further containing TiO2, MgO and SiO2. The ceramics effectively suppresses the growth of shape isotropic particles of alumina, suppresses the growth of zirconia particles, and has a high strength and a high hardness. Besides, the ceramics containing SrO features a high fracture toughness.
摘要翻译:含有不少于65质量%的Al 2 O 3和4〜34质量%的ZrO 2的氧化铝/氧化锆陶瓷,还含有TiO 2,MgO和SiO 2。 陶瓷有效抑制氧化铝形状各向同性颗粒的生长,抑制氧化锆颗粒的生长,并具有高强度和高硬度。 此外,含有SrO的陶瓷具有高断裂韧性。
摘要:
A composite ceramic of the present invention includes granular alumina particles (A) having an aspect ratio of 3 or less, granular zirconia particles (B) having an aspect ratio of 3 or less, and a columnar crystal (C) having an aspect ratio of 3 or more, the columnar crystal including a complex metal oxide containing an alkaline-earth metal element and aluminum element. The composite ceramic has high flexural strength, toughness, and hardness, and achieves excellent hot-water resistance and high flexural strength after hydrothermal degradation resistance test.
摘要:
Alumina/zirconia ceramics containing Al2O3 in an amount of not less than 65 mass % and ZrO2 in an amount of 4 to 34 mass %, and further containing TiO2, MgO and SiO2. The ceramics effectively suppresses the growth of shape isotropic particles of alumina, suppresses the growth of zirconia particles, and has a high strength and a high hardness. Besides, the ceramics containing SrO features a high fracture toughness.
摘要:
A cordierite sintered body and a member for semiconductor manufacturing apparatus are disclosed. The cordierite sintered body includes a crystal phase and an amorphous phase. The crystal phase includes a main crystal phase that essentially consists of cordierite crystal grains; and a sub crystal phase that includes sub crystal grains containing alumina, mullite or sapphirine. The amorphous phase contains calcium and is located at grain boundaries of the cordierite crystal grains and the sub crystal grains. A crystal phase proportion of the main crystal phase to the crystal phase (or total of the main crystal phase and the sub crystal phase) is 95% to 97.5% by mass or less. A crystal phase proportion of the sub crystal phase to the crystal phase is 2.5% to 5% by mass or less. The sintered body contains calcium by 0.4% to 0.6% by mass or less in terms of CaO.
摘要:
An alumina sintered article comprising 99.3 mass % or more Al in terms of Al2O3, strontium and silicon is disclosed. The alumina sintered article also comprises alumina crystal grains and an oxide crystal comprising aluminum, silicon, strontium located at a triple pocket surrounded by three or more alumina crystal grains. The alumina sintered article improves dielectric loss in the megahertz to gigahertz bands while maintaining corrosion resistance, mechanical properties of alumina.
摘要:
An alumina sintered article comprising 99.3 mass % or more Al in terms of Al2O3, strontium and silicon is disclosed. The alumina sintered article also comprises alumina crystal grains and an oxide crystal comprising aluminum, silicon, strontium located at a triple pocket surrounded by three or more alumina crystal grains. The alumina sintered article improves dielectric loss in the megahertz to gigahertz bands while maintaining corrosion resistance, mechanical properties of alumina.