摘要:
A process for manufacturing a sintered ceramic composite, based on silicon nitride and β-eucryptite, includes a step of producing a first powder blend, consisting of a powder of silicon nitride in crystalline form and a powder of a first lithium aluminosilicate in crystalline form, the composition of which is the following: (Li2O)x(Al2O3)y(SiO2)z, the lithium aluminosilicate composition being such that the set of molar fractions (x,y,z) is different from the set (1,1,2).
摘要翻译:用于制造基于氮化硅和β-堇青石的烧结陶瓷复合材料的方法包括生产由结晶形式的氮化硅粉末和晶体形式的第一铝硅酸铝粉末组成的第一粉末掺合物的步骤, 其组成如下:(Li 2 O)x(Al 2 O 3)y(SiO 2)z,铝硅酸铝组合物使得摩尔分数(x,y,z)的集合不同于组(1,1, 2)。
摘要:
The wristwatch with a reversible case (12) is provided with a wristband, each end strand of which includes an insert (30) which is pivotably and slidably mounted on the case (12) via a trunnion (32). Each insert (30) includes at least two indexed angular positions, which respectively correspond to two positions of use of the case (12), and at least one longitudinal rest position wherein the insert (30) is blocked from pivoting by a male element (36) fitting inside a female element (38), one of the elements (36) being arranged on the case (12), the other element (38) being arranged on the insert (30), and a longitudinal pivoting position wherein the insert (30) is shifted longitudinally outwards and wherein the insert (30) is free to pivot. The invention is characterized in that each trunnion (32) includes a first indexing element (48), which cooperates with a second indexing element (64, 66) arranged on the case (12) so as to index the insert (30) longitudinally.
摘要:
The invention relates to a composite ceramic material which comprises: (a) a first phase based on zirconia containing CeO2 as stabilizer, and (b) a second phase based on an aluminate. The invention also relates to a ceramic powder composition, processes for the preparation of the composite ceramic material and the ceramic powder composition as well as uses thereof.
摘要:
A process for manufacturing a sintered ceramic composite, based on silicon nitride and β-eucryptite, includes a step of producing a first powder blend, consisting of a powder of silicon nitride in crystalline form and a powder of a first lithium aluminosilicate in crystalline form, the composition of which is the following: (Li2O)x (Al2O3)y (SiO2)z, the lithium aluminosilicate composition being such that the set of molar fractions (x,y,z) is different from the set (1,1,2).
摘要翻译:制造基于氮化硅和重晶石的烧结陶瓷复合材料的方法包括生产由结晶形式的氮化硅粉末和晶体形式的第一铝硅酸铝粉末组成的第一粉末共混物的步骤 ,其组成如下:(Li 2 O)x(Al 2 O 3)y(SiO 2)z,铝硅酸铝组合物使得该组摩尔分数(x,y,z)与组(1,1 ,2)。
摘要:
The invention relates to compositions based on Ce-stabilized ZrO2, and single- and multi-colored blanks made from oxide ceramics, and a process for their preparation, in which oxide ceramic powder is coated with a coloring substance, the coated powders are preferably graded and at least one colored powder is filled into a compression mould, the colored powder or powders are compressed to produce a shaped body, and the compressed shaped body is sintered to produce a blank, and to the use of these blanks for the preparation of dental restorations. The compositions exhibit high fracture toughness and high flexural strength.
摘要:
A composite having a coefficient of thermal expansion less than 1.3×10−6 K−1 is a sintered ceramic based on an oxide and on β-eucryptite crystals having a β-eucryptite content of less than 55% by weight (69% by volume).
摘要:
The invention proposes a timepiece (10) including a striking mechanism (20), and including a control device (28) for activating an element (22) releasing the striking mechanism (20), via a control surface (64) carried by a piston (32), characterized in that a resilient transmission element (68) is arranged between the piston (32) and the release element (22) and in that the travel of the piston (32) includes an active travel, from the rest position of the piston (32) to an intermediate position corresponding to the stop position of the release element (22), during which the travel of the piston (32) is connected to the travel of the release element (22) via the resilient transmission element (68), and a passive travel during which the piston (32) slides against the resilient transmission element (68).