摘要:
The invention relates to a melted grain essentially consisting of a matrix of a magnesium and aluminium oxide of a spinel structure MgA1 2 O 4 and/or eutectic structure MgO-MgA1 2 O 4 and inclusions essentially consisting of magnesium oxide, said grain having the following overall chemical composition, in weight percentages expressed in the form of oxides: more than 5.0% and less than 19.9% of A1 2 O 3 ; A1 2 O 3 and MgO together representing more than 95.0% of the weight of said grain, said grain being characterised in that the cumulated content of CaO and ZrO 2 is less than 4000 ppm, in weight. The invention also relates to a ceramic product or material produced by sintering said grains.
摘要:
Fused grain essentially composed of a matrix of a magnesium aluminium oxide of spinel structure MgAl 2 O 4 and/or of the MgO-MgAl 2 O 4 eutectic, said matrix comprising inclusions essentially composed of magnesium oxide, said grain exhibiting the following overall chemical composition, as percentages by weight expressed in the form of oxides: - more than 20.0% and less than 50.0% of Al 2 O 3 , - Al 2 O 3 and MgO together represent more than 95.0% of the weight of said grain, said grain being characterized in that the cumulative content of CaO and ZrO 2 is less than 4000 ppm by weight. Ceramic product or material obtained by sintering said grains.
摘要翻译:熔融晶粒主要由尖晶石结构MgAl 2 O 4和/或MgO-MgAl 2 O 4共晶的镁铝氧化物基体组成,该基体包含基本上由氧化镁组成的夹杂物,该晶体呈现以下总体化学组成,其百分比为 以氧化物的形式表示的重量:大于20.0%且小于50.0%的Al2O3,Al2O3和MgO一起占颗粒重量的95.0%以上,其中CaO和ZrO 2的累积含量小于4000ppm 重量。
摘要:
The invention relates to molten grains having the following chemical composition, in wt % on the basis of oxides: more than 15% and less than 55% of Al 2 O 3 ; more than 25% and less than 60% of TiO 2 ; less than 20%, in total, of at least one oxide of an element M1 selected from among MgO and CoO; more than 0.7% and less than 20%, in total, of at least one oxide of an element M2 selected from within the group consisting of Fe 2 O 3 , Cr 2 O 3 , MnO 2 , La 2 O 3 , Y 2 O 3 , and Ga 2 O 3 , and less than 20%, in total, of at least one oxide of an element M3 selected from within the group consisting of ZrO 2 , Ce 2 O 3 , and HfO 2 ; and less than 30% of SiO 2 . The invention further relates to a ceramic product or material that is obtained by sintering said grains.
摘要:
Fused grains having the following chemical composition, in weight percentages on the basis of the oxides: more than 15% of Al 2 O 3 and less than 55% of Al 2 O 3 , - more than 20% and less than 45% of TiO 2 , - more than 3% and less than 30% of SiO 2 , - less than 20%, in total, of at least one oxide chosen from ZrO 2 , Ce 2 O 3 , HfO 2 , - less than 1% of MgO, - a total sum amount of the oxides CaO, Na 2 O, K 2 O, SrO, B 2 O 3 , BaO greater than 1% and less than 15%. Ceramic product or material obtained by sintering said grains.
摘要:
The invention relates to fused grains, said grains comprising a spinel-zirconia eutectic matrix encapsulating inclusions essentially formed by a zirconia phase or a spinel phase. The overall chemical composition of the grains is as follows, expressed by weight percent in the form of oxides: more than 45.0% and less than 95.0% Zr02; more than 3.0% and less than 40.0% Al203; more than 1.0% and less than 20.0% MgO; Zr02, Al2O3 and MgO together representing at least 95.0% of the weight of the grains.
摘要:
The invention relates to polymer/ceramic composites, particularly for the electronics field. Said composites comprise: - grains of titanium suboxide having the general formula TiO x , wherein x is between 1.00 and 1.99 inclusive; and/or - barium titanate suboxides and/or strontium titanate suboxides taking the general formula Ba (1-m) Sr m TiO y , wherein y is between 1.50 and 2.99 inclusive, and m is between 0 and 1 inclusive.
摘要:
The invention relates to a porous structure including an oxide ceramic material comprising, on the basis of the corresponding simple oxides: Al 2 O 3 ; TiO 2 ; at least one oxide of an element, M 2 , selected from the group containing Fe 2 O 3 , Cr 2 O 3 , MnO 2 , La 2 O 3 , Y 2 O 3 , Ga 2 O 3 ; at least one oxide of an element, M 3 , selected from the group containing ZrO 2 , Ce 2 O 3 , HfO 2 ; and optionally at least one oxide of an element, M 1 , selected from among MgO, CoO and optionally SiO 2 , said material being obtained by the reactive sintering of the corresponding simple oxides or one of the precursors thereof or by the heat treatment of sintered grains having said composition.
摘要翻译:本发明涉及包含氧化物陶瓷材料的多孔结构,所述氧化物陶瓷材料基于相应的简单氧化物包含Al 2 O 3; TiO 2; 至少一种选自包含Fe 2 O 3,Cr 2 O 3,MnO 2,La 2 O 3,Y 2 O 3,Ga 2 O 3的元素的氧化物M 2; 至少一种选自ZrO 2,Ce 2 O 3,HfO 2的元素M 3的氧化物; 以及任选地至少一种选自MgO,CoO和任选SiO 2的元素M 1的氧化物,所述材料通过反应烧结相应的简单氧化物或其前体之一或通过烧结的热处理而获得 具有所述组成的颗粒。