摘要:
To provide an electron emitter, a field emission display unit, a cold cathode fluorescent tube and a flat type lighting device, which employ an electron emitting material producible at a low cost and in a large amount.A conductive mayenite type compound powder containing at least 50 mol % of a mayenite type compound represented by a chemical formula of either 12CaO.7Al2O3 or 12SrO.7Al2O3 and having a maximum particle size of at most 100 μm, is used as an electron emitter, whereby an electron emitter, a field emission display unit, a cold cathode fluorescent tube and a flat type lighting device, are realized that are easy to produce and capable of emitting electrons even at a low applied voltage and whereby a large current can be obtained per the same applied voltage surface.
摘要翻译:提供一种电子发射器,场发射显示单元,冷阴极荧光管和平面照明装置,其采用可以低成本和大量生产的电子发射材料。 一种含有至少50mol%由化学式表示的钙铝石型化合物的导电钙铝石型化合物粉末,其化学式为12CaO.7Al 2 O 3 3或12SrO.7Al
摘要:
Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost without need for expensive facilities, a reaction at high temperature and for a long period of time, or complicated control of reaction.A method for preparing an electroconductive mayenite type compound comprises a step of subjecting a precursor to heat treatment, wherein the precursor contains Ca and/or Sr, and Al, a molar ratio of (a total of CaO and SrO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, a total content of CaO, SrO and Al2O3 in the precursor is at least 50 mol %, and the precursor is a vitreous or crystalline material; and the method comprises a step of mixing the precursor with a reducing agent and performing the heat treatment of holding the mixture at 600-1,415° C. in an inert gas or vacuum atmosphere with an oxygen partial pressure of at most 10 Pa.
摘要翻译:本发明提供一种低成本地容易且稳定地制备具有良好性能的导电性钙铝石型化合物的方法,而不需要昂贵的设备,高温反应和长时间的反应或复杂的反应控制。 制备导电性钙铝石型化合物的方法包括使前体进行热处理的步骤,其中前体含有Ca和/或Sr,和Al,(CaO和SrO:Al 2 O 3的总和)的摩尔比为( 12.6:6.4)至(11.7:7.3),前体中CaO,SrO和Al2O3的总含量为至少50摩尔%,前体为玻璃态或结晶性材料; 该方法包括将前体与还原剂混合并在氧分压至多10Pa的惰性气体或真空气氛中进行600-1,415℃保持混合物的热处理的步骤。
摘要:
Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost.A production method of an electroconductive mayenite type compound comprising a step of subjecting a precursor to heat treatment, is a method for preparing an electroconductive mayenite type compound, comprising a step of subjecting a precursor to heat treatment; wherein the precursor is a vitreous or crystalline material, which contains Ca and Al, in which a molar ratio of (CaO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, and in which a total amount of CaO and Al2O3 is at least 50 mol %, and wherein the heat treatment is heat treatment comprising holding the precursor at a heat treatment temperature T of from 600 to 1415° C. and in an inert gas or vacuum atmosphere with an oxygen partial pressure PO2 in a range ofPO2≦105×exp [{−7.9×l04/(T+273)}+14.4] in the unit of Pa.
摘要翻译:提供了一种以低成本容易且稳定地制备具有良好性能的导电性钙铝石型化合物的方法。 包括对前体进行热处理的步骤的导电性钙铝石型化合物的制造方法是制备导电性钙铝石型化合物的方法,包括使前体进行热处理的工序; 其中所述前体是含有Ca和Al的玻璃质或结晶材料,其中(CaO:Al 2 O 3)的摩尔比为(12.6:4.4)至(11.7:7.3),其计算为氧化物,其中总计 CaO和Al 2 O 3的量为至少50摩尔%,其中热处理为热处理,包括将前体保持在600-1415℃的热处理温度T下,在惰性气体或具有氧部分的惰性气体或真空气氛中 在PO2&NlE的范围内的压力PO2为105×exp [{-7.9×104 /(T + 273)} + 14.4]。
摘要:
To provide a method for preparing a mayenite type compound having electroconductivity imparted.A method for preparing an electroconductive mayenite type compound, which comprises melting a raw material containing Al and at least one element selected from the group consisting of Ca and Sr, holding the melt in a low oxygen partial pressure atmosphere having an oxygen partial pressure of not higher than 10 Pa, followed by cooling or annealing in a low oxygen partial pressure atmosphere or in atmospheric air for solidification, thereby to replace oxygen present in cages by electrons in a high concentration.
摘要:
Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost without need for expensive facilities, a reaction at high temperature and for a long period of time, or complicated control of reaction. A method for preparing an electroconductive mayenite type compound comprises a step of subjecting a precursor to heat treatment, wherein the precursor contains Ca and/or Sr, and Al, a molar ratio of (a total of CaO and SrO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, a total content of CaO, SrO and Al2O3 in the precursor is at least 50 mol %, and the precursor is a vitreous or crystalline material; and the method comprises a step of mixing the precursor with a reducing agent and performing the heat treatment of holding the mixture at 600-1,415° C. in an inert gas or vacuum atmosphere with an oxygen partial pressure of at most 10 Pa.
摘要翻译:本发明提供一种低成本地容易且稳定地制备具有良好性能的导电性钙铝石型化合物的方法,而不需要昂贵的设备,高温反应和长时间的反应或复杂的反应控制。 制备导电性钙铝石型化合物的方法包括以下步骤:将前体进行热处理,其中前体含有Ca和/或Sr,和Al,(CaO和SrO:Al 2的总和的摩尔比 (12.6:4.4)至(11.7:7.3)按氧化物计算,CaO,SrO和Al 2 O 2的总含量 前体中的3 <3>至少为50摩尔%,前体是玻璃状或结晶的材料; 该方法包括将前体与还原剂混合并在氧分压至多10Pa的惰性气体或真空气氛中进行600-1,415℃保持混合物的热处理的步骤。
摘要:
Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost. A production method of an electroconductive mayenite type compound comprising a step of subjecting a precursor to heat treatment, is a method for preparing an electroconductive mayenite type compound, comprising a step of subjecting a precursor to heat treatment; wherein the precursor is a vitreous or crystalline material, which contains Ca and Al, in which a molar ratio of (CaO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, and in which a total amount of CaO and Al2O3 is at least 50 mol %, and wherein the heat treatment is heat treatment comprising holding the precursor at a heat treatment temperature T of from 600 to 1415° C. and in an inert gas or vacuum atmosphere with an oxygen partial pressure PO2 in a range of PO2≦105×exp[{−7.9×l04/(T+273)}+14.4] in the unit of Pa.
摘要翻译:提供了一种以低成本容易且稳定地制备具有良好性能的导电性钙铝石型化合物的方法。 包括对前体进行热处理的步骤的导电性钙铝石型化合物的制造方法是制备导电性钙铝石型化合物的方法,包括使前体进行热处理的工序; 其中所述前体是含有Ca和Al的玻璃质或结晶材料,其中(CaO:Al 2 O 3 3)的摩尔比为(12.6:6.4) )至(11.7:7.3),其中CaO和Al 2 O 3 3的总量为至少50摩尔%,其中热量 处理是热处理,包括将前体保持在600-1415℃的热处理温度T下,在氧分压P
摘要:
To provide a method for preparing a mayenite type compound having electroconductivity imparted. A method for preparing an electroconductive mayenite type compound, which comprises melting a raw material containing Al and at least one element selected from the group consisting of Ca and Sr, holding the melt in a low oxygen partial pressure atmosphere having an oxygen partial pressure of not higher than 10 Pa, followed by cooling or annealing in a low oxygen partial pressure atmosphere or in atmospheric air for solidification, thereby to replace oxygen present in cages by electrons in a high concentration.
摘要:
It is an object of the present invention to provide a method and apparatus for efficiently remove bubbles present on a surface of molten glass, which can solve a problem that bubbles remaining on a surface of molten glass are get inside at a time of forming the glass to cause inside bubbles, to thereby provide a glass substrate of good quality, and which can improve productivity of glass substrates; and to provide a process for producing glass employing the above method for removing bubbles.The present invention provides a method for removing bubbles from molten glass, which is a method for removing floating bubbles on a surface of molten glass, wherein a floating bubble on the surface of molten glass is irradiated with at least one laser beam.
摘要:
It is an object of the present invention to provide a new method for reducing the diameter of a bubble existing in a glass plate. Specifically, the present invention provides a method for reducing the diameter of a bubble existing in a glass plate, which comprises irradiating the vicinity of the bubble existing in the glass plate with a light beam emitted from a light source, to raise the temperature of the glass in the vicinity of the bubble to at least the melting point of the glass to reduce the maximum diameter of the bubble.
摘要:
An electrode for a discharge lamp is provided with a mayenite compound in at least a part of the electrode that emits secondary electrons, and a surface of a surface layer of the mayenite compound is plasma treated.