摘要:
A thermomagnetic generator which converts thermal energy to electrical energy without intermediate conversion to mechanical work and which works at temperatures in the range from −20° C. to 200° C. comprises a thermomagnetic material selected from, for example, (1) compounds of the general formula (I) (AyBy−1)2+δCwDxEz (I) where A is Mn or Co, B is Fe, Cr or Ni, C, D and E at least two of C, D and E are different, have a non-vanishing concentration and are selected from P, B, Se, Ge, Ga, Si, Sn, N, As and Sb, where at least one of C, D and E is Ge or Si, δ is a number in the range from −0.1 to 0.1, w, x, y, z are numbers in the range from 0 to 1, where w+x+z=1.
摘要翻译:将热能转换为电能而不中间转换为机械作用且在-20℃至200℃的温度范围内工作的热磁发生器包括选自例如(1) C,D和E中的至少两个是通式(I)(AyBy-1)2 +δCwDxEz(I),其中A是Mn或Co,B是Fe,Cr或Ni,C,D和E, 选自P,B,Se,Ge,Ga,Si,Sn,N,As和Sb,其中C,D和E中的至少一个为Ge或Si,δ为 范围从-0.1到0.1,w,x,y,z是从0到1的范围内的数字,其中w + x + z = 1。
摘要:
A thermomagnetic generator which converts thermal energy to electrical energy without intermediate conversion to mechanical work and which works at temperatures in the range from −20° C. to 200° C. comprises a thermomagnetic material selected from, for example, (1) compounds of the general formula (I) (AyBy−1)2+δCwDxEz (I) where A is Mn or Co, B is Fe, Cr or Ni, C, D and E at least two of C, D and E are different, have a non-vanishing concentration and are selected from P, B, Se, Ge, Ga, Si, Sn, N, As and Sb, where at least one of C, D and E is Ge or Si, δ is a number in the range from −0.1 to 0.1, w, x, y, z are numbers in the range from 0 to 1, where w+x+z=1.
摘要翻译:将热能转换为电能而不中间转换为机械作用且在-20℃至200℃的温度范围内工作的热磁发生器包括选自例如(1) C,D和E中至少有两个是通式(I)(AyBy-1)2 + deltaCwDxEz(I),其中A是Mn或Co,B是Fe,Cr或Ni,C,D和E, 选自P,B,Se,Ge,Ga,Si,Sn,N,As和Sb中的至少一个,其中C,D和E中的至少一个为Ge或Si,δ为 范围从-0.1到0.1,w,x,y,z是从0到1的范围内的数字,其中w + x + z = 1。
摘要:
The process for preparing metal-based materials for magnetic cooling or heat pumps comprises the following steps: a) reacting chemical elements and/or alloys in a stoichiometry which corresponds to the metal-based material in the solid phase and/or liquid phase, b) if appropriate converting the reaction product from stage a) to a solid, c) sintering and/or heat treating the solid from stage a) or b), d) quenching the sintered and/or heat treated solid from stage c) at a cooling rate of at least 100 K/s.
摘要:
In a process for producing organic substrate particles bonded to switchable ferromagnetic nanoparticles with a mean particle diameter in the range from 10 to 1000 nm, the ferromagnetic nanoparticles used are those nanoparticles which are nonferromagnetic at first, but become ferromagnetic when the temperature is lowered, these at first nonferromagnetic nanoparticles in dispersed form are bonded to the organic substance particles, and then the nanoparticles bonded to the substrate particles are made ferromagnetic as a result of the temperature being lowered.
摘要:
The invention relates to a method for generating giant magnetocaloric materials, the giant magnetocaloric materials obtained thereby and their use in magnetocaloric heat pumps, magnetocaloric power converters, actuators or magnetic switches.