Abstract: A main and auxiliary alloy-based neodymium-iron-boron magnet material and the preparation method thereof. The raw material composition for the main and auxiliary alloy-based neodymium-iron-boron magnet material includes a main alloy raw material and an auxiliary alloy raw material, wherein the mass percentage of the auxiliary alloy raw material in the raw material composition for the main and auxiliary alloy-based neodymium-iron-boron magnet material is 1.0-15.0 mass %. For the main and auxiliary alloy-based neodymium-iron-boron magnet material prepared by using the raw material composition, the coercivity is increased while high remanence is ensured, and the preparation method therefor can be suitable for engineering applications.

Abstract: An RIB-based permanent magnet material, a preparation method thereof, and an application thereof. The RIB-based permanent magnet material comprises the following components: R?: 29.5 to 33.5 wt. %, wherein R? comprises Pr, and the content of Pr is ?8.85 wt. %; C:0.106 to 0.26 wt. %; O: ?0.07 wt. %; X: 0 to 5.0 wt. %, wherein X is one or more of Cu, Al, Ga, Co, Zr, Ti, Nb and Mn; B:0.90 to 1.2 wt. %; and Fe:61.4 to 69.5 wt. %. The RIB-based permanent magnet material can improve the performance of a permanent magnet material without employing heavy rare earths. There is no need to control the content of carbon introduced in the process, and the magnet exhibits excellent performance even with a high carbon content.

Abstract: A hollow ice-making forming mold comprises an inner membrane (1) which is in a fixed shape after charging air and an outer membrane (2) which is in a fixed shape after liquid injection and is disposed outside the inner membrane (1); a base plate (3) is arranged at the bottom of the outer membrane (2); the bottoms of the inner and outer membranes are hermetically connected with the base plate (3) respectively, wherein an airtight air chamber (5) is formed between the inner membrane (1) and the base plate (3), and a cavity (6) for pouring cooling liquid is formed between the inner membrane (1) and the outer membrane (2); an air filling and water injecting member (4) is provided at the top of the inner membrane (1); a top part of the outer membrane (2) is connected with an upper part of the air filling and water injecting member (4) by a detachable way.

Abstract: A hollow ice-making forming mould comprises an inner membrane(1) which is in a fixed shape after charging air and an outer membrane (2) which is in a fixed shape after liquid injection and is disposed outside the inner membrane (1); a base plate(3) is arranged at the bottom of the outer membrane (2); the bottoms of the inner and outer membranes are hermetically connected with the base plate(3) respectively, wherein an airtight air chamber(5) is formed between the inner membrane (1) and the base plate(3), and a cavity(6) for pouring cooling liquid is formed between the inner membrane (1) and the outer membrane (2); an air filling and water injecting member(4) is provided at the top of the inner membrane (1); a top part of the outer membrane (2) is connected with an upper part of the air filling and water injecting member(4) by a detachable way.