Abstract:
An electric heater, and an apparatus, a heating and air conditioning system and a vehicle, each comprising the electric heater, are provided. The electric heater comprises an outer frame; a heating core configured to connect to a power source and disposed within the outer frame; and a sealing-waterproof glue member disposed within the outer frame and configured to encase at least one end of the heating core. The heating core further comprises: a plurality of heat dissipating components and heating components arranged alternately, and each of the heat dissipating component is coupled with a heating component via a thermal conductor. Each of the heating components further comprises a core tube and a positive temperature coefficient thermistor disposed in the core tube.
Abstract:
A ceramic and a preparation method therefor are provided. The ceramic includes a zirconia matrix, and an additive dispersed inside and on an outer surface of the zirconia matrix. The additive is an oxide including elements A and B, where A is selected from at least one of Ca, Sr, Ba, Y, and La, and B is selected from at least one of Cr, Mn, Fe, Co, and Ni.
Abstract:
A metal-ceramic composite includes a ceramic substrate and a metallic composite. A groove is formed in a surface of the ceramic substrate and the metallic composite is filled in the groove. The metallic composite includes a Zr based alloy-A composite. A includes at least one selected from a group consisting of W, Mo, Ni, Cr, stainless steel, WC, TiC, SiC, ZrC and ZrO2. Based on the total volume of the Zr based alloy-A composite, the content of A is about 30% to about 70% by volume. A method for preparing the metal-ceramic composite is also provided.
Abstract:
A method for selectively metallizing a surface of a ceramic substrate, a ceramic product and use of the ceramic product are provided. The method comprises steps of: A) molding and sintering a ceramic composition to obtain the ceramic substrate, in which the ceramic composition comprises a ceramic powder and a functional powder dispersed in the ceramic powder; the ceramic powder is at least one selected from a group consisting of an oxide of E, a nitride of E, a oxynitride of E, and a carbide of E; E at least one selected from a group consisting of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, B, Al, Ga, Si, Ge, P, As, Sc, Y, Zr, Hf, is and lanthanide elements; the functional powder is at least one selected from a group consisting of an oxide of M, a nitride of M, a oxynitride of M, a carbide of M, and a simple substance of M; and M is at least one selected from a group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, Ta, W, Re, Os, Ir, Pt, Au, In, Sn, Sb, Pb, Bi, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; B) radiating a predetermined region of the surface of the ceramic substrate using an energy beam to form a chemical plating active center on the predetermined region of the surface of the ceramic substrate; and C) performing chemical plating on the ceramic substrate formed with the chemical plating active center to form a metal layer on the predetermined region of the surface of the ceramic substrate.
Abstract:
A Zr-based composite ceramic material, a preparation method thereof and a shell or a decoration are provided. The Zr-based composite ceramic material includes a zirconia matrix and a cubic SrxNbO3 stable phase dispersed within the zirconia matrix, where 0.7≤x≤0.95.
Abstract:
A zirconia ceramic includes the following elements: 60.5-70.5 wt % of Zr, 2.5-5.45 wt % of Y, 0.05-2.65 wt % of Al, 0.015-1.07 wt % of Si, and 0.34-2.8 wt % of M. M includes at least one of Nb or Ta. The zirconia ceramic has a phase composition which includes tetragonal zirconia, alumina and zirconium silicate. The total content of alumina and zirconium silicate is 0.2-12 wt %, and the content of the tetragonal zirconia is 84-99.3 wt %. The tetragonal zirconia includes a solid solution of zirconia formed with yttrium oxide and MxOy, x satisfies 1≤x≤3, and y satisfies 3≤y≤6.
Abstract:
The present disclosure relates to the field of ceramics, and discloses a metal-based aluminum nitride composite material. The composite material includes an aluminum nitride ceramic skeleton and a metal filling at least part of pores of the aluminum nitride ceramic skeleton. The aluminum nitride ceramic skeleton contains aluminum nitride and CuAlO2, and the aluminum nitride ceramic skeleton has a porosity of 20 to 40 percent. The present disclosure further discloses a method for preparing the metal-based aluminum nitride composite material and the metal-based aluminum nitride composite material obtained by the method. A CuAlO2 substance is formed in the aluminum nitride ceramic skeleton obtained in the present disclosure.
Abstract:
Embodiments of the present disclosure are directed to a circuit board. The circuit board comprises: an aluminum-based substrate; an alumina layer formed on at least one surface of the aluminum-based substrate; and a circuit layer formed on the alumina layer. The alumina layer comprises alumina and an element selected from a group consisting of chromium, nickel, a rare earth metal, and a combination thereof.
Abstract:
A Zr-based composite ceramic material, a preparation method thereof, and a shell or decoration are provided. The Zr-based composite ceramic material includes a zirconia matrix, a cubic Sr0.82NbO3 stable phase, a Ca10(PO4)6(OH)2 phase, and a SrAl12O19 phase, and the cubic Sr0.82NbO3 stable phase, the Ca10(PO4)6(OH)2 phase and the SrAl12O19 phase are dispersed within the zirconia matrix.
Abstract:
The present disclosure provides a metal-ceramic composite structure and a fabrication method thereof. The metal-ceramic composite structure includes a ceramic substrate having a groove on a surface thereof; a metal member filled in the groove, including a main body made of zirconium base alloy, and a reinforcing material dispersed in the main body and selected from at least one of W, Mo, Ni, Cr, stainless steel, WC, TiC, SiC, ZrC, ZrO2, BN, Si3N4, TiN and Al2O3; a luminance value L of the metal member surface is in a range of 36.92-44.07 under a LAB Chroma system.