[2] T UTSCHIG, P DESCHER, M RAUER et al. Metal ceramic substrates for highly reliable power modules-not only in electric vehicles. Interceram-International Ceramic Review, 69, 20(2020).

[4] M YAMAGIWA. Packaging technologies of power modules for hybrid electric vehicles and electric vehicles. Bulletin of the Ceramic Society of Japan, 45, 432(2010).

[5] J S HAGGERTY, A LIGHTFOOT. Opportunities for enhancing the thermal conductivities of SiC and Si₃N₄ ceramics through improved processing. Ceramic Engineering and Science Proceedings, 16: 475(1995).

[6] N HIROSAKI, S OGATA, C KOCER et al. Molecular dynamics calculation of the ideal thermal conductivity of single-crystal α- and β-Si₃N₄. Physical Review B, 65, 134110(2002).

[7] H ZHOU, T FENG. Theoretical upper limits of the thermal conductivity of Si₃N₄. Applied Physics Letters, 122, 182203(2023).

[8] K WATARI, K HIRAO, M E BRITO et al. Hot isostatic pressing to increase thermal conductivity of Si₃N₄ ceramics. Journal of Materials Research, 14, 1538(1999).

[9] Y ZHOU, H HYUGA, D KUSANO et al. A tough silicon nitride ceramic with high thermal conductivity. Advanced Materials, 23, 4563(2011).

[11] X ZHU, Y ZHOU, K HIRAO et al. Potential use of only Yb₂O₃ in producing dense Si₃N₄ ceramics with high thermal conductivity by gas pressure sintering. Science and Technology of Advanced Materials, 11, 065001(2010).

[12] M KITAYAMA, K HIRAO, K WATARI et al. Thermal conductivity of β-Si₃N₄: III, effect of rare earth (RE = La, Nd, Cd, Y, Yb, and Sc) oxide additives. Journal of the American Ceramic Society, 84, 353(2001).

[13] M KITAYAMA, K HIRAO, M TORIYAMA et al. Thermal conductivity of β-Si₃N₄: I, effects of various microstructural factors. Journal of the American Ceramic Society, 82, 3105(1999).

[14] M KITAYAMA, K HIRAO, A TSUGE et al. Thermal conductivity of β-Si₃N₄: II, effect of lattice oxygen. Journal of the American Ceramic Society, 83, 1985(2000).

[15] M KITAYAMA, K HIRAO, A TSUGE et al. Oxygen content in β-Si₃N₄ crystal lattice. Journal of the American Ceramic Society, 82, 3263(1999).

[16] S FU, Z C YANG, J T LI. Progress of high strength and high thermal conductivity Si₃N₄ ceramics for power module packaging. Journal of Inorganic Materials, 38, 1117(2023).

[17] Y ZHOU, H HYUGA, D KUSANO et al. Development of high-thermal-conductivity silicon nitride ceramics. Journal of Asian Ceramic Societies, 3, 221(2015).

[18] F ÇALIŞKAN, Z TATLI, A GENSON et al. Pressureless sintering of β-SiAlON ceramic compositions using fluorine and oxide additive system. Journal of the European Ceramic Society, 32, 1337(2012).

[19] F HU, L ZHAO, Z XIE. Silicon nitride ceramics with high thermal conductivity and excellent mechanical properties fabricated with MgF₂ sintering aid and post-sintering heat treatment. Journal of Ceramic Science and Technology, 7, 423(2016).

[20] C LUO, Y ZHANG, T DENG. Pressureless sintering of high performance silicon nitride ceramics at 1620 ℃. Ceramics International, 47, 29371(2021).

[21] B BAI, T FU, X NING. Thermal conductivity and mechanical property of Si₃N₄ ceramics sintered with CeF₃/LaF₃ additives. Advanced Materials Research, 105-106: 171(2010).

[22] S J LIAO, L ZHOU, C JIANG et al. Thermal conductivity and mechanical properties of Si₃N₄ ceramics with binary fluoride sintering additives. Journal of the European Ceramic Society, 41, 6971(2021).

[23] G HILLINGER, V HLAVACEK. Direct synthesis and sintering of silicon nitridenitanium nitride composite. Journal of the American Ceramic Society, 78, 495(1995).

[24] H HAYASHI, K HIRAO, M TORIYAMA et al. MgSiN₂ addition as a means of increasing the thermal conductivity of β-silicon nitride. Journal of the American Ceramic Society, 84, 3060(2001).

[25] G PENG, M LIANG, Z LIANG et al. Spark plasma sintered silicon nitride ceramics with high thermal conductivity using MgSiN₂ as additives. Journal of the American Ceramic Society, 92, 2122(2009).

[26] S FU, Z C YANG, H H LI et al. Mechanical properties and thermal conductivity of Si₃N₄ ceramics with composite sintering additives. Journal of Inorganic Materials, 37, 947(2022).

[27] F HU, T ZHU, Z XIE et al. Effect of composite sintering additives containing non-oxide on mechanical, thermal and dielectric properties of silicon nitride ceramics substrate. Ceramics International, 47, 13635(2021).

[28] J ZHANG, W CUI, F LI et al. Effects of MgSiN₂ addition and post-annealing on mechanical and thermal properties of Si₃N₄ ceramics. Ceramics International, 46, 15719(2020).

[31] Y LI, H KIM, H WU et al. Enhanced thermal conductivity in Si₃N₄ ceramic with the addition of Y₂Si₄N₆C. Journal of the American Ceramic Society, 101, 4128(2018).

[32] H LIANG, W WANG, K ZUO et al. Effect of LaB₆ addition on mechanical properties and thermal conductivity of silicon nitride ceramics. Ceramics International, 46, 17776(2020).

[33] S M BOYER, A J MOULSON. A mechanism for the nitridation of Fe-contaminated silicon. Journal of Materials Science, 13, 1637(1978).

[34] J MUKERJI, S K BISWAS. Effect of iron, titanium, and hafnium on second-stage nitriding of silicon. Journal of the American Ceramic Society, 64, 549(1981).

[35] L WANG, Q QI, P CAI et al. New route to improve the fracture toughness and flexural strength of Si₃N₄ ceramics by adding FeSi₂. Scripta Materialia, 126: 11(2017).

[36] W D WANG, D YAO, H CHEN et al. ZrSi₂-MgO as novel additives for high thermal conductivity of β-Si₃N₄ ceramics. Journal of the American Ceramic Society, 103, 2090(2020).

[37] P SAJGALIK, J DUSZA, M J HOFFMANN. Relationship between microstructure, toughening mechanisms, and fracture-toughness of reinforced silicon-nitride ceramics. Journal of the American Ceramic Society, 78, 2619(1995).

[38] H PARK, H E KIM, K NIIHARA. Microstructural evolution and mechanical properties of Si₃N₄ with Yb₂O₃ as a sintering additive. Journal of the American Ceramic Society, 80, 750(1997).

[39] W D WANG, D YAO, H Q LIANG et al. Effect of the binary nonoxide additives on the densification behavior and thermal conductivity of Si₃N₄ ceramics. Journal of the American Ceramic Society, 103, 5891(2020).

[40] M YAN, Y LIU, Y LIU et al. Simultaneous gettering of oxygen and chlorine and homogenization of the β phase by rare earth hydride additions to a powder metallurgy Ti-2.25Mo-1.5Fe alloy. Scripta Materialia, 67, 491(2012).

[41] S HAMPSHIRE. Oxynitride glasses. Journal of the European Ceramic Society, 28, 1475(2008).

[42] H LEMERCIER, T ROUXEL, D FARGEOT et al. Yttrium SiAlON glasses: structure and mechanical properties-elasticity and viscosity. Journal of Non-Crystalline Solids, 201, 128(1996).

[43] A S HAKEEM, R DAUC, E LEONOVA et al. Silicate glasses with unprecedented high nitrogen and electropositive metal contents obtained by using metals as precursors. Advanced Materials, 17, 2214(2005).

[44] W D WANG, D YAO, H Q LIANG et al. Effect of in-situ formed Y₂O₃ by metal hydride reduction reaction on thermal conductivity of β-Si₃N₄ ceramics. Journal of the European Ceramic Society, 40, 5316(2020).

[45] W D WANG, H B CHEN, S H LI et al. Preparation of silicon nitride with high thermal conductivity and high flexural strength using YbH₂-MgO as sintering additive. Journal of Inorganic Materials, 36, 959(2021).

[46] W D WANG, D YAO, H LIANG et al. Improved thermal conductivity of β-Si₃N₄ ceramics through the modification of the liquid phase by using GdH₂ as a sintering additive. Ceramics International, 47, 5631(2021).

[47] W D WANG, D YAO, H LIANG et al. Enhanced thermal conductivity in Si₃N₄ceramics prepared by using ZrH₂ as an oxygen getter. Journal of Alloys and Compounds, 855: 157451(2021).

[48] Y DUAN, J ZHANG, X LI et al. High thermal conductivity silicon nitride ceramics prepared by pressureless sintering with ternary sintering additives. International Journal of Applied Ceramic Technology, 16, 1399(2019).

[50] H LUO, C LI, L DENG et al. C_0.3N_0.7Ti-SiC toughed silicon nitride hybrids with non-oxide additives Ti₃SiC₂. Materials, 13, 1428(2020).

[51] B LEE, D LEE, J H LEE. Enhancement of toughness and wear resistance in boron nitride nanoplatelet (BNNP) reinforced Si₃N₄ nanocomposites. Scientific Reports, 6: 27609(2016).

[52] H LIANG, W WANG, K ZUO et al. YB₂C₂: a new additive for fabricating Si₃N₄ ceramics with superior mechanical properties and medium thermal conductivity. Ceramics International, 46, 5239(2020).

[53] M HUANG, Y HUANG, J OU et al. Effect of a new nonoxide additive, Y₃Si₂C₂, on the thermal conductivity and mechanical properties of Si₃N₄ ceramics. International Journal of Applied Ceramic Technology, 19, 3403(2022).

[54] K WATARI, M KAWAMOTO, K ISHIZAKI. Carbon behavior in sintered silicon nitride grain boundaries. Materials Science and Engineering A, 109: 89(1989).

[55] M HNATKO, P SAJGALIK, Z LENČÉŠ et al. Carbon reduction reaction in the Y₂O₃-SiO₂ glass system at high temperature. Journal of the European Ceramic Society, 21, 2797(2001).

[56] H D KIM, B D HAN, D S PARK et al. Novel two-step sintering process to obtain a bimodal microstructure in silicon nitride. Journal of the American Ceramic Society, 85, 245(2002).

[57] Y LI, H KIM, H WU et al. Improved thermal conductivity of sintered reaction-bonded silicon nitride using a BN/graphite powder bed.. Journal of the European Ceramic Society, 37, 4483(2017).

[58] Y LI, H KIM, H WU et al. Enhanced thermal conductivity in Si₃N₄ ceramic by addition of a small amount of carbon. Journal of the European Ceramic Society, 39, 157(2019).

[59] D LU, P YANG, Y HUANG et al. Enhanced thermal conductivity in Si₃N₄ ceramics by carbonizing polydopamine coatings. Ceramics International, 48, 18615(2022).

[61] M LINDLEY, K PITMAN, B JONES et al. The influence of hydrogen in the nitriding gas on the strength, structure and composition of reaction-sintered silicon nitride. Journal of Materials Science, 14, 70(1979).

[62] W D WANG, D YAO, H LIANG et al. Novel silicothermic reduction method to obtain Si₃N₄ ceramics with enhanced thermal conductivity and fracture toughness. Journal of the European Ceramic Society, 41, 1735(2021).