1. 炭化ケイ素の結晶学と材料原理
1.1 SiC の多形性と原子結合
(炭化ケイ素セラミックプレート)
炭化ケイ素 (SiC) is a covalent ceramic compound made up of silicon and carbon atoms in a 1:1 stoichiometric proportion, distinguished by its amazing polymorphism– 以上 250 よく知られたポリタイプ– all sharing strong directional covalent bonds but varying in stacking series of Si-C bilayers.
One of the most technologically relevant polytypes are 3C-SiC (cubic zinc blende structure), および六方晶系の 4H-SiC および 6H-SiC, each showing refined variations in bandgap, electron flexibility, and thermal conductivity that influence their viability for particular applications.
Siのタフさ– C結合, with a bond power of around 318 kJ/モル, underpins SiC’s phenomenal firmness (モース硬度 9– 9.5), 高い融解係数 (～ 2700 ℃), and resistance to chemical degradation and thermal shock.
セラミックプレートで, the polytype is generally selected based upon the meant use: 6H-SiC prevails in architectural applications due to its ease of synthesis, while 4H-SiC dominates in high-power electronics for its exceptional fee carrier flexibility.
大きなバンドギャップ (2.9– 3.3 eV depending upon polytype) also makes SiC an excellent electrical insulator in its pure form, though it can be doped to function as a semiconductor in specialized electronic tools.
1.2 セラミックプレートの微細構造とステージ純度
The efficiency of silicon carbide ceramic plates is critically dependent on microstructural attributes such as grain dimension, 厚さ, ステージの均一性, and the visibility of secondary stages or impurities.
High-grade plates are usually fabricated from submicron or nanoscale SiC powders via advanced sintering methods, きめの細かい, completely dense microstructures that optimize mechanical strength and thermal conductivity.
Pollutants such as complimentary carbon, シリカ (SiO₂), or sintering help like boron or aluminum have to be carefully controlled, as they can form intergranular movies that decrease high-temperature strength and oxidation resistance.
Residual porosity, even at low levels (
10月アドバンストセラミックス株式会社設立 17, 2012, 研究開発に力を入れているハイテク企業です, 生産, 処理, 炭化ケイ素セラミック板等のセラミックス関連材料の販売及び技術サービス. 当社の製品には炭化ホウ素セラミック製品が含まれますが、これに限定されません。, 窒化ホウ素セラミックス製品, 炭化ケイ素セラミックス製品, 窒化ケイ素セラミックス製品, 二酸化ジルコニウムセラミック製品, 等. 興味があれば, お気軽にお問い合わせください.
タグ: 炭化ケイ素プレート,超硬プレート,炭化ケイ素シート
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