Relation between oxygen concentration in AlN lattice and thermal conductivity of AlN ceramics sintered with various sintering additives

スポンサーリンク

概要

• 論文の詳細を見る

• Aluminum nitride (AlN) ceramics were fabricated by pressureless sintering with various sintering additives such as 5 mass % Y2O3, 2 mass % Y2O3–3 mass % Al2O3, 3 mass % Y2O3–1 mass % CaO–0.08 mass % B, and 6 mass % Y2O3–2 mass % CaO–0.16 mass % B. The relative density, phases present, lattice parameter c, and thermal conductivity of the samples were evaluated. The oxygen concentration in AlN lattice was estimated from the lattice parameter c by using the relation between the oxygen concentration and the lattice parameter c of AlN. To analyze the effects on the thermal conductivity of the samples, we plotted the oxygen concentration in AlN lattice estimated from the lattice parameters c versus the thermal resistivity, which is inverse of the thermal conductivity measured in this work. The data of the samples sintered with 5 mass % Y2O3 and 3 mass % Y2O3–1 mass % CaO–0.08 mass % B located on the plot of the relation between oxygen concentration in AlN lattice and thermal resistivity of AlN presented by Slack (Slack’s line) or Harris et al. (Harris’s line), respectively. In contrast, the data of the samples sintered with 2 mass % Y2O3–3 mass % Al2O3 and 6 mass % Y2O3–2 mass % CaO–0.16 mass % B, which contain excess grain boundary phases, located above the Harris’s line. It was suggested that the thermal conductivity of the samples could be influenced by the density, the oxygen content in AlN lattice, and the presence of grain boundary phases.

著者

• Imamura Makoto

  Department Of Internal Medicine Public Tomioka General Hospital

• Kobayashi Ryota

  Department Of Medicine And Molecular Science Gunma University Graduate School Of Medicine

• Oh-ishi Katsuyoshi

  Department Of Applied Chemistry Faculty Of Science And Engineering Chuo University

• MORIYA Yoshiaki

  Department of Communications Engineering, School of Engineering

• OOSAWA Kazuhiro

  Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University

• Kobayashi Ryota

  Department Of Applied Chemistry Faculty Of Science And Engineering Chuo University

• Moriya Yoshiaki

  Department Of Communications Engineering

• OH-ISHI Katsuyoshi

  Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University

• MORIYA Yoshiaki

  Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University

• IMAMURA Makoto

  Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University

• KOBAYASHI Ryota

  Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University

関連論文

• Deterioration of Retinopathy After Starting Interferon Therapy for Chronic Hepatitis C with Diabetic Triopathy
• Secondary Hemochromatosis Accompanied by Diabetes Mellitus and Hypogonadism.
• Seroconversion of Glutamic Acid Decarboxylase Antibodies in a Patient Initially Diagnosed as Having Type 2 Diabetes Mellitus
• Metformin Use in an Obese Diabetic Patient from Weeks 1 to 21 of Pregnancy.
• Sarcoid Granulomatous Interstitial Nephritis Accompanied by Type 2 Diabetes Mellitus
• Graves' Disease Accompanied by Anti-myeloperoxidase Antibody-related Nephropathy and Autoimmune Hepatitis
• Subclinical Cushing's Disease Accompanied by Malignant Hypertension and Diabetes Mellitus
• 17α-Hydroxylase Deficiency Accompanied by Adrenal Myelolipoma
• M ultiple Organ Failure Followed by Intrauterine Klebsiella Pneumoniae Infection Associated with Diabetes M ellitus
• Massive Hemoptysis Due to Pulmonary Tuberculosis
• Perturbation Calculation for the 16 Lowest-Energy States in Spin Doughnut Mo_V_(Condensed Matter Physics)
• Synthesis and CO_2 Absorption Properties of Single-phase Li_2CuO_2 as a CO_2 Absorbent
• Synthesis and CO_2 Absorption Property of Li_4TiO_4 as a Novel CO_2 Absorbent
• Characteristics of Scintillation Phenomena on 12GHz Earth-Space Paths
• Relation between oxygen concentration in AlN lattice and thermal conductivity of AlN ceramics sintered with various sintering additives
• Particle size dependence of CO_2 absorption rate of powdered Li_4SiO_4 with different particle size
• Observation of Water Vapor Attenuation at Ku Band in Tropical Region(2004 International Symposium on Antennas and Propagation)
• Impact of Meteorological Characteristics on Satellite Broadcasting Signals in Laos
• The Signal Level Indication Method for Tropospheric Scintillation of Ku-Band
• Characteristics of Spike type Ionospheric Scintillation at 1.5 GHz
• Fabrication of a Continuously Measuring Rain Gauge for Tropical Area
• Subclinical Cushing's Disease Accompanied by Malignant Hypertension and Diabetes Mellitus
• 3PT145 長鎖リン脂質DMPCと短鎖リン脂質DHPCで構成される複雑な相挙動のダイナミクス(日本生物物理学会第50回年会(2012年度))
• Mosapride Citrate for Colonoscopy Preparation with Lavage.

もっと見る 閉じる

スポンサーリンク