Product Name: Machinable Glass Ceramic Type: Ceramic Parts Material: Machinable Glass Ceramic Application: Ceramic Decorations, Refractory, Structure Ceramic, Industrial Ceramic Trademark: Gongtao Transport Package: Plywood Case Origin: Shanghai Product Description High precision macor machinable glass ceramic rod for part machiningGongtao companyspecializes inthe production and researchofmachinableceramic.The main products:Machinableceramics and tools,with goodmachiningperformance, goodvacuum,high and low temperature resistance, insulationandacid-corrosion ect properties.It can be widely used inaviation, aerospace, electronicssubstrates,high temperatureinsulationskeleton,ion plating,vacuum coating,plasmadisplaymirror,ionaccelerators,lasers, andmedical devices.Our machinableceramichas goodmachiningperformance,and can beturning, milling,grinding, drilling,drilling andtappingand other machining by ordinarymachine tools andcutting tools.Themachining accuracy can reach up to5μm,finishhighup0.5μ.It has agoodvacuum,high and low temperature resistance, insulationandacid and alkali corrosion resistance ect properties.Thermal shock resistanceof machinableceramicis very good,quenchingfrom 800°Cto0°C,nobroken, from 200°Cto 0°C,the intensitydoes notchange.The main advantage:-It can beturned,milled,grinded,drilled andtappedand other machining.-Precisionmachiningdimensions.-Non-magnetic.ItemStandard valueRemarksDensity2.6 g/m³Porosity0.069%Water absorption0Hardness4-5MohsColorPure whiteThermal expansion coefficient72×10-7/°C100°C ~600°C average valueThermal conductivity1.71W/m.k25°CWorking temperature800°CBending Strength>108MPaCompress strength>508 MPaImpact Toughness>2.56KJ/ m2Modulus of elasticity65GPaInsertion loss1~ 4×10-3Room temperatureDielectricconstant6-7"Dielectric strength>40KV/mmThickness of sample 1mmBulk density1.08×1016Ω.cm25°C1.5×1012Ω.cm200°C1.1×109Ω.cm500°CGas efficiency at normal temperature8.8×10-9ml/s. cm2Vacuum experienced for eight hoursHelium permeatingrate1×10-10ml/sAfter 500C burning,cool to room temperature.5%HC10.26mg/ cm295°C,24 hours5%HF83mg/ cm2"Conent:SiO²46%Magnesium oxide MgO 17%Aluminium oxide Al²O3 16%Potassium oxide K²O 10%Boron oxide B²O 7%Fluorine-F 4%