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Product descriptionProduct Name:Black TransparentElectromagnetic Oven panelGuangdongKediGlass-ceramicIndustrial Co., Ltd.1 Scope of ApplicationThis manual applies toblack transparentglass ceramics panel.2 Reference StandardGuangdongProvinceIndustry Standard,Q/PKT02-2007Broad Black Transparent Glass-ceramic Plate.3 MaterialBlack transparent glass ceramics are used to meet the special requirements of electromagnetic ovenStandard features which are to be described respectively, fit the RoHS rules.3.1 Characteristics of glass ceramics3.1.1 Maximum Service Temperature:The original color of the plate will change at the temperature of 780 .3.1.2 Temperature of Thermal Shock780 (thermal shock resistancetest:after heating the electric furnace and keeping the temperature at 780, place the plate in it for 30 minutes, the characteristics of the plate keeps stable when it is immediately thrown into the water).4Specifications4.1 The size and shape oftheelectromagnetic stove panel are subject to the requirement diagram.4.2 Dimensions and test method of the product are measured in accordance with the design and the Vernier caliper. 4.3 The amount of deformation is within 1.0mm (in the process of testing, the product should be placed on the horizontal platform, and measured by a plug gauge coordinated a standard ruler. Only ruler is allowed to be place on the plate.)4.4 The allowance error of thickness is within 0.5mm.4.5 The allowance error of the straight edge is within 0.5mm. The arc edge is smooth, without broken and flanging edge.4.6 The R angle of product is within 0.3mm. The perpendicularity and parallelism is presented in Figure 1. a or a should be within 1mm:b or b should be within 1mm:Edge c should be alongside with the right angle.Figure 15 The Specification of Shape5.1 Panel: bright and uniform color without apparent sand inclusion, scratch, blot or edge broken.5.2 Screen-printing: the pattern and color are in accordance with the design for the customer.6 Physical and Chemical PropertiesThe reference of physical and chemical properties is in the following table:Index of Physical and Chemical PropertiesItemIndexThermal Shock ResistanceNo deformation at 760 Linear Expansion Coefficient-1.5+510-7/（0700）Density (Specific gravity)2.550.02g/cm3Acid resistance0.25mg/cm2Alkali resistance0.3mg/cm2Shock strengthNo deformation under specified conditions (110mm)Mohs strength5.06.1 Thermal Properties6.1.1 Heat ResistanceIn non-screen printing condition, no deformation after 100h in the environment of 500.6.1.2 Thermal Shock Resistance Heated for 30min in the temperature of 760, no deformation after immersion in water of 20.6.1.3 Thermal DeformationThe thermal expansion coefficient of the plate material is -1.5+510-7/ at the range of 30700. Testing reference: GB/T16920-1997. The heating rate is 5/min in the medium of air oxygen. Testing equipment: NETZSCHDLL-402C.6.2 Mechanical Properties6.2.1 Mohs StrengthThe Mohs strength is 6.5, under the execution of term 6.5.4 in JC/T.6.2.2 Shock StrengthTesting is executed by the following mechanical strength test. The appearance of the plate remains the same after the testing.Products (test sample) is placed in accordance with that in Figure 2. Three continuous hits was exerted on the center point of test sample by a 525g solid steel ball of 50mm in diameter.Figure 26.3 Chemical Properties6.3.1 Acid ResistanceUnder non-screen printing condition, the corrosion rate of glass-ceramic plate is under 0.25mg/cm2 after 24h immersion in 5% hydrochloric acid solution at 90.6.3.2 Alkali ResistanceUnder non-screen printing condition, the corrosion rate of glass-ceramic plate is under 0.3mg/cm2 after 24h immersion in 5% sodium carbonate solution at 90.7 Screen-printing Property7.1 Temperature Property of Screen-printingAfter thermal shock test, stripping test was executed on the screen-printed part on the surface. Tapes were pull out from the surface at an angle of 45,no appearance spalling happens. The adhesive force of the tape should be above 2.94N/10mm.7.2 Durability of the Screen-printingUnder normal serviceable condition, no discoloration or spalling happens. The limit temperature of the normal serviceable condition is 560. Scratching the panel surface with metal, glass etc. is forbidden. Remaining food residues is forbidden.7.3 The Abrasion Resistance of Screen-printingAbrasion test is implemented as the following. No scratch or change in gloss happens.Testing method:7.4 Alkali Resistance of Screening-printingCoating the surface with strong base solvent and cover with plastic wrap at 70 after 5h, the color remains the same, and nothing abnormal, such as printing deformation happens.8 Testing MethodsFor dimension deviation, and appearance quality, random sampling of semi-products is used. For finished products, full check is applied.9 Logo and Packaging9.1 A control number is printed on the bottom of each product. The external packing of the product should be marked with factory name, address, registered trademarks, and weight.9.2 The corrugated case is used as the external and external packing, with the external packing sealed with tape and inner packing sealed with heat-resistance tape. Between the product pear wool paper is padded, avoiding any contact between products.10 Transportation and Storage10.1 In the process of transportation, vibration should be avoided. Awns should be used to avoid exposing the products to the sun and rain. Great care should be taken during loading and unloading. 10.2 The product should be stored in the warehouse with fine air circulation and without corrosive gases, and the platform of storage should be 30cm above the ground. Normally the height of stock pile should be limited to 3 layers.
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