My data grid is slow in filling data and too much slow in scroll data

<DataGrid x:Name="GrdMaterials" AutoGenerateColumns="False" Width="1488" HorizontalAlignment="Left" VerticalAlignment="Stretch" Canvas.Left="2" Canvas.Top="10" FontFamily="Times New Roman" MaxHeight="462">

    <DataGrid.Columns>

        <DataGridTextColumn Header="Paper Category"  Width="100"  Binding="{Binding MatCat}"/>
        <DataGridTextColumn Header="Material ID"  Width="70"  Binding="{Binding MatId}"/>
        <DataGridTextColumn Header="Material Description"  Width="350"  Binding="{Binding MatDesc}"/>
        <DataGridTextColumn Header="w"  Width="70" Visibility="Hidden" Binding="{Binding Width}"/>
        <DataGridTextColumn Header="h"  Width="70" Visibility="Hidden" Binding="{Binding Height}"/>
        <DataGridTextColumn Header="Grammage"  Width="70"  Binding="{Binding MatGram}"/>
        <DataGridTextColumn Header="Last Purchase Price 1000SH" Width="150" Binding="{Binding MatLstPurPris1000Sh}"/>
        <DataGridTextColumn Header="Last Purchase Price 1000KG" Width="150" Binding="{Binding MatLstPurPris1000Kg}"/>
        <DataGridTextColumn Header="Market Price 1000SH" Width="120"  Binding="{Binding MatOldMarket1000Sh}"/>
        <DataGridTextColumn Header="Market Price 1000KG" Width="120"  Binding="{Binding MatOldMarket1000Kg}"/>
        <DataGridTextColumn Header="New Market Price 1000KG" Width="150" Binding="{Binding MatMarket}"/>
        <DataGridCheckBoxColumn Header="Update" Width="50" Binding="{Binding Check}"/>

    </DataGrid.Columns>

</DataGrid>