Trying to download created file using PHPExcel - php

Question

I followed questions on stackoverflow and ended up with the following code
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
header('Content-type: application/vnd.ms-excel');
header('Content-Disposition: attachment; filename="'.$name.'.xlsx"');
$objWriter->save('php://output');
The problem is the output file is wrong, its in Chinese (encoding probably), i want to know if there is a header for encoding or if its another problem.
Edit:
header('Content-type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Length: ' . filesize($file));
header('Content-Transfer-Encoding: binary');
header('Pragma: public');
Excel preparation code:
$iterator = 0;
foreach (get_object_vars($temp[0]) as $key => $value){
$formattedkey = str_replace('_', ' ', $key);
$objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($iterator, 1, $formattedkey);
$iterator++;
$fieldsnum++;
}
$rowiterator = 2;
foreach ($temp as $asset){
$coliterator = 0;
foreach (get_object_vars($asset) as $key => $value){
$objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($coliterator, $rowiterator, utf8_encode($value));
$coliterator++;
}
$rowiterator++;
}